feat(mobile): stack original + edited photo on ios

Detect an iOS edit, upload the unedited original, and stack the edited
version on top of it. Reverting in Photos flips the stack cover back to
the original and keeps the edits. Adds an optional stackParentId field to
the asset upload on the server.

mobile/android/app/src/main/kotlin/app/alextran/immich/MainActivity.kt

@@ -17,6 +17,8 @@ import app.alextran.immich.images.LocalImageApi
 import app.alextran.immich.images.LocalImagesImpl
 import app.alextran.immich.images.RemoteImageApi
 import app.alextran.immich.images.RemoteImagesImpl
+import app.alextran.immich.permission.PermissionApi
+import app.alextran.immich.permission.PermissionApiImpl
 import app.alextran.immich.sync.NativeSyncApi
 import app.alextran.immich.sync.NativeSyncApiImpl26
 import app.alextran.immich.sync.NativeSyncApiImpl30
@@ -44,7 +46,9 @@ class MainActivity : FlutterFragmentActivity() {
         } else {
           NativeSyncApiImpl30(ctx)
         }
+      val permissionApiImpl = PermissionApiImpl(ctx)
       NativeSyncApi.setUp(messenger, nativeSyncApiImpl)
+      PermissionApi.setUp(messenger, permissionApiImpl)
       LocalImageApi.setUp(messenger, LocalImagesImpl(ctx))
       RemoteImageApi.setUp(messenger, RemoteImagesImpl(ctx))
 
@@ -53,6 +57,7 @@ class MainActivity : FlutterFragmentActivity() {
 
       flutterEngine.plugins.add(backgroundEngineLockImpl)
       flutterEngine.plugins.add(nativeSyncApiImpl)
+      flutterEngine.plugins.add(permissionApiImpl)
     }
 
     fun cancelPlugins(flutterEngine: FlutterEngine) {
@@ -60,6 +65,8 @@ class MainActivity : FlutterFragmentActivity() {
         flutterEngine.plugins.get(NativeSyncApiImpl26::class.java) as ImmichPlugin?
           ?: flutterEngine.plugins.get(NativeSyncApiImpl30::class.java) as ImmichPlugin?
       nativeApi?.detachFromEngine()
+      val permissionApi = flutterEngine.plugins.get(PermissionApiImpl::class.java) as ImmichPlugin?
+      permissionApi?.detachFromEngine()
     }
   }
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/permission/ManageMediaPermissionDelegate.kt

@@ -0,0 +1,96 @@
+package app.alextran.immich.permission
+
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.provider.MediaStore
+import android.provider.Settings
+import androidx.core.net.toUri
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+import io.flutter.plugin.common.PluginRegistry
+
+class ManageMediaPermissionDelegate(
+  context: Context,
+  private val requestCode: Int = 1003,
+) : PluginRegistry.ActivityResultListener {
+  private val ctx = context.applicationContext
+  private var activityBinding: ActivityPluginBinding? = null
+  private var pendingResult: ((Result<Boolean>) -> Unit)? = null
+
+  fun hasManageMediaPermission(): Boolean {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+      MediaStore.canManageMedia(ctx)
+    } else {
+      false
+    }
+  }
+
+  fun requestManageMediaPermission(callback: (Result<Boolean>) -> Unit) {
+    if (hasManageMediaPermission()) {
+      callback(Result.success(true))
+      return
+    }
+
+    openManageMediaPermissionSettings(callback)
+  }
+
+  fun manageMediaPermission(callback: (Result<Boolean>) -> Unit) {
+    openManageMediaPermissionSettings(callback)
+  }
+
+  private fun openManageMediaPermissionSettings(callback: (Result<Boolean>) -> Unit) {
+    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+      callback(Result.success(false))
+      return
+    }
+
+    val activity = activityBinding?.activity
+    if (activity == null) {
+      callback(Result.failure(FlutterError("NO_ACTIVITY", "Activity not available", null)))
+      return
+    }
+
+    pendingResult = callback
+    val intent = Intent(Settings.ACTION_REQUEST_MANAGE_MEDIA).apply {
+      data = "package:${activity.packageName}".toUri()
+    }
+    try {
+      activity.startActivityForResult(intent, requestCode)
+    } catch (e: Exception) {
+      pendingResult = null
+      callback(
+        Result.failure(
+          FlutterError("ACTIVITY_LAUNCH_FAILED", "Failed to launch MANAGE_MEDIA settings", e.toString())
+        )
+      )
+    }
+  }
+
+  fun onAttachedToActivity(binding: ActivityPluginBinding) {
+    activityBinding = binding
+    binding.addActivityResultListener(this)
+  }
+
+  fun onDetachedFromActivity() {
+    failPending("ACTIVITY_DETACHED", "Activity detached before MANAGE_MEDIA result")
+    activityBinding?.removeActivityResultListener(this)
+    activityBinding = null
+  }
+
+  override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?): Boolean {
+    if (requestCode == this.requestCode) {
+      val callback = pendingResult
+      pendingResult = null
+      callback?.invoke(Result.success(hasManageMediaPermission()))
+      return true
+    }
+
+    return false
+  }
+
+  private fun failPending(code: String, message: String) {
+    val callback = pendingResult ?: return
+    pendingResult = null
+    callback(Result.failure(FlutterError(code, message, null)))
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/permission/PermissionApi.g.kt

@@ -0,0 +1,128 @@
+// Autogenerated from Pigeon (v26.3.4), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+@file:Suppress("UNCHECKED_CAST", "ArrayInDataClass")
+
+package app.alextran.immich.permission
+
+import android.util.Log
+import io.flutter.plugin.common.BasicMessageChannel
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MessageCodec
+import io.flutter.plugin.common.StandardMethodCodec
+import io.flutter.plugin.common.StandardMessageCodec
+import java.io.ByteArrayOutputStream
+import java.nio.ByteBuffer
+private object PermissionApiPigeonUtils {
+
+  fun wrapResult(result: Any?): List<Any?> {
+    return listOf(result)
+  }
+
+  fun wrapError(exception: Throwable): List<Any?> {
+    return if (exception is FlutterError) {
+      listOf(
+        exception.code,
+        exception.message,
+        exception.details
+      )
+    } else {
+      listOf(
+        exception.javaClass.simpleName,
+        exception.toString(),
+        "Cause: " + exception.cause + ", Stacktrace: " + Log.getStackTraceString(exception)
+      )
+    }
+  }
+}
+
+/**
+ * Error class for passing custom error details to Flutter via a thrown PlatformException.
+ * @property code The error code.
+ * @property message The error message.
+ * @property details The error details. Must be a datatype supported by the api codec.
+ */
+class FlutterError (
+  val code: String,
+  override val message: String? = null,
+  val details: Any? = null
+) : RuntimeException()
+private open class PermissionApiPigeonCodec : StandardMessageCodec() {
+  override fun readValueOfType(type: Byte, buffer: ByteBuffer): Any? {
+    return     super.readValueOfType(type, buffer)
+  }
+  override fun writeValue(stream: ByteArrayOutputStream, value: Any?)   {
+    super.writeValue(stream, value)
+  }
+}
+
+
+/** Generated interface from Pigeon that represents a handler of messages from Flutter. */
+interface PermissionApi {
+  fun hasManageMediaPermission(): Boolean
+  fun requestManageMediaPermission(callback: (Result<Boolean>) -> Unit)
+  fun manageMediaPermission(callback: (Result<Boolean>) -> Unit)
+
+  companion object {
+    /** The codec used by PermissionApi. */
+    val codec: MessageCodec<Any?> by lazy {
+      PermissionApiPigeonCodec()
+    }
+    /** Sets up an instance of `PermissionApi` to handle messages through the `binaryMessenger`. */
+    @JvmOverloads
+    fun setUp(binaryMessenger: BinaryMessenger, api: PermissionApi?, messageChannelSuffix: String = "") {
+      val separatedMessageChannelSuffix = if (messageChannelSuffix.isNotEmpty()) ".$messageChannelSuffix" else ""
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.PermissionApi.hasManageMediaPermission$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            val wrapped: List<Any?> = try {
+              listOf(api.hasManageMediaPermission())
+            } catch (exception: Throwable) {
+              PermissionApiPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.PermissionApi.requestManageMediaPermission$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            api.requestManageMediaPermission{ result: Result<Boolean> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(PermissionApiPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(PermissionApiPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.PermissionApi.manageMediaPermission$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            api.manageMediaPermission{ result: Result<Boolean> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(PermissionApiPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(PermissionApiPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+    }
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/permission/PermissionApiImpl.kt

@@ -0,0 +1,37 @@
+package app.alextran.immich.permission
+
+import android.content.Context
+import app.alextran.immich.core.ImmichPlugin
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+
+class PermissionApiImpl(context: Context) : ImmichPlugin(), PermissionApi, ActivityAware {
+  private val manageMediaPermissionDelegate = ManageMediaPermissionDelegate(context)
+
+  override fun hasManageMediaPermission(): Boolean =
+    manageMediaPermissionDelegate.hasManageMediaPermission()
+
+  override fun requestManageMediaPermission(callback: (Result<Boolean>) -> Unit) {
+    manageMediaPermissionDelegate.requestManageMediaPermission { completeWhenActive(callback, it) }
+  }
+
+  override fun manageMediaPermission(callback: (Result<Boolean>) -> Unit) {
+    manageMediaPermissionDelegate.manageMediaPermission { completeWhenActive(callback, it) }
+  }
+
+  override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+    manageMediaPermissionDelegate.onAttachedToActivity(binding)
+  }
+
+  override fun onDetachedFromActivityForConfigChanges() {
+    manageMediaPermissionDelegate.onDetachedFromActivity()
+  }
+
+  override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+    manageMediaPermissionDelegate.onAttachedToActivity(binding)
+  }
+
+  override fun onDetachedFromActivity() {
+    manageMediaPermissionDelegate.onDetachedFromActivity()
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MediaTrashDelegate.kt

@@ -0,0 +1,133 @@
+package app.alextran.immich.sync
+
+import android.app.Activity
+import android.content.ContentResolver
+import android.content.ContentUris
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
+import android.os.Bundle
+import android.provider.MediaStore
+import androidx.annotation.RequiresApi
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+import io.flutter.plugin.common.PluginRegistry
+
+class MediaTrashDelegate(
+  context: Context,
+  private val trashRequestCode: Int = 1002,
+) : PluginRegistry.ActivityResultListener {
+  private val ctx = context.applicationContext
+  private var activityBinding: ActivityPluginBinding? = null
+  private var pendingResult: ((Result<Boolean>) -> Unit)? = null
+
+  private fun hasManageMediaPermission(): Boolean {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+      MediaStore.canManageMedia(ctx)
+    } else {
+      false
+    }
+  }
+
+  fun restoreFromTrashById(mediaId: String, type: Long, callback: (Result<Boolean>) -> Unit) {
+    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R || !hasManageMediaPermission()) {
+      callback(Result.failure(FlutterError("PERMISSION_DENIED", "Media permission required", null)))
+      return
+    }
+
+    val id = mediaId.toLongOrNull()
+    if (id == null) {
+      callback(Result.failure(FlutterError("INVALID_ID", "The file id is not a valid number: $mediaId", null)))
+      return
+    }
+
+    if (!isInTrash(id)) {
+      callback(Result.failure(FlutterError("TRASH_NOT_FOUND", "Item with id=$id not found in trash", null)))
+      return
+    }
+
+    restoreUri(ContentUris.withAppendedId(contentUriForType(type.toInt()), id), callback)
+  }
+
+  @RequiresApi(Build.VERSION_CODES.R)
+  private fun restoreUri(
+    contentUri: Uri,
+    callback: (Result<Boolean>) -> Unit,
+  ) {
+    val activity = activityBinding?.activity
+    if (activity == null) {
+      callback(Result.failure(FlutterError("NO_ACTIVITY", "Activity not available", null)))
+      return
+    }
+
+    try {
+      val pendingIntent = MediaStore.createTrashRequest(ctx.contentResolver, listOf(contentUri), false)
+      pendingResult = callback
+      activity.startIntentSenderForResult(
+        pendingIntent.intentSender,
+        trashRequestCode,
+        null,
+        0,
+        0,
+        0,
+      )
+    } catch (e: Exception) {
+      pendingResult = null
+      callback(
+        Result.failure(
+          FlutterError("TRASH_ERROR", "Error creating or starting trash request", e.toString())
+        )
+      )
+    }
+  }
+
+  @RequiresApi(Build.VERSION_CODES.R)
+  private fun isInTrash(id: Long): Boolean {
+    val filesUri = MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL)
+    val args = Bundle().apply {
+      putString(ContentResolver.QUERY_ARG_SQL_SELECTION, "${MediaStore.Files.FileColumns._ID}=?")
+      putStringArray(ContentResolver.QUERY_ARG_SQL_SELECTION_ARGS, arrayOf(id.toString()))
+      putInt(MediaStore.QUERY_ARG_MATCH_TRASHED, MediaStore.MATCH_ONLY)
+      putInt(ContentResolver.QUERY_ARG_LIMIT, 1)
+    }
+    return ctx.contentResolver.query(filesUri, arrayOf(MediaStore.Files.FileColumns._ID), args, null)
+      ?.use { it.moveToFirst() } == true
+  }
+
+  private fun contentUriForType(type: Int): Uri =
+    when (type) {
+      // Same order as AssetType from Dart.
+      1 -> MediaStore.Images.Media.EXTERNAL_CONTENT_URI
+      2 -> MediaStore.Video.Media.EXTERNAL_CONTENT_URI
+      3 -> MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
+      else -> MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL)
+    }
+
+  fun onAttachedToActivity(binding: ActivityPluginBinding) {
+    activityBinding = binding
+    binding.addActivityResultListener(this)
+  }
+
+  fun onDetachedFromActivity() {
+    failPending("ACTIVITY_DETACHED", "Activity detached before trash result")
+    activityBinding?.removeActivityResultListener(this)
+    activityBinding = null
+  }
+
+  override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?): Boolean {
+    if (requestCode == trashRequestCode) {
+      val callback = pendingResult
+      pendingResult = null
+      callback?.invoke(Result.success(resultCode == Activity.RESULT_OK))
+      return true
+    }
+
+    return false
+  }
+
+  private fun failPending(code: String, message: String) {
+    val callback = pendingResult ?: return
+    pendingResult = null
+    callback(Result.failure(FlutterError(code, message, null)))
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/Messages.g.kt

@@ -207,6 +207,18 @@ enum class PlatformAssetPlaybackStyle(val raw: Int) {
   }
 }
 
+enum class EditState(val raw: Int) {
+  NOT_EDITED(0),
+  EDITED(1),
+  UNKNOWN(2);
+
+  companion object {
+    fun ofRaw(raw: Int): EditState? {
+      return values().firstOrNull { it.raw == raw }
+    }
+  }
+}
+
 /** Generated class from Pigeon that represents data sent in messages. */
 data class PlatformAsset (
   val id: String,
@@ -472,6 +484,52 @@ data class CloudIdResult (
     return result
   }
 }
+
+/** Generated class from Pigeon that represents data sent in messages. */
+data class BaseResource (
+  val path: String,
+  val sha1: String,
+  val sizeBytes: Long,
+  val mimeType: String
+)
+ {
+  companion object {
+    fun fromList(pigeonVar_list: List<Any?>): BaseResource {
+      val path = pigeonVar_list[0] as String
+      val sha1 = pigeonVar_list[1] as String
+      val sizeBytes = pigeonVar_list[2] as Long
+      val mimeType = pigeonVar_list[3] as String
+      return BaseResource(path, sha1, sizeBytes, mimeType)
+    }
+  }
+  fun toList(): List<Any?> {
+    return listOf(
+      path,
+      sha1,
+      sizeBytes,
+      mimeType,
+    )
+  }
+  override fun equals(other: Any?): Boolean {
+    if (other == null || other.javaClass != javaClass) {
+      return false
+    }
+    if (this === other) {
+      return true
+    }
+    val other = other as BaseResource
+    return MessagesPigeonUtils.deepEquals(this.path, other.path) && MessagesPigeonUtils.deepEquals(this.sha1, other.sha1) && MessagesPigeonUtils.deepEquals(this.sizeBytes, other.sizeBytes) && MessagesPigeonUtils.deepEquals(this.mimeType, other.mimeType)
+  }
+
+  override fun hashCode(): Int {
+    var result = javaClass.hashCode()
+    result = 31 * result + MessagesPigeonUtils.deepHash(this.path)
+    result = 31 * result + MessagesPigeonUtils.deepHash(this.sha1)
+    result = 31 * result + MessagesPigeonUtils.deepHash(this.sizeBytes)
+    result = 31 * result + MessagesPigeonUtils.deepHash(this.mimeType)
+    return result
+  }
+}
 private open class MessagesPigeonCodec : StandardMessageCodec() {
   override fun readValueOfType(type: Byte, buffer: ByteBuffer): Any? {
     return when (type) {
@@ -481,30 +539,40 @@ private open class MessagesPigeonCodec : StandardMessageCodec() {
         }
       }
       130.toByte() -> {
-        return (readValue(buffer) as? List<Any?>)?.let {
-          PlatformAsset.fromList(it)
+        return (readValue(buffer) as Long?)?.let {
+          EditState.ofRaw(it.toInt())
         }
       }
       131.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          PlatformAlbum.fromList(it)
+          PlatformAsset.fromList(it)
         }
       }
       132.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          SyncDelta.fromList(it)
+          PlatformAlbum.fromList(it)
         }
       }
       133.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          HashResult.fromList(it)
+          SyncDelta.fromList(it)
         }
       }
       134.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          HashResult.fromList(it)
+        }
+      }
+      135.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
           CloudIdResult.fromList(it)
         }
       }
+      136.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          BaseResource.fromList(it)
+        }
+      }
       else -> super.readValueOfType(type, buffer)
     }
   }
@@ -514,26 +582,34 @@ private open class MessagesPigeonCodec : StandardMessageCodec() {
         stream.write(129)
         writeValue(stream, value.raw.toLong())
       }
-      is PlatformAsset -> {
+      is EditState -> {
         stream.write(130)
-        writeValue(stream, value.toList())
+        writeValue(stream, value.raw.toLong())
       }
-      is PlatformAlbum -> {
+      is PlatformAsset -> {
         stream.write(131)
         writeValue(stream, value.toList())
       }
-      is SyncDelta -> {
+      is PlatformAlbum -> {
         stream.write(132)
         writeValue(stream, value.toList())
       }
-      is HashResult -> {
+      is SyncDelta -> {
         stream.write(133)
         writeValue(stream, value.toList())
       }
-      is CloudIdResult -> {
+      is HashResult -> {
         stream.write(134)
         writeValue(stream, value.toList())
       }
+      is CloudIdResult -> {
+        stream.write(135)
+        writeValue(stream, value.toList())
+      }
+      is BaseResource -> {
+        stream.write(136)
+        writeValue(stream, value.toList())
+      }
       else -> super.writeValue(stream, value)
     }
   }
@@ -553,7 +629,10 @@ interface NativeSyncApi {
   fun hashAssets(assetIds: List<String>, allowNetworkAccess: Boolean, callback: (Result<List<HashResult>>) -> Unit)
   fun cancelHashing()
   fun getTrashedAssets(): Map<String, List<PlatformAsset>>
+  fun restoreFromTrashById(mediaId: String, type: Long, callback: (Result<Boolean>) -> Unit)
   fun getCloudIdForAssetIds(assetIds: List<String>): List<CloudIdResult>
+  fun getBaseResource(assetId: String, allowNetworkAccess: Boolean, callback: (Result<BaseResource?>) -> Unit)
+  fun getEditState(assetId: String, allowNetworkAccess: Boolean, callback: (Result<EditState>) -> Unit)
 
   companion object {
     /** The codec used by NativeSyncApi. */
@@ -747,6 +826,27 @@ interface NativeSyncApi {
           channel.setMessageHandler(null)
         }
       }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.restoreFromTrashById$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val mediaIdArg = args[0] as String
+            val typeArg = args[1] as Long
+            api.restoreFromTrashById(mediaIdArg, typeArg) { result: Result<Boolean> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
       run {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds$separatedMessageChannelSuffix", codec, taskQueue)
         if (api != null) {
@@ -764,6 +864,48 @@ interface NativeSyncApi {
           channel.setMessageHandler(null)
         }
       }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getBaseResource$separatedMessageChannelSuffix", codec, taskQueue)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val assetIdArg = args[0] as String
+            val allowNetworkAccessArg = args[1] as Boolean
+            api.getBaseResource(assetIdArg, allowNetworkAccessArg) { result: Result<BaseResource?> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getEditState$separatedMessageChannelSuffix", codec, taskQueue)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val assetIdArg = args[0] as String
+            val allowNetworkAccessArg = args[1] as Boolean
+            api.getEditState(assetIdArg, allowNetworkAccessArg) { result: Result<EditState> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
     }
   }
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImplBase.kt

@@ -17,6 +17,8 @@ import com.bumptech.glide.Glide
 import com.bumptech.glide.load.ImageHeaderParser
 import com.bumptech.glide.load.ImageHeaderParserUtils
 import com.bumptech.glide.load.resource.bitmap.DefaultImageHeaderParser
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -39,10 +41,11 @@ sealed class AssetResult {
 private const val TAG = "NativeSyncApiImplBase"
 
 @SuppressLint("InlinedApi")
-open class NativeSyncApiImplBase(context: Context) : ImmichPlugin() {
+open class NativeSyncApiImplBase(context: Context) : ImmichPlugin(), ActivityAware {
   private val ctx: Context = context.applicationContext
 
   private var hashTask: Job? = null
+  private val mediaTrashDelegate = MediaTrashDelegate(ctx)
 
   companion object {
     private const val MAX_CONCURRENT_HASH_OPERATIONS = 16
@@ -448,9 +451,39 @@ open class NativeSyncApiImplBase(context: Context) : ImmichPlugin() {
     hashTask = null
   }
 
+  fun restoreFromTrashById(mediaId: String, type: Long, callback: (Result<Boolean>) -> Unit) {
+    mediaTrashDelegate.restoreFromTrashById(mediaId, type) { completeWhenActive(callback, it) }
+  }
+
+  override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+    mediaTrashDelegate.onAttachedToActivity(binding)
+  }
+
+  override fun onDetachedFromActivityForConfigChanges() {
+    mediaTrashDelegate.onDetachedFromActivity()
+  }
+
+  override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+    mediaTrashDelegate.onAttachedToActivity(binding)
+  }
+
+  override fun onDetachedFromActivity() {
+    mediaTrashDelegate.onDetachedFromActivity()
+  }
+
   // This method is only implemented on iOS; on Android, we do not have a concept of cloud IDs
   @Suppress("unused", "UNUSED_PARAMETER")
   fun getCloudIdForAssetIds(assetIds: List<String>): List<CloudIdResult> {
     return emptyList()
   }
+
+  // Android has no Photos-style edit original to stack; iOS-only.
+  fun getBaseResource(assetId: String, allowNetworkAccess: Boolean, callback: (Result<BaseResource?>) -> Unit) {
+    callback(Result.success(null))
+  }
+
+  // iOS-only; Android assets never carry a Photos-style edit.
+  fun getEditState(assetId: String, allowNetworkAccess: Boolean, callback: (Result<EditState>) -> Unit) {
+    callback(Result.success(EditState.NOT_EDITED))
+  }
 }

mobile/ios/Runner.xcodeproj/project.pbxproj

@@ -19,6 +19,8 @@
 		B21E34AC2E5B09190031FDB9 /* BackgroundWorker.swift in Sources */ = {isa = PBXBuildFile; fileRef = B21E34AB2E5B09100031FDB9 /* BackgroundWorker.swift */; };
 		B25D377A2E72CA15008B6CA7 /* Connectivity.g.swift in Sources */ = {isa = PBXBuildFile; fileRef = B25D37782E72CA15008B6CA7 /* Connectivity.g.swift */; };
 		B25D377C2E72CA26008B6CA7 /* ConnectivityApiImpl.swift in Sources */ = {isa = PBXBuildFile; fileRef = B25D377B2E72CA20008B6CA7 /* ConnectivityApiImpl.swift */; };
+		B2EE00022E72CA15008B6CA7 /* PermissionApi.g.swift in Sources */ = {isa = PBXBuildFile; fileRef = B2EE00012E72CA15008B6CA7 /* PermissionApi.g.swift */; };
+		B2EE00042E72CA15008B6CA7 /* PermissionApiImpl.swift in Sources */ = {isa = PBXBuildFile; fileRef = B2EE00032E72CA15008B6CA7 /* PermissionApiImpl.swift */; };
 		B2BE315F2E5E5229006EEF88 /* BackgroundWorker.g.swift in Sources */ = {isa = PBXBuildFile; fileRef = B2BE315E2E5E5229006EEF88 /* BackgroundWorker.g.swift */; };
 		D218389C4A4C4693F141F7D1 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 886774DBDDE6B35BF2B4F2CD /* Pods_Runner.framework */; };
 		F02538E92DFBCBDD008C3FA3 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
@@ -105,6 +107,8 @@
 		B21E34AB2E5B09100031FDB9 /* BackgroundWorker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BackgroundWorker.swift; sourceTree = "<group>"; };
 		B25D37782E72CA15008B6CA7 /* Connectivity.g.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Connectivity.g.swift; sourceTree = "<group>"; };
 		B25D377B2E72CA20008B6CA7 /* ConnectivityApiImpl.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConnectivityApiImpl.swift; sourceTree = "<group>"; };
+		B2EE00012E72CA15008B6CA7 /* PermissionApi.g.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PermissionApi.g.swift; sourceTree = "<group>"; };
+		B2EE00032E72CA15008B6CA7 /* PermissionApiImpl.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PermissionApiImpl.swift; sourceTree = "<group>"; };
 		B2BE315E2E5E5229006EEF88 /* BackgroundWorker.g.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BackgroundWorker.g.swift; sourceTree = "<group>"; };
 		E0E99CDC17B3EB7FA8BA2332 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 		F0B57D382DF764BD00DC5BCC /* WidgetExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = WidgetExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -283,6 +287,7 @@
 				B25D37792E72CA15008B6CA7 /* Connectivity */,
 				B21E34A62E5AF9760031FDB9 /* Background */,
 				B2CF7F8C2DDE4EBB00744BF6 /* Sync */,
+				B2EE00052E72CA15008B6CA7 /* Permission */,
 				FA9973382CF6DF4B000EF859 /* Runner.entitlements */,
 				FAC7416727DB9F5500C668D8 /* RunnerProfile.entitlements */,
 				97C146FA1CF9000F007C117D /* Main.storyboard */,
@@ -317,6 +322,15 @@
 			path = Connectivity;
 			sourceTree = "<group>";
 		};
+		B2EE00052E72CA15008B6CA7 /* Permission */ = {
+			isa = PBXGroup;
+			children = (
+				B2EE00032E72CA15008B6CA7 /* PermissionApiImpl.swift */,
+				B2EE00012E72CA15008B6CA7 /* PermissionApi.g.swift */,
+			);
+			path = Permission;
+			sourceTree = "<group>";
+		};
 		FAC6F8B62D287F120078CB2F /* ShareExtension */ = {
 			isa = PBXGroup;
 			children = (
@@ -619,6 +633,8 @@
 				FE5499F42F1197D8006016CB /* RemoteImages.g.swift in Sources */,
 				FE5FE4AE2F30FBC000A71243 /* ImageProcessing.swift in Sources */,
 				B25D377A2E72CA15008B6CA7 /* Connectivity.g.swift in Sources */,
+				B2EE00022E72CA15008B6CA7 /* PermissionApi.g.swift in Sources */,
+				B2EE00042E72CA15008B6CA7 /* PermissionApiImpl.swift in Sources */,
 				FE5499F82F1198E2006016CB /* RemoteImagesImpl.swift in Sources */,
 				FEAFA8732E4D42F4001E47FE /* Thumbhash.swift in Sources */,
 				B25D377C2E72CA26008B6CA7 /* ConnectivityApiImpl.swift in Sources */,

mobile/ios/Runner/AppDelegate.swift

@@ -26,6 +26,7 @@ import native_video_player
 
   public static func registerPlugins(with registry: FlutterPluginRegistry, messenger: FlutterBinaryMessenger) {
     NativeSyncApiImpl.register(with: registry.registrar(forPlugin: NativeSyncApiImpl.name)!)
+    PermissionApiSetup.setUp(binaryMessenger: messenger, api: PermissionApiImpl())
     LocalImageApiSetup.setUp(binaryMessenger: messenger, api: LocalImageApiImpl())
     RemoteImageApiSetup.setUp(binaryMessenger: messenger, api: RemoteImageApiImpl())
     BackgroundWorkerFgHostApiSetup.setUp(binaryMessenger: messenger, api: BackgroundWorkerApiImpl())

mobile/ios/Runner/Permission/PermissionApi.g.swift

@@ -0,0 +1,106 @@
+// Autogenerated from Pigeon (v26.3.4), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+
+import Foundation
+
+#if os(iOS)
+  import Flutter
+#elseif os(macOS)
+  import FlutterMacOS
+#else
+  #error("Unsupported platform.")
+#endif
+
+private func wrapResult(_ result: Any?) -> [Any?] {
+  return [result]
+}
+
+private func wrapError(_ error: Any) -> [Any?] {
+  if let pigeonError = error as? PigeonError {
+    return [
+      pigeonError.code,
+      pigeonError.message,
+      pigeonError.details,
+    ]
+  }
+  if let flutterError = error as? FlutterError {
+    return [
+      flutterError.code,
+      flutterError.message,
+      flutterError.details,
+    ]
+  }
+  return [
+    "\(error)",
+    "\(Swift.type(of: error))",
+    "Stacktrace: \(Thread.callStackSymbols)",
+  ]
+}
+
+private func isNullish(_ value: Any?) -> Bool {
+  return value is NSNull || value == nil
+}
+
+private func nilOrValue<T>(_ value: Any?) -> T? {
+  if value is NSNull { return nil }
+  return value as! T?
+}
+
+/// Generated protocol from Pigeon that represents a handler of messages from Flutter.
+protocol PermissionApi {
+  func hasManageMediaPermission() throws -> Bool
+  func requestManageMediaPermission(completion: @escaping (Result<Bool, Error>) -> Void)
+  func manageMediaPermission(completion: @escaping (Result<Bool, Error>) -> Void)
+}
+
+/// Generated setup class from Pigeon to handle messages through the `binaryMessenger`.
+class PermissionApiSetup {
+  static var codec: FlutterStandardMessageCodec { FlutterStandardMessageCodec.sharedInstance() }
+  /// Sets up an instance of `PermissionApi` to handle messages through the `binaryMessenger`.
+  static func setUp(binaryMessenger: FlutterBinaryMessenger, api: PermissionApi?, messageChannelSuffix: String = "") {
+    let channelSuffix = messageChannelSuffix.count > 0 ? ".\(messageChannelSuffix)" : ""
+    let hasManageMediaPermissionChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.PermissionApi.hasManageMediaPermission\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      hasManageMediaPermissionChannel.setMessageHandler { _, reply in
+        do {
+          let result = try api.hasManageMediaPermission()
+          reply(wrapResult(result))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      hasManageMediaPermissionChannel.setMessageHandler(nil)
+    }
+    let requestManageMediaPermissionChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.PermissionApi.requestManageMediaPermission\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      requestManageMediaPermissionChannel.setMessageHandler { _, reply in
+        api.requestManageMediaPermission { result in
+          switch result {
+          case .success(let res):
+            reply(wrapResult(res))
+          case .failure(let error):
+            reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      requestManageMediaPermissionChannel.setMessageHandler(nil)
+    }
+    let manageMediaPermissionChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.PermissionApi.manageMediaPermission\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      manageMediaPermissionChannel.setMessageHandler { _, reply in
+        api.manageMediaPermission { result in
+          switch result {
+          case .success(let res):
+            reply(wrapResult(res))
+          case .failure(let error):
+            reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      manageMediaPermissionChannel.setMessageHandler(nil)
+    }
+  }
+}

mobile/ios/Runner/Permission/PermissionApiImpl.swift

@@ -0,0 +1,15 @@
+import Foundation
+
+class PermissionApiImpl: PermissionApi {
+  func hasManageMediaPermission() throws -> Bool {
+    return false
+  }
+
+  func requestManageMediaPermission(completion: @escaping (Result<Bool, Error>) -> Void) {
+    completion(.success(false))
+  }
+
+  func manageMediaPermission(completion: @escaping (Result<Bool, Error>) -> Void) {
+    completion(.success(false))
+  }
+}

mobile/ios/Runner/Sync/Messages.g.swift

@@ -183,6 +183,12 @@ enum PlatformAssetPlaybackStyle: Int {
   case videoLooping = 5
 }
 
+enum EditState: Int {
+  case notEdited = 0
+  case edited = 1
+  case unknown = 2
+}
+
 /// Generated class from Pigeon that represents data sent in messages.
 struct PlatformAsset: Hashable {
   var id: String
@@ -458,6 +464,52 @@ struct CloudIdResult: Hashable {
   }
 }
 
+/// Generated class from Pigeon that represents data sent in messages.
+struct BaseResource: Hashable {
+  var path: String
+  var sha1: String
+  var sizeBytes: Int64
+  var mimeType: String
+
+
+  // swift-format-ignore: AlwaysUseLowerCamelCase
+  static func fromList(_ pigeonVar_list: [Any?]) -> BaseResource? {
+    let path = pigeonVar_list[0] as! String
+    let sha1 = pigeonVar_list[1] as! String
+    let sizeBytes = pigeonVar_list[2] as! Int64
+    let mimeType = pigeonVar_list[3] as! String
+
+    return BaseResource(
+      path: path,
+      sha1: sha1,
+      sizeBytes: sizeBytes,
+      mimeType: mimeType
+    )
+  }
+  func toList() -> [Any?] {
+    return [
+      path,
+      sha1,
+      sizeBytes,
+      mimeType,
+    ]
+  }
+  static func == (lhs: BaseResource, rhs: BaseResource) -> Bool {
+    if Swift.type(of: lhs) != Swift.type(of: rhs) {
+      return false
+    }
+    return deepEqualsMessages(lhs.path, rhs.path) && deepEqualsMessages(lhs.sha1, rhs.sha1) && deepEqualsMessages(lhs.sizeBytes, rhs.sizeBytes) && deepEqualsMessages(lhs.mimeType, rhs.mimeType)
+  }
+
+  func hash(into hasher: inout Hasher) {
+    hasher.combine("BaseResource")
+    deepHashMessages(value: path, hasher: &hasher)
+    deepHashMessages(value: sha1, hasher: &hasher)
+    deepHashMessages(value: sizeBytes, hasher: &hasher)
+    deepHashMessages(value: mimeType, hasher: &hasher)
+  }
+}
+
 private class MessagesPigeonCodecReader: FlutterStandardReader {
   override func readValue(ofType type: UInt8) -> Any? {
     switch type {
@@ -468,15 +520,23 @@ private class MessagesPigeonCodecReader: FlutterStandardReader {
       }
       return nil
     case 130:
-      return PlatformAsset.fromList(self.readValue() as! [Any?])
+      let enumResultAsInt: Int? = nilOrValue(self.readValue() as! Int?)
+      if let enumResultAsInt = enumResultAsInt {
+        return EditState(rawValue: enumResultAsInt)
+      }
+      return nil
     case 131:
-      return PlatformAlbum.fromList(self.readValue() as! [Any?])
+      return PlatformAsset.fromList(self.readValue() as! [Any?])
     case 132:
-      return SyncDelta.fromList(self.readValue() as! [Any?])
+      return PlatformAlbum.fromList(self.readValue() as! [Any?])
     case 133:
-      return HashResult.fromList(self.readValue() as! [Any?])
+      return SyncDelta.fromList(self.readValue() as! [Any?])
     case 134:
+      return HashResult.fromList(self.readValue() as! [Any?])
+    case 135:
       return CloudIdResult.fromList(self.readValue() as! [Any?])
+    case 136:
+      return BaseResource.fromList(self.readValue() as! [Any?])
     default:
       return super.readValue(ofType: type)
     }
@@ -488,21 +548,27 @@ private class MessagesPigeonCodecWriter: FlutterStandardWriter {
     if let value = value as? PlatformAssetPlaybackStyle {
       super.writeByte(129)
       super.writeValue(value.rawValue)
-    } else if let value = value as? PlatformAsset {
+    } else if let value = value as? EditState {
       super.writeByte(130)
-      super.writeValue(value.toList())
-    } else if let value = value as? PlatformAlbum {
+      super.writeValue(value.rawValue)
+    } else if let value = value as? PlatformAsset {
       super.writeByte(131)
       super.writeValue(value.toList())
-    } else if let value = value as? SyncDelta {
+    } else if let value = value as? PlatformAlbum {
       super.writeByte(132)
       super.writeValue(value.toList())
-    } else if let value = value as? HashResult {
+    } else if let value = value as? SyncDelta {
       super.writeByte(133)
       super.writeValue(value.toList())
-    } else if let value = value as? CloudIdResult {
+    } else if let value = value as? HashResult {
       super.writeByte(134)
       super.writeValue(value.toList())
+    } else if let value = value as? CloudIdResult {
+      super.writeByte(135)
+      super.writeValue(value.toList())
+    } else if let value = value as? BaseResource {
+      super.writeByte(136)
+      super.writeValue(value.toList())
     } else {
       super.writeValue(value)
     }
@@ -537,7 +603,10 @@ protocol NativeSyncApi {
   func hashAssets(assetIds: [String], allowNetworkAccess: Bool, completion: @escaping (Result<[HashResult], Error>) -> Void)
   func cancelHashing() throws
   func getTrashedAssets() throws -> [String: [PlatformAsset]]
+  func restoreFromTrashById(mediaId: String, type: Int64, completion: @escaping (Result<Bool, Error>) -> Void)
   func getCloudIdForAssetIds(assetIds: [String]) throws -> [CloudIdResult]
+  func getBaseResource(assetId: String, allowNetworkAccess: Bool, completion: @escaping (Result<BaseResource?, Error>) -> Void)
+  func getEditState(assetId: String, allowNetworkAccess: Bool, completion: @escaping (Result<EditState, Error>) -> Void)
 }
 
 /// Generated setup class from Pigeon to handle messages through the `binaryMessenger`.
@@ -721,6 +790,24 @@ class NativeSyncApiSetup {
     } else {
       getTrashedAssetsChannel.setMessageHandler(nil)
     }
+    let restoreFromTrashByIdChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.restoreFromTrashById\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      restoreFromTrashByIdChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let mediaIdArg = args[0] as! String
+        let typeArg = args[1] as! Int64
+        api.restoreFromTrashById(mediaId: mediaIdArg, type: typeArg) { result in
+          switch result {
+          case .success(let res):
+            reply(wrapResult(res))
+          case .failure(let error):
+            reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      restoreFromTrashByIdChannel.setMessageHandler(nil)
+    }
     let getCloudIdForAssetIdsChannel = taskQueue == nil
       ? FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
       : FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec, taskQueue: taskQueue)
@@ -738,5 +825,45 @@ class NativeSyncApiSetup {
     } else {
       getCloudIdForAssetIdsChannel.setMessageHandler(nil)
     }
+    let getBaseResourceChannel = taskQueue == nil
+      ? FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getBaseResource\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+      : FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getBaseResource\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec, taskQueue: taskQueue)
+    if let api = api {
+      getBaseResourceChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let assetIdArg = args[0] as! String
+        let allowNetworkAccessArg = args[1] as! Bool
+        api.getBaseResource(assetId: assetIdArg, allowNetworkAccess: allowNetworkAccessArg) { result in
+          switch result {
+          case .success(let res):
+            reply(wrapResult(res))
+          case .failure(let error):
+            reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      getBaseResourceChannel.setMessageHandler(nil)
+    }
+    let getEditStateChannel = taskQueue == nil
+      ? FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getEditState\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+      : FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getEditState\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec, taskQueue: taskQueue)
+    if let api = api {
+      getEditStateChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let assetIdArg = args[0] as! String
+        let allowNetworkAccessArg = args[1] as! Bool
+        api.getEditState(assetId: assetIdArg, allowNetworkAccess: allowNetworkAccessArg) { result in
+          switch result {
+          case .success(let res):
+            reply(wrapResult(res))
+          case .failure(let error):
+            reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      getEditStateChannel.setMessageHandler(nil)
+    }
   }
 }

mobile/ios/Runner/Sync/MessagesImpl.swift

@@ -1,5 +1,6 @@
 import Photos
 import CryptoKit
+import UniformTypeIdentifiers
 
 struct AssetWrapper: Hashable, Equatable {
   let asset: PlatformAsset
@@ -382,6 +383,10 @@ class NativeSyncApiImpl: ImmichPlugin, NativeSyncApi, FlutterPlugin {
   func getTrashedAssets() throws -> [String: [PlatformAsset]] {
     throw PigeonError(code: "UNSUPPORTED_OS", message: "This feature not supported on iOS.", details: nil)
   }
+
+  func restoreFromTrashById(mediaId: String, type: Int64, completion: @escaping (Result<Bool, Error>) -> Void) {
+    completion(.success(false))
+  }
   
   private func getAssetsFromAlbum(in album: PHAssetCollection, options: PHFetchOptions) -> PHFetchResult<PHAsset> {
     // Ensure to actually getting all assets for the Recents album
@@ -415,4 +420,169 @@ class NativeSyncApiImpl: ImmichPlugin, NativeSyncApi, FlutterPlugin {
     }
     return mappings;
   }
+
+  func getBaseResource(
+    assetId: String,
+    allowNetworkAccess: Bool,
+    completion: @escaping (Result<BaseResource?, Error>) -> Void
+  ) {
+    Task { [weak self] in
+      guard let self = self else { return }
+
+      guard let asset = PHAsset.fetchAssets(withLocalIdentifiers: [assetId], options: nil).firstObject else {
+        return self.completeWhenActive(for: completion, with: .success(nil))
+      }
+
+      let resources = PHAssetResource.assetResources(for: asset)
+      let state = await Self.classifyEdit(resources: resources, allowNetworkAccess: allowNetworkAccess)
+      guard state == .edited, let original = resources.first(where: { $0.type == .photo }) else {
+        return self.completeWhenActive(for: completion, with: .success(nil))
+      }
+
+      do {
+        let result = try await self.streamBaseResource(
+          resource: original,
+          localId: asset.localIdentifier,
+          allowNetworkAccess: allowNetworkAccess
+        )
+        self.completeWhenActive(for: completion, with: .success(result))
+      } catch {
+        self.completeWhenActive(for: completion, with: .failure(error))
+      }
+    }
+  }
+
+  // Returns whether the asset carries a live Photos edit without reading the photo
+  // itself, only the small adjustment metadata. The revert probe relies on this to
+  // tell "not edited" apart from "couldn't read" (offloaded to iCloud), so it never
+  // mistakes an unreadable edit for a revert.
+  func getEditState(
+    assetId: String,
+    allowNetworkAccess: Bool,
+    completion: @escaping (Result<EditState, Error>) -> Void
+  ) {
+    Task { [weak self] in
+      guard let self = self else { return }
+      guard let asset = PHAsset.fetchAssets(withLocalIdentifiers: [assetId], options: nil).firstObject else {
+        // Not in the library, so don't answer "not edited" (the caller acts on that).
+        return self.completeWhenActive(for: completion, with: .success(.unknown))
+      }
+      let state = await Self.classifyEdit(
+        resources: PHAssetResource.assetResources(for: asset),
+        allowNetworkAccess: allowNetworkAccess
+      )
+      self.completeWhenActive(for: completion, with: .success(state))
+    }
+  }
+
+  // adjustmentRenderTypes for a photo with no real edit: a plain capture, a
+  // Photographic Style, or a reverted edit. A real edit changes this value.
+  private static let kNoEditRenderTypes = 27648
+
+  // Works out the edit state from Adjustments.plist only (never reads the photo).
+  // adjustmentRenderTypes is the signal: a real edit moves it off the baseline, while a
+  // plain capture, a Photographic Style, and a reverted edit all sit at the baseline. The
+  // editor id is NOT reliable: com.apple.camera authors both styles and some real edits
+  // (e.g. changing the Photographic Style after capture), so we key off the render types
+  // alone. Cleanup and object-removal write AdjustmentsSecondary.data, which we count as
+  // edited. unknown = couldn't read the plist (offloaded, no network).
+  private static func classifyEdit(resources: [PHAssetResource], allowNetworkAccess: Bool) async -> EditState {
+    if resources.contains(where: { $0.originalFilename == "AdjustmentsSecondary.data" }) {
+      return .edited
+    }
+    guard let adjRes = resources.first(where: { $0.originalFilename == "Adjustments.plist" }) else {
+      return .notEdited
+    }
+    guard let buf = await collectResourceData(adjRes, allowNetworkAccess: allowNetworkAccess),
+      let plist = try? PropertyListSerialization.propertyList(from: buf, options: [], format: nil) as? [String: Any]
+    else {
+      return .unknown
+    }
+    let renderTypes = (plist["adjustmentRenderTypes"] as? NSNumber)?.intValue
+    let isUserEdit = renderTypes != nil && renderTypes != kNoEditRenderTypes
+    return isUserEdit ? .edited : .notEdited
+  }
+
+  private func streamBaseResource(
+    resource: PHAssetResource,
+    localId: String,
+    allowNetworkAccess: Bool
+  ) async throws -> BaseResource {
+    let safeId = localId.replacingOccurrences(of: "/", with: "_")
+    let suffix = UTType(resource.uniformTypeIdentifier)?.preferredFilenameExtension ?? "bin"
+    let tempDir = URL(fileURLWithPath: NSTemporaryDirectory(), isDirectory: true)
+      .appendingPathComponent("immich_base", isDirectory: true)
+    try FileManager.default.createDirectory(at: tempDir, withIntermediateDirectories: true)
+
+    let unique = UUID().uuidString.prefix(8)
+    let tempUrl = tempDir.appendingPathComponent("\(safeId)_\(unique)_base.\(suffix)")
+
+    // Write the resource to disk and hash it chunk by chunk, so a big original (e.g.
+    // ProRAW) never sits fully in memory on the upload thread.
+    FileManager.default.createFile(atPath: tempUrl.path, contents: nil)
+    guard let handle = try? FileHandle(forWritingTo: tempUrl) else {
+      throw NSError(
+        domain: "NativeSyncApi",
+        code: -1,
+        userInfo: [NSLocalizedDescriptionKey: "Failed to open temp file for base resource \(localId)"]
+      )
+    }
+
+    var hasher = Insecure.SHA1()
+    var totalBytes: Int64 = 0
+    let options = PHAssetResourceRequestOptions()
+    options.isNetworkAccessAllowed = allowNetworkAccess
+
+    let succeeded = await withCheckedContinuation { (continuation: CheckedContinuation<Bool, Never>) in
+      var writeFailed = false
+      PHAssetResourceManager.default().requestData(
+        for: resource,
+        options: options,
+        dataReceivedHandler: { chunk in
+          if writeFailed { return }
+          do {
+            try handle.write(contentsOf: chunk)
+            hasher.update(data: chunk)
+            totalBytes += Int64(chunk.count)
+          } catch {
+            writeFailed = true
+          }
+        },
+        completionHandler: { error in continuation.resume(returning: error == nil && !writeFailed) }
+      )
+    }
+
+    try? handle.close()
+
+    guard succeeded else {
+      try? FileManager.default.removeItem(at: tempUrl)
+      throw NSError(
+        domain: "NativeSyncApi",
+        code: -1,
+        userInfo: [NSLocalizedDescriptionKey: "Failed to read base resource for \(localId)"]
+      )
+    }
+
+    let sha1 = Data(hasher.finalize()).base64EncodedString()
+    let mime = UTType(resource.uniformTypeIdentifier)?.preferredMIMEType ?? "application/octet-stream"
+    return BaseResource(path: tempUrl.path, sha1: sha1, sizeBytes: totalBytes, mimeType: mime)
+  }
+
+  private static func collectResourceData(
+    _ resource: PHAssetResource,
+    allowNetworkAccess: Bool
+  ) async -> Data? {
+    let options = PHAssetResourceRequestOptions()
+    options.isNetworkAccessAllowed = allowNetworkAccess
+    var buffer = Data()
+    return await withCheckedContinuation { (continuation: CheckedContinuation<Data?, Never>) in
+      PHAssetResourceManager.default().requestData(
+        for: resource,
+        options: options,
+        dataReceivedHandler: { data in buffer.append(data) },
+        completionHandler: { error in continuation.resume(returning: error == nil ? buffer : nil) }
+      )
+    }
+  }
+
 }

mobile/lib/constants/constants.dart

@@ -20,6 +20,7 @@ const String kSecuredPinCode = "secured_pin_code";
 const String kManualUploadGroup = 'manual_upload_group';
 const String kBackupGroup = 'backup_group';
 const String kBackupLivePhotoGroup = 'backup_live_photo_group';
+const String kBackupEditPairGroup = 'backup_edit_pair_group';
 const String kDownloadGroupImage = 'group_image';
 const String kDownloadGroupVideo = 'group_video';
 const String kDownloadGroupLivePhoto = 'group_livephoto';

mobile/lib/domain/models/asset/local_asset.model.dart

@@ -12,6 +12,13 @@ class LocalAsset extends BaseAsset {
   final double? latitude;
   final double? longitude;
 
+  // Remote id of this asset's previous upload; used to stack a new edit under it.
+  final String? priorRemoteId;
+
+  // Local checksum at the last sync action; lets backup skip an already-handled
+  // local whose current render hashes fresh (the iOS revert case).
+  final String? syncedChecksum;
+
   const LocalAsset({
     required this.id,
     String? remoteId,
@@ -32,6 +39,8 @@ class LocalAsset extends BaseAsset {
     this.latitude,
     this.longitude,
     required super.isEdited,
+    this.priorRemoteId,
+    this.syncedChecksum,
   }) : remoteAssetId = remoteId;
 
   @override
@@ -120,6 +129,8 @@ class LocalAsset extends BaseAsset {
     double? latitude,
     double? longitude,
     bool? isEdited,
+    String? priorRemoteId,
+    String? syncedChecksum,
   }) {
     return LocalAsset(
       id: id ?? this.id,
@@ -140,6 +151,8 @@ class LocalAsset extends BaseAsset {
       latitude: latitude ?? this.latitude,
       longitude: longitude ?? this.longitude,
       isEdited: isEdited ?? this.isEdited,
+      priorRemoteId: priorRemoteId ?? this.priorRemoteId,
+      syncedChecksum: syncedChecksum ?? this.syncedChecksum,
     );
   }
 }

mobile/lib/domain/services/edit_revert.service.dart

@@ -0,0 +1,87 @@
+import 'dart:async';
+
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
+import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/stack.repository.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:immich_mobile/repositories/asset_api.repository.dart';
+import 'package:logging/logging.dart';
+
+/// Handles an edit that was reverted in Photos. The local was uploaded as an edit
+/// before but isn't edited now, so flip the stack primary back to the original (via
+/// prior_remote_id) and mark it handled so we don't re-upload the reverted render.
+/// Nothing is trashed; all the edits stay in the stack.
+class EditRevertService {
+  final NativeSyncApi _nativeSyncApi;
+  final DriftStackRepository _stackRepository;
+  final DriftLocalAssetRepository _localAssetRepository;
+  final AssetApiRepository _assetApiRepository;
+  final _log = Logger('EditRevertService');
+
+  EditRevertService({
+    required NativeSyncApi nativeSyncApi,
+    required DriftStackRepository stackRepository,
+    required DriftLocalAssetRepository localAssetRepository,
+    required AssetApiRepository assetApiRepository,
+  }) : _nativeSyncApi = nativeSyncApi,
+       _stackRepository = stackRepository,
+       _localAssetRepository = localAssetRepository,
+       _assetApiRepository = assetApiRepository;
+
+  /// Returns true if the asset was a revert and was handled (caller skips the
+  /// upload); false to fall through to the normal upload path.
+  Future<bool> tryHandleRevert(LocalAsset asset) async {
+    if (asset.priorRemoteId == null) {
+      return false;
+    }
+
+    // Only "not edited" is a revert. `edited` is a fresh edit, so let the pair flow
+    // take it. `unknown` means we couldn't read the adjustment (offloaded to iCloud,
+    // network off); bail there too instead of mistaking an unreadable edit for a
+    // revert and flipping the stack. Network off keeps this a cheap offline read.
+    try {
+      final editState = await _nativeSyncApi.getEditState(asset.id, allowNetworkAccess: false);
+      if (editState != EditState.notEdited) {
+        return false;
+      }
+    } catch (error, stack) {
+      _log.warning("edit-state probe failed for ${asset.id}", error, stack);
+      return false;
+    }
+
+    // It's a revert. Styled photos hit this path because iOS re-encodes the revert to
+    // fresh bytes, so it looks like a new backup candidate and reaches upload.
+    // Non-styled reverts hash back to the base instead, aren't candidates, and get
+    // flipped at hash time in HashService._reconcileReverts. Fresh bytes match nothing
+    // remote, so flip by structure: prior_remote_id is the current primary (the latest
+    // edit), flip it back to the base.
+    final String stackId;
+    final String baseId;
+    try {
+      final foundStack = await _stackRepository.findStackIdByRemoteId(asset.priorRemoteId!);
+      if (foundStack == null) {
+        return false;
+      }
+      final base = await _stackRepository.findStackBaseId(foundStack, excludeId: asset.priorRemoteId!);
+      if (base == null) {
+        return false;
+      }
+      stackId = foundStack;
+      baseId = base;
+    } catch (error, stack) {
+      _log.warning("revert stack lookup failed for ${asset.id}", error, stack);
+      return false;
+    }
+
+    try {
+      await _assetApiRepository.setStackPrimary(stackId, baseId);
+      await _stackRepository.setPrimary(stackId, baseId);
+      await _localAssetRepository.markSynced(asset.id, priorRemoteId: baseId, syncedChecksum: asset.checksum ?? '');
+    } catch (error, stack) {
+      _log.warning("revert primary flip failed for ${asset.id}", error, stack);
+      return false;
+    }
+
+    return true;
+  }
+}

mobile/lib/domain/services/hash.service.dart

@@ -5,8 +5,10 @@ import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/stack.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
 import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:immich_mobile/repositories/asset_api.repository.dart';
 import 'package:logging/logging.dart';
 
 const String _kHashCancelledCode = "HASH_CANCELLED";
@@ -17,6 +19,8 @@ class HashService {
   final DriftLocalAssetRepository _localAssetRepository;
   final DriftTrashedLocalAssetRepository _trashedLocalAssetRepository;
   final NativeSyncApi _nativeSyncApi;
+  final DriftStackRepository _stackRepository;
+  final AssetApiRepository _assetApiRepository;
   final bool Function()? _cancelChecker;
   final _log = Logger('HashService');
 
@@ -25,6 +29,8 @@ class HashService {
     required DriftLocalAssetRepository localAssetRepository,
     required DriftTrashedLocalAssetRepository trashedLocalAssetRepository,
     required NativeSyncApi nativeSyncApi,
+    required DriftStackRepository stackRepository,
+    required AssetApiRepository assetApiRepository,
     bool Function()? cancelChecker,
     int? batchSize,
   }) : _localAlbumRepository = localAlbumRepository,
@@ -32,6 +38,8 @@ class HashService {
        _trashedLocalAssetRepository = trashedLocalAssetRepository,
        _cancelChecker = cancelChecker,
        _nativeSyncApi = nativeSyncApi,
+       _stackRepository = stackRepository,
+       _assetApiRepository = assetApiRepository,
        _batchSize = batchSize ?? kBatchHashFileLimit;
 
   bool get isCancelled => _cancelChecker?.call() ?? false;
@@ -45,6 +53,7 @@ class HashService {
 
       // Sorted by backupSelection followed by isCloud
       final localAlbums = await _localAlbumRepository.getBackupAlbums();
+      final hashedIds = <String>{};
 
       for (final album in localAlbums) {
         if (isCancelled) {
@@ -54,7 +63,7 @@ class HashService {
 
         final assetsToHash = await _localAlbumRepository.getAssetsToHash(album.id);
         if (assetsToHash.isNotEmpty) {
-          await _hashAssets(album, assetsToHash);
+          await _hashAssets(album, assetsToHash, hashedIds: hashedIds);
         }
       }
       if (CurrentPlatform.isAndroid && localAlbums.isNotEmpty) {
@@ -62,9 +71,18 @@ class HashService {
         final trashedToHash = await _trashedLocalAssetRepository.getAssetsToHash(backupAlbumIds);
         if (trashedToHash.isNotEmpty) {
           final pseudoAlbum = LocalAlbum(id: '-pseudoAlbum', name: 'Trash', updatedAt: DateTime.now());
-          await _hashAssets(pseudoAlbum, trashedToHash, isTrashed: true);
+          await _hashAssets(pseudoAlbum, trashedToHash, isTrashed: true, hashedIds: hashedIds);
         }
       }
+
+      // Revert reconcile for non-styled photos: the reverted edit hashes back to the
+      // original's exact bytes, which are already the stack base, so it's not a backup
+      // candidate and never reaches upload. Flip the primary here. Styled photos
+      // re-encode to fresh bytes and get flipped on the upload path instead
+      // (EditRevertService.tryHandleRevert).
+      if (CurrentPlatform.isIOS && hashedIds.isNotEmpty && !isCancelled) {
+        await _reconcileReverts(hashedIds);
+      }
     } on PlatformException catch (e) {
       if (e.code == _kHashCancelledCode) {
         _log.warning("Hashing cancelled by platform");
@@ -81,7 +99,12 @@ class HashService {
   /// Processes a list of [LocalAsset]s, storing their hash and updating the assets in the DB
   /// with hash for those that were successfully hashed. Hashes are looked up in a table
   /// [LocalAssetHashEntity] by local id. Only missing entries are newly hashed and added to the DB.
-  Future<void> _hashAssets(LocalAlbum album, List<LocalAsset> assetsToHash, {bool isTrashed = false}) async {
+  Future<void> _hashAssets(
+    LocalAlbum album,
+    List<LocalAsset> assetsToHash, {
+    bool isTrashed = false,
+    required Set<String> hashedIds,
+  }) async {
     final toHash = <String, LocalAsset>{};
 
     for (final asset in assetsToHash) {
@@ -92,16 +115,21 @@ class HashService {
 
       toHash[asset.id] = asset;
       if (toHash.length == _batchSize) {
-        await _processBatch(album, toHash, isTrashed);
+        await _processBatch(album, toHash, isTrashed, hashedIds);
         toHash.clear();
       }
     }
 
-    await _processBatch(album, toHash, isTrashed);
+    await _processBatch(album, toHash, isTrashed, hashedIds);
   }
 
   /// Processes a batch of assets.
-  Future<void> _processBatch(LocalAlbum album, Map<String, LocalAsset> toHash, bool isTrashed) async {
+  Future<void> _processBatch(
+    LocalAlbum album,
+    Map<String, LocalAsset> toHash,
+    bool isTrashed,
+    Set<String> hashedIds,
+  ) async {
     if (toHash.isEmpty) {
       return;
     }
@@ -141,5 +169,33 @@ class HashService {
     } else {
       await _localAssetRepository.updateHashes(hashed);
     }
+    hashedIds.addAll(hashed.keys);
+  }
+
+  Future<void> _reconcileReverts(Set<String> localIds) async {
+    final List<StackReconcileTarget> targets;
+    try {
+      targets = await _stackRepository.findRevertReconcileTargets(localIds);
+    } catch (error, stack) {
+      _log.warning("findRevertReconcileTargets failed", error, stack);
+      return;
+    }
+
+    for (final target in targets) {
+      try {
+        await _assetApiRepository.setStackPrimary(target.stackId, target.newPrimaryId);
+        await _stackRepository.setPrimary(target.stackId, target.newPrimaryId);
+        // Roll priorRemoteId forward to the matched member (now the primary) so a
+        // later edit stacks onto THAT (the current render), not the old edit.
+        await _localAssetRepository.markSynced(
+          target.localAssetId,
+          priorRemoteId: target.newPrimaryId,
+          syncedChecksum: target.localAssetChecksum,
+        );
+      } catch (error, stack) {
+        _log.warning("revert reconcile flip failed for stack ${target.stackId}", error, stack);
+        continue;
+      }
+    }
   }
 }

mobile/lib/domain/services/local_sync.service.dart

@@ -9,10 +9,10 @@ import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
-import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
 import 'package:immich_mobile/platform/native_sync_api.g.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/asset_media.repository.dart';
+import 'package:immich_mobile/repositories/permission.repository.dart';
 import 'package:immich_mobile/utils/datetime_helpers.dart';
 import 'package:immich_mobile/utils/diff.dart';
 import 'package:logging/logging.dart';
@@ -23,29 +23,29 @@ class LocalSyncService {
   final DriftLocalAssetRepository _localAssetRepository;
   final NativeSyncApi _nativeSyncApi;
   final DriftTrashedLocalAssetRepository _trashedLocalAssetRepository;
-  final LocalFilesManagerRepository _localFilesManager;
-  final StorageRepository _storageRepository;
+  final AssetMediaRepository _assetMediaRepository;
+  final IPermissionRepository _permissionRepository;
   final Logger _log = Logger("DeviceSyncService");
 
   LocalSyncService({
     required DriftLocalAlbumRepository localAlbumRepository,
     required DriftLocalAssetRepository localAssetRepository,
     required DriftTrashedLocalAssetRepository trashedLocalAssetRepository,
-    required LocalFilesManagerRepository localFilesManager,
-    required StorageRepository storageRepository,
+    required AssetMediaRepository assetMediaRepository,
+    required IPermissionRepository permissionRepository,
     required NativeSyncApi nativeSyncApi,
   }) : _localAlbumRepository = localAlbumRepository,
        _localAssetRepository = localAssetRepository,
        _trashedLocalAssetRepository = trashedLocalAssetRepository,
-       _localFilesManager = localFilesManager,
-       _storageRepository = storageRepository,
+       _assetMediaRepository = assetMediaRepository,
+       _permissionRepository = permissionRepository,
        _nativeSyncApi = nativeSyncApi;
 
   Future<void> sync({bool full = false}) async {
     final Stopwatch stopwatch = Stopwatch()..start();
     try {
       if (CurrentPlatform.isAndroid && Store.get(StoreKey.manageLocalMediaAndroid, false)) {
-        final hasPermission = await _localFilesManager.hasManageMediaPermission();
+        final hasPermission = await _permissionRepository.hasManageMediaPermission();
         if (hasPermission) {
           await _syncTrashedAssets();
         } else {
@@ -373,7 +373,7 @@ class LocalSyncService {
 
     final assetsToRestore = await _trashedLocalAssetRepository.getToRestore();
     if (assetsToRestore.isNotEmpty) {
-      final restoredIds = await _localFilesManager.restoreAssetsFromTrash(assetsToRestore);
+      final restoredIds = await _assetMediaRepository.restoreAssetsFromTrash(assetsToRestore);
       await _trashedLocalAssetRepository.applyRestoredAssets(restoredIds);
     } else {
       _log.info("syncTrashedAssets, No remote assets found for restoration");
@@ -381,15 +381,15 @@ class LocalSyncService {
 
     final localAssetsToTrash = await _trashedLocalAssetRepository.getToTrash();
     if (localAssetsToTrash.isNotEmpty) {
-      final mediaUrls = await Future.wait(
-        localAssetsToTrash.values
-            .expand((e) => e)
-            .map((localAsset) => _storageRepository.getAssetEntityForAsset(localAsset).then((e) => e?.getMediaUrl())),
-      );
-      _log.info("Moving to trash ${mediaUrls.join(", ")} assets");
-      final result = await _localFilesManager.moveToTrash(mediaUrls.nonNulls.toList());
-      if (result) {
-        await _trashedLocalAssetRepository.trashLocalAsset(localAssetsToTrash);
+      final localIds = localAssetsToTrash.values.expand((assets) => assets).map((asset) => asset.id).toList();
+      _log.info("Moving to trash ${localIds.join(", ")} assets");
+      final movedIds = await _assetMediaRepository.deleteAll(localIds);
+      if (movedIds.isNotEmpty) {
+        final movedAssetsByAlbum = localAssetsToTrash.map(
+          (albumId, assets) => MapEntry(albumId, assets.where((asset) => movedIds.contains(asset.id)).toList()),
+        )..removeWhere((_, assets) => assets.isEmpty);
+
+        await _trashedLocalAssetRepository.trashLocalAsset(movedAssetsByAlbum);
       }
     } else {
       _log.info("syncTrashedAssets, No assets found in backup-enabled albums for move to trash");

mobile/lib/domain/services/sync_stream.service.dart

@@ -9,12 +9,12 @@ import 'package:immich_mobile/domain/models/sync_event.model.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
-import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/sync_api.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/sync_migration.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/sync_stream.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/asset_media.repository.dart';
+import 'package:immich_mobile/repositories/permission.repository.dart';
 import 'package:immich_mobile/services/api.service.dart';
 import 'package:immich_mobile/utils/semver.dart';
 import 'package:logging/logging.dart';
@@ -34,8 +34,8 @@ class SyncStreamService {
   final SyncStreamRepository _syncStreamRepository;
   final DriftLocalAssetRepository _localAssetRepository;
   final DriftTrashedLocalAssetRepository _trashedLocalAssetRepository;
-  final LocalFilesManagerRepository _localFilesManager;
-  final StorageRepository _storageRepository;
+  final AssetMediaRepository _assetMediaRepository;
+  final IPermissionRepository _permissionRepository;
   final SyncMigrationRepository _syncMigrationRepository;
   final ApiService _api;
   final bool Function()? _cancelChecker;
@@ -45,8 +45,8 @@ class SyncStreamService {
     required SyncStreamRepository syncStreamRepository,
     required DriftLocalAssetRepository localAssetRepository,
     required DriftTrashedLocalAssetRepository trashedLocalAssetRepository,
-    required LocalFilesManagerRepository localFilesManager,
-    required StorageRepository storageRepository,
+    required AssetMediaRepository assetMediaRepository,
+    required IPermissionRepository permissionRepository,
     required SyncMigrationRepository syncMigrationRepository,
     required ApiService api,
     bool Function()? cancelChecker,
@@ -54,8 +54,8 @@ class SyncStreamService {
        _syncStreamRepository = syncStreamRepository,
        _localAssetRepository = localAssetRepository,
        _trashedLocalAssetRepository = trashedLocalAssetRepository,
-       _localFilesManager = localFilesManager,
-       _storageRepository = storageRepository,
+       _assetMediaRepository = assetMediaRepository,
+       _permissionRepository = permissionRepository,
        _syncMigrationRepository = syncMigrationRepository,
        _api = api,
        _cancelChecker = cancelChecker;
@@ -500,22 +500,22 @@ class SyncStreamService {
   }
 
   Future<void> _trashLocalAssets(Map<String, List<LocalAsset>> localAssetsToTrash) async {
-    final mediaUrls = await Future.wait(
-      localAssetsToTrash.values
-          .expand((e) => e)
-          .map((localAsset) => _storageRepository.getAssetEntityForAsset(localAsset).then((e) => e?.getMediaUrl())),
-    );
-    _logger.info("Moving to trash ${mediaUrls.join(", ")} assets");
-    final result = await _localFilesManager.moveToTrash(mediaUrls.nonNulls.toList());
-    if (result) {
-      await _trashedLocalAssetRepository.trashLocalAsset(localAssetsToTrash);
+    final localIds = localAssetsToTrash.values.expand((assets) => assets).map((asset) => asset.id).toList();
+    _logger.info("Moving to trash ${localIds.join(", ")} assets");
+    final movedIds = await _assetMediaRepository.deleteAll(localIds);
+    if (movedIds.isNotEmpty) {
+      final movedAssetsByAlbum = localAssetsToTrash.map(
+        (albumId, assets) => MapEntry(albumId, assets.where((asset) => movedIds.contains(asset.id)).toList()),
+      )..removeWhere((_, assets) => assets.isEmpty);
+
+      await _trashedLocalAssetRepository.trashLocalAsset(movedAssetsByAlbum);
     }
   }
 
   Future<void> _applyRemoteRestoreToLocal() async {
     final assetsToRestore = await _trashedLocalAssetRepository.getToRestore();
     if (assetsToRestore.isNotEmpty) {
-      final restoredIds = await _localFilesManager.restoreAssetsFromTrash(assetsToRestore);
+      final restoredIds = await _assetMediaRepository.restoreAssetsFromTrash(assetsToRestore);
       await _trashedLocalAssetRepository.applyRestoredAssets(restoredIds);
     } else {
       _logger.info("No remote assets found for restoration");
@@ -523,7 +523,7 @@ class SyncStreamService {
   }
 
   Future<void> _syncAssetTrashStatus(List<String> remoteIds) async {
-    if (!(await _localFilesManager.hasManageMediaPermission())) {
+    if (!(await _permissionRepository.hasManageMediaPermission())) {
       _logger.warning("Syncing asset trash status cannot proceed because MANAGE_MEDIA permission is missing");
       return;
     }
@@ -533,7 +533,7 @@ class SyncStreamService {
   }
 
   Future<void> _syncAssetDeletion(List<String> remoteIds) async {
-    if (!(await _localFilesManager.hasManageMediaPermission())) {
+    if (!(await _permissionRepository.hasManageMediaPermission())) {
       _logger.warning("Syncing asset deletion cannot proceed because MANAGE_MEDIA permission is missing");
       return;
     }

mobile/lib/domain/utils/background_sync.dart

@@ -81,6 +81,10 @@ class BackgroundSyncManager {
     } on CanceledError {
       // Ignore cancellation errors
     }
+
+    // Stop the local-sync and hash slots too. The revert reconcile runs in the hash
+    // task and shouldn't outlive the session.
+    await cancelLocal();
   }
 
   Future<void> cancelLocal() async {
@@ -186,6 +190,22 @@ class BackgroundSyncManager {
         });
   }
 
+  /// Runs a remote sync guaranteed to observe changes up to now. [syncRemote]
+  /// joins an in-flight sync whose snapshot can pre-date a just-received change
+  /// (e.g. a stack update) and miss it, so wait for any in-flight sync to finish
+  /// first, then run a fresh one.
+  Future<void> runFreshRemoteSync() async {
+    final inflight = _syncTask;
+    if (inflight != null) {
+      try {
+        await inflight.future;
+      } catch (_) {
+        // The in-flight sync's outcome doesn't matter; we only need a fresh one after it.
+      }
+    }
+    await syncRemote();
+  }
+
   Future<void> syncWebsocketBatchV1(List<dynamic> batchData) {
     if (_syncWebsocketTask != null) {
       return _syncWebsocketTask!.future;

mobile/lib/infrastructure/entities/local_asset.entity.dart

@@ -6,6 +6,7 @@ import 'package:immich_mobile/infrastructure/utils/drift_default.mixin.dart';
 
 @TableIndex.sql('CREATE INDEX IF NOT EXISTS idx_local_asset_checksum ON local_asset_entity (checksum)')
 @TableIndex.sql('CREATE INDEX IF NOT EXISTS idx_local_asset_cloud_id ON local_asset_entity (i_cloud_id)')
+@TableIndex.sql('CREATE INDEX IF NOT EXISTS idx_local_asset_prior_remote_id ON local_asset_entity (prior_remote_id)')
 class LocalAssetEntity extends Table with DriftDefaultsMixin, AssetEntityMixin {
   const LocalAssetEntity();
 
@@ -27,6 +28,14 @@ class LocalAssetEntity extends Table with DriftDefaultsMixin, AssetEntityMixin {
 
   IntColumn get playbackStyle => intEnum<AssetPlaybackStyle>().withDefault(const Constant(0))();
 
+  // remote id of the previous upload (iOS edit-pair stacking)
+  TextColumn get priorRemoteId => text().nullable()();
+
+  // local checksum at the last sync action. Lets the backup query skip a local
+  // whose current hash matches nothing remote but is still "handled": the iOS
+  // revert case, where the reverted render hashes fresh but is already reconciled.
+  TextColumn get syncedChecksum => text().nullable()();
+
   @override
   Set<Column> get primaryKey => {id};
 }
@@ -51,5 +60,7 @@ extension LocalAssetEntityDataDomainExtension on LocalAssetEntityData {
     longitude: longitude,
     cloudId: iCloudId,
     isEdited: false,
+    priorRemoteId: priorRemoteId,
+    syncedChecksum: syncedChecksum,
   );
 }

mobile/lib/infrastructure/entities/local_asset.entity.drift.dart

@@ -26,6 +26,8 @@ typedef $$LocalAssetEntityTableCreateCompanionBuilder =
       i0.Value<double?> latitude,
       i0.Value<double?> longitude,
       i0.Value<i2.AssetPlaybackStyle> playbackStyle,
+      i0.Value<String?> priorRemoteId,
+      i0.Value<String?> syncedChecksum,
     });
 typedef $$LocalAssetEntityTableUpdateCompanionBuilder =
     i1.LocalAssetEntityCompanion Function({
@@ -45,6 +47,8 @@ typedef $$LocalAssetEntityTableUpdateCompanionBuilder =
       i0.Value<double?> latitude,
       i0.Value<double?> longitude,
       i0.Value<i2.AssetPlaybackStyle> playbackStyle,
+      i0.Value<String?> priorRemoteId,
+      i0.Value<String?> syncedChecksum,
     });
 
 class $$LocalAssetEntityTableFilterComposer
@@ -141,6 +145,16 @@ class $$LocalAssetEntityTableFilterComposer
     column: $table.playbackStyle,
     builder: (column) => i0.ColumnWithTypeConverterFilters(column),
   );
+
+  i0.ColumnFilters<String> get priorRemoteId => $composableBuilder(
+    column: $table.priorRemoteId,
+    builder: (column) => i0.ColumnFilters(column),
+  );
+
+  i0.ColumnFilters<String> get syncedChecksum => $composableBuilder(
+    column: $table.syncedChecksum,
+    builder: (column) => i0.ColumnFilters(column),
+  );
 }
 
 class $$LocalAssetEntityTableOrderingComposer
@@ -231,6 +245,16 @@ class $$LocalAssetEntityTableOrderingComposer
     column: $table.playbackStyle,
     builder: (column) => i0.ColumnOrderings(column),
   );
+
+  i0.ColumnOrderings<String> get priorRemoteId => $composableBuilder(
+    column: $table.priorRemoteId,
+    builder: (column) => i0.ColumnOrderings(column),
+  );
+
+  i0.ColumnOrderings<String> get syncedChecksum => $composableBuilder(
+    column: $table.syncedChecksum,
+    builder: (column) => i0.ColumnOrderings(column),
+  );
 }
 
 class $$LocalAssetEntityTableAnnotationComposer
@@ -300,6 +324,16 @@ class $$LocalAssetEntityTableAnnotationComposer
     column: $table.playbackStyle,
     builder: (column) => column,
   );
+
+  i0.GeneratedColumn<String> get priorRemoteId => $composableBuilder(
+    column: $table.priorRemoteId,
+    builder: (column) => column,
+  );
+
+  i0.GeneratedColumn<String> get syncedChecksum => $composableBuilder(
+    column: $table.syncedChecksum,
+    builder: (column) => column,
+  );
 }
 
 class $$LocalAssetEntityTableTableManager
@@ -359,6 +393,8 @@ class $$LocalAssetEntityTableTableManager
                 i0.Value<double?> longitude = const i0.Value.absent(),
                 i0.Value<i2.AssetPlaybackStyle> playbackStyle =
                     const i0.Value.absent(),
+                i0.Value<String?> priorRemoteId = const i0.Value.absent(),
+                i0.Value<String?> syncedChecksum = const i0.Value.absent(),
               }) => i1.LocalAssetEntityCompanion(
                 name: name,
                 type: type,
@@ -376,6 +412,8 @@ class $$LocalAssetEntityTableTableManager
                 latitude: latitude,
                 longitude: longitude,
                 playbackStyle: playbackStyle,
+                priorRemoteId: priorRemoteId,
+                syncedChecksum: syncedChecksum,
               ),
           createCompanionCallback:
               ({
@@ -396,6 +434,8 @@ class $$LocalAssetEntityTableTableManager
                 i0.Value<double?> longitude = const i0.Value.absent(),
                 i0.Value<i2.AssetPlaybackStyle> playbackStyle =
                     const i0.Value.absent(),
+                i0.Value<String?> priorRemoteId = const i0.Value.absent(),
+                i0.Value<String?> syncedChecksum = const i0.Value.absent(),
               }) => i1.LocalAssetEntityCompanion.insert(
                 name: name,
                 type: type,
@@ -413,6 +453,8 @@ class $$LocalAssetEntityTableTableManager
                 latitude: latitude,
                 longitude: longitude,
                 playbackStyle: playbackStyle,
+                priorRemoteId: priorRemoteId,
+                syncedChecksum: syncedChecksum,
               ),
           withReferenceMapper: (p0) => p0
               .map((e) => (e.readTable(table), i0.BaseReferences(db, table, e)))
@@ -637,6 +679,28 @@ class $LocalAssetEntityTable extends i3.LocalAssetEntity
       ).withConverter<i2.AssetPlaybackStyle>(
         i1.$LocalAssetEntityTable.$converterplaybackStyle,
       );
+  static const i0.VerificationMeta _priorRemoteIdMeta =
+      const i0.VerificationMeta('priorRemoteId');
+  @override
+  late final i0.GeneratedColumn<String> priorRemoteId =
+      i0.GeneratedColumn<String>(
+        'prior_remote_id',
+        aliasedName,
+        true,
+        type: i0.DriftSqlType.string,
+        requiredDuringInsert: false,
+      );
+  static const i0.VerificationMeta _syncedChecksumMeta =
+      const i0.VerificationMeta('syncedChecksum');
+  @override
+  late final i0.GeneratedColumn<String> syncedChecksum =
+      i0.GeneratedColumn<String>(
+        'synced_checksum',
+        aliasedName,
+        true,
+        type: i0.DriftSqlType.string,
+        requiredDuringInsert: false,
+      );
   @override
   List<i0.GeneratedColumn> get $columns => [
     name,
@@ -655,6 +719,8 @@ class $LocalAssetEntityTable extends i3.LocalAssetEntity
     latitude,
     longitude,
     playbackStyle,
+    priorRemoteId,
+    syncedChecksum,
   ];
   @override
   String get aliasedName => _alias ?? actualTableName;
@@ -759,6 +825,24 @@ class $LocalAssetEntityTable extends i3.LocalAssetEntity
         longitude.isAcceptableOrUnknown(data['longitude']!, _longitudeMeta),
       );
     }
+    if (data.containsKey('prior_remote_id')) {
+      context.handle(
+        _priorRemoteIdMeta,
+        priorRemoteId.isAcceptableOrUnknown(
+          data['prior_remote_id']!,
+          _priorRemoteIdMeta,
+        ),
+      );
+    }
+    if (data.containsKey('synced_checksum')) {
+      context.handle(
+        _syncedChecksumMeta,
+        syncedChecksum.isAcceptableOrUnknown(
+          data['synced_checksum']!,
+          _syncedChecksumMeta,
+        ),
+      );
+    }
     return context;
   }
 
@@ -839,6 +923,14 @@ class $LocalAssetEntityTable extends i3.LocalAssetEntity
           data['${effectivePrefix}playback_style'],
         )!,
       ),
+      priorRemoteId: attachedDatabase.typeMapping.read(
+        i0.DriftSqlType.string,
+        data['${effectivePrefix}prior_remote_id'],
+      ),
+      syncedChecksum: attachedDatabase.typeMapping.read(
+        i0.DriftSqlType.string,
+        data['${effectivePrefix}synced_checksum'],
+      ),
     );
   }
 
@@ -877,6 +969,8 @@ class LocalAssetEntityData extends i0.DataClass
   final double? latitude;
   final double? longitude;
   final i2.AssetPlaybackStyle playbackStyle;
+  final String? priorRemoteId;
+  final String? syncedChecksum;
   const LocalAssetEntityData({
     required this.name,
     required this.type,
@@ -894,6 +988,8 @@ class LocalAssetEntityData extends i0.DataClass
     this.latitude,
     this.longitude,
     required this.playbackStyle,
+    this.priorRemoteId,
+    this.syncedChecksum,
   });
   @override
   Map<String, i0.Expression> toColumns(bool nullToAbsent) {
@@ -938,6 +1034,12 @@ class LocalAssetEntityData extends i0.DataClass
         i1.$LocalAssetEntityTable.$converterplaybackStyle.toSql(playbackStyle),
       );
     }
+    if (!nullToAbsent || priorRemoteId != null) {
+      map['prior_remote_id'] = i0.Variable<String>(priorRemoteId);
+    }
+    if (!nullToAbsent || syncedChecksum != null) {
+      map['synced_checksum'] = i0.Variable<String>(syncedChecksum);
+    }
     return map;
   }
 
@@ -967,6 +1069,8 @@ class LocalAssetEntityData extends i0.DataClass
       playbackStyle: i1.$LocalAssetEntityTable.$converterplaybackStyle.fromJson(
         serializer.fromJson<int>(json['playbackStyle']),
       ),
+      priorRemoteId: serializer.fromJson<String?>(json['priorRemoteId']),
+      syncedChecksum: serializer.fromJson<String?>(json['syncedChecksum']),
     );
   }
   @override
@@ -993,6 +1097,8 @@ class LocalAssetEntityData extends i0.DataClass
       'playbackStyle': serializer.toJson<int>(
         i1.$LocalAssetEntityTable.$converterplaybackStyle.toJson(playbackStyle),
       ),
+      'priorRemoteId': serializer.toJson<String?>(priorRemoteId),
+      'syncedChecksum': serializer.toJson<String?>(syncedChecksum),
     };
   }
 
@@ -1013,6 +1119,8 @@ class LocalAssetEntityData extends i0.DataClass
     i0.Value<double?> latitude = const i0.Value.absent(),
     i0.Value<double?> longitude = const i0.Value.absent(),
     i2.AssetPlaybackStyle? playbackStyle,
+    i0.Value<String?> priorRemoteId = const i0.Value.absent(),
+    i0.Value<String?> syncedChecksum = const i0.Value.absent(),
   }) => i1.LocalAssetEntityData(
     name: name ?? this.name,
     type: type ?? this.type,
@@ -1032,6 +1140,12 @@ class LocalAssetEntityData extends i0.DataClass
     latitude: latitude.present ? latitude.value : this.latitude,
     longitude: longitude.present ? longitude.value : this.longitude,
     playbackStyle: playbackStyle ?? this.playbackStyle,
+    priorRemoteId: priorRemoteId.present
+        ? priorRemoteId.value
+        : this.priorRemoteId,
+    syncedChecksum: syncedChecksum.present
+        ? syncedChecksum.value
+        : this.syncedChecksum,
   );
   LocalAssetEntityData copyWithCompanion(i1.LocalAssetEntityCompanion data) {
     return LocalAssetEntityData(
@@ -1061,6 +1175,12 @@ class LocalAssetEntityData extends i0.DataClass
       playbackStyle: data.playbackStyle.present
           ? data.playbackStyle.value
           : this.playbackStyle,
+      priorRemoteId: data.priorRemoteId.present
+          ? data.priorRemoteId.value
+          : this.priorRemoteId,
+      syncedChecksum: data.syncedChecksum.present
+          ? data.syncedChecksum.value
+          : this.syncedChecksum,
     );
   }
 
@@ -1082,7 +1202,9 @@ class LocalAssetEntityData extends i0.DataClass
           ..write('adjustmentTime: $adjustmentTime, ')
           ..write('latitude: $latitude, ')
           ..write('longitude: $longitude, ')
-          ..write('playbackStyle: $playbackStyle')
+          ..write('playbackStyle: $playbackStyle, ')
+          ..write('priorRemoteId: $priorRemoteId, ')
+          ..write('syncedChecksum: $syncedChecksum')
           ..write(')'))
         .toString();
   }
@@ -1105,6 +1227,8 @@ class LocalAssetEntityData extends i0.DataClass
     latitude,
     longitude,
     playbackStyle,
+    priorRemoteId,
+    syncedChecksum,
   );
   @override
   bool operator ==(Object other) =>
@@ -1125,7 +1249,9 @@ class LocalAssetEntityData extends i0.DataClass
           other.adjustmentTime == this.adjustmentTime &&
           other.latitude == this.latitude &&
           other.longitude == this.longitude &&
-          other.playbackStyle == this.playbackStyle);
+          other.playbackStyle == this.playbackStyle &&
+          other.priorRemoteId == this.priorRemoteId &&
+          other.syncedChecksum == this.syncedChecksum);
 }
 
 class LocalAssetEntityCompanion
@@ -1146,6 +1272,8 @@ class LocalAssetEntityCompanion
   final i0.Value<double?> latitude;
   final i0.Value<double?> longitude;
   final i0.Value<i2.AssetPlaybackStyle> playbackStyle;
+  final i0.Value<String?> priorRemoteId;
+  final i0.Value<String?> syncedChecksum;
   const LocalAssetEntityCompanion({
     this.name = const i0.Value.absent(),
     this.type = const i0.Value.absent(),
@@ -1163,6 +1291,8 @@ class LocalAssetEntityCompanion
     this.latitude = const i0.Value.absent(),
     this.longitude = const i0.Value.absent(),
     this.playbackStyle = const i0.Value.absent(),
+    this.priorRemoteId = const i0.Value.absent(),
+    this.syncedChecksum = const i0.Value.absent(),
   });
   LocalAssetEntityCompanion.insert({
     required String name,
@@ -1181,6 +1311,8 @@ class LocalAssetEntityCompanion
     this.latitude = const i0.Value.absent(),
     this.longitude = const i0.Value.absent(),
     this.playbackStyle = const i0.Value.absent(),
+    this.priorRemoteId = const i0.Value.absent(),
+    this.syncedChecksum = const i0.Value.absent(),
   }) : name = i0.Value(name),
        type = i0.Value(type),
        id = i0.Value(id);
@@ -1201,6 +1333,8 @@ class LocalAssetEntityCompanion
     i0.Expression<double>? latitude,
     i0.Expression<double>? longitude,
     i0.Expression<int>? playbackStyle,
+    i0.Expression<String>? priorRemoteId,
+    i0.Expression<String>? syncedChecksum,
   }) {
     return i0.RawValuesInsertable({
       if (name != null) 'name': name,
@@ -1219,6 +1353,8 @@ class LocalAssetEntityCompanion
       if (latitude != null) 'latitude': latitude,
       if (longitude != null) 'longitude': longitude,
       if (playbackStyle != null) 'playback_style': playbackStyle,
+      if (priorRemoteId != null) 'prior_remote_id': priorRemoteId,
+      if (syncedChecksum != null) 'synced_checksum': syncedChecksum,
     });
   }
 
@@ -1239,6 +1375,8 @@ class LocalAssetEntityCompanion
     i0.Value<double?>? latitude,
     i0.Value<double?>? longitude,
     i0.Value<i2.AssetPlaybackStyle>? playbackStyle,
+    i0.Value<String?>? priorRemoteId,
+    i0.Value<String?>? syncedChecksum,
   }) {
     return i1.LocalAssetEntityCompanion(
       name: name ?? this.name,
@@ -1257,6 +1395,8 @@ class LocalAssetEntityCompanion
       latitude: latitude ?? this.latitude,
       longitude: longitude ?? this.longitude,
       playbackStyle: playbackStyle ?? this.playbackStyle,
+      priorRemoteId: priorRemoteId ?? this.priorRemoteId,
+      syncedChecksum: syncedChecksum ?? this.syncedChecksum,
     );
   }
 
@@ -1317,6 +1457,12 @@ class LocalAssetEntityCompanion
         ),
       );
     }
+    if (priorRemoteId.present) {
+      map['prior_remote_id'] = i0.Variable<String>(priorRemoteId.value);
+    }
+    if (syncedChecksum.present) {
+      map['synced_checksum'] = i0.Variable<String>(syncedChecksum.value);
+    }
     return map;
   }
 
@@ -1338,7 +1484,9 @@ class LocalAssetEntityCompanion
           ..write('adjustmentTime: $adjustmentTime, ')
           ..write('latitude: $latitude, ')
           ..write('longitude: $longitude, ')
-          ..write('playbackStyle: $playbackStyle')
+          ..write('playbackStyle: $playbackStyle, ')
+          ..write('priorRemoteId: $priorRemoteId, ')
+          ..write('syncedChecksum: $syncedChecksum')
           ..write(')'))
         .toString();
   }
@@ -1348,3 +1496,7 @@ i0.Index get idxLocalAssetCloudId => i0.Index(
   'idx_local_asset_cloud_id',
   'CREATE INDEX IF NOT EXISTS idx_local_asset_cloud_id ON local_asset_entity (i_cloud_id)',
 );
+i0.Index get idxLocalAssetPriorRemoteId => i0.Index(
+  'idx_local_asset_prior_remote_id',
+  'CREATE INDEX IF NOT EXISTS idx_local_asset_prior_remote_id ON local_asset_entity (prior_remote_id)',
+);

mobile/lib/infrastructure/entities/merged_asset.drift

@@ -7,7 +7,13 @@ import 'local_album_asset.entity.dart';
 mergedAsset:
 SELECT
 	rae.id as remote_id,
-	(SELECT lae.id FROM local_asset_entity lae WHERE lae.checksum = rae.checksum LIMIT 1) as local_id,
+	-- local_id links a remote to its on-device copy, normally by checksum. A reverted iOS
+	-- edit re-encodes to fresh bytes so the checksum no longer matches, but its
+	-- prior_remote_id still points at this remote, so fall back to that.
+	COALESCE(
+		(SELECT lae.id FROM local_asset_entity lae WHERE lae.checksum = rae.checksum LIMIT 1),
+		(SELECT lae.id FROM local_asset_entity lae WHERE lae.prior_remote_id = rae.id LIMIT 1)
+	) as local_id,
 	rae.name,
 	rae."type",
 	rae.created_at as created_at,
@@ -83,6 +89,13 @@ AND NOT EXISTS (
     INNER JOIN local_album_entity la on laa.album_id = la.id
     WHERE laa.asset_id = lae.id AND la.backup_selection = 2 -- excluded
 )
+-- iOS edit-in-progress / revert: if this local was already uploaded (its
+-- prior_remote_id resolves to a live remote), hide the local tile so the remote
+-- (the edit, or the flipped-back original) is the single source of truth. Kills
+-- the transient 2-tile flicker and stops a reverted local from re-appearing.
+AND NOT EXISTS (
+	SELECT 1 FROM remote_asset_entity rae WHERE rae.id = lae.prior_remote_id AND rae.owner_id IN :user_ids AND rae.deleted_at IS NULL
+)
 ORDER BY created_at DESC
 LIMIT $limit;
 
@@ -136,6 +149,10 @@ FROM
 		INNER JOIN local_album_entity la on laa.album_id = la.id
 		WHERE laa.asset_id = lae.id AND la.backup_selection = 2 -- excluded
 	)
+	-- iOS edit-in-progress / revert: hide a local already represented by a live remote.
+	AND NOT EXISTS (
+		SELECT 1 FROM remote_asset_entity rae WHERE rae.id = lae.prior_remote_id AND rae.owner_id IN :user_ids AND rae.deleted_at IS NULL
+	)
 )
 GROUP BY bucket_date
 ORDER BY bucket_date DESC;

mobile/lib/infrastructure/entities/merged_asset.drift.dart

@@ -29,7 +29,7 @@ class MergedAssetDrift extends i1.ModularAccessor {
     );
     $arrayStartIndex += generatedlimit.amountOfVariables;
     return customSelect(
-      'SELECT rae.id AS remote_id, (SELECT lae.id FROM local_asset_entity AS lae WHERE lae.checksum = rae.checksum LIMIT 1) AS local_id, rae.name, rae.type, rae.created_at AS created_at, rae.updated_at, rae.width, rae.height, rae.duration_ms, rae.is_favorite, rae.thumb_hash, rae.checksum, rae.owner_id, rae.live_photo_video_id, 0 AS orientation, rae.stack_id, NULL AS i_cloud_id, NULL AS latitude, NULL AS longitude, NULL AS adjustmentTime, rae.is_edited, 0 AS playback_style, rae.uploaded_at FROM remote_asset_entity AS rae LEFT JOIN stack_entity AS se ON rae.stack_id = se.id WHERE rae.deleted_at IS NULL AND rae.visibility = 0 AND rae.owner_id IN ($expandeduserIds) AND(rae.stack_id IS NULL OR rae.id = se.primary_asset_id)UNION ALL SELECT NULL AS remote_id, lae.id AS local_id, lae.name, lae.type, lae.created_at AS created_at, lae.updated_at, lae.width, lae.height, lae.duration_ms, lae.is_favorite, NULL AS thumb_hash, lae.checksum, NULL AS owner_id, NULL AS live_photo_video_id, lae.orientation, NULL AS stack_id, lae.i_cloud_id, lae.latitude, lae.longitude, lae.adjustment_time, 0 AS is_edited, lae.playback_style, NULL AS uploaded_at FROM local_asset_entity AS lae WHERE NOT EXISTS (SELECT 1 FROM remote_asset_entity AS rae WHERE rae.checksum = lae.checksum AND rae.owner_id IN ($expandeduserIds)) AND EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 0) AND NOT EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 2) ORDER BY created_at DESC ${generatedlimit.sql}',
+      'SELECT rae.id AS remote_id, COALESCE((SELECT lae.id FROM local_asset_entity AS lae WHERE lae.checksum = rae.checksum LIMIT 1), (SELECT lae.id FROM local_asset_entity AS lae WHERE lae.prior_remote_id = rae.id LIMIT 1)) AS local_id, rae.name, rae.type, rae.created_at AS created_at, rae.updated_at, rae.width, rae.height, rae.duration_ms, rae.is_favorite, rae.thumb_hash, rae.checksum, rae.owner_id, rae.live_photo_video_id, 0 AS orientation, rae.stack_id, NULL AS i_cloud_id, NULL AS latitude, NULL AS longitude, NULL AS adjustmentTime, rae.is_edited, 0 AS playback_style, rae.uploaded_at FROM remote_asset_entity AS rae LEFT JOIN stack_entity AS se ON rae.stack_id = se.id WHERE rae.deleted_at IS NULL AND rae.visibility = 0 AND rae.owner_id IN ($expandeduserIds) AND(rae.stack_id IS NULL OR rae.id = se.primary_asset_id)UNION ALL SELECT NULL AS remote_id, lae.id AS local_id, lae.name, lae.type, lae.created_at AS created_at, lae.updated_at, lae.width, lae.height, lae.duration_ms, lae.is_favorite, NULL AS thumb_hash, lae.checksum, NULL AS owner_id, NULL AS live_photo_video_id, lae.orientation, NULL AS stack_id, lae.i_cloud_id, lae.latitude, lae.longitude, lae.adjustment_time, 0 AS is_edited, lae.playback_style, NULL AS uploaded_at FROM local_asset_entity AS lae WHERE NOT EXISTS (SELECT 1 FROM remote_asset_entity AS rae WHERE rae.checksum = lae.checksum AND rae.owner_id IN ($expandeduserIds)) AND EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 0) AND NOT EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 2) AND NOT EXISTS (SELECT 1 FROM remote_asset_entity AS rae WHERE rae.id = lae.prior_remote_id AND rae.owner_id IN ($expandeduserIds) AND rae.deleted_at IS NULL) ORDER BY created_at DESC ${generatedlimit.sql}',
       variables: [
         for (var $ in userIds) i0.Variable<String>($),
         ...generatedlimit.introducedVariables,
@@ -81,7 +81,7 @@ class MergedAssetDrift extends i1.ModularAccessor {
     final expandeduserIds = $expandVar($arrayStartIndex, userIds.length);
     $arrayStartIndex += userIds.length;
     return customSelect(
-      'SELECT COUNT(*) AS asset_count, bucket_date FROM (SELECT CASE WHEN ?1 = 0 THEN COALESCE(STRFTIME(\'%Y-%m-%d\', rae.local_date_time), STRFTIME(\'%Y-%m-%d\', rae.created_at, \'localtime\')) WHEN ?1 = 1 THEN COALESCE(STRFTIME(\'%Y-%m\', rae.local_date_time), STRFTIME(\'%Y-%m\', rae.created_at, \'localtime\')) END AS bucket_date FROM remote_asset_entity AS rae LEFT JOIN stack_entity AS se ON rae.stack_id = se.id WHERE rae.deleted_at IS NULL AND rae.visibility = 0 AND rae.owner_id IN ($expandeduserIds) AND(rae.stack_id IS NULL OR rae.id = se.primary_asset_id)UNION ALL SELECT CASE WHEN ?1 = 0 THEN STRFTIME(\'%Y-%m-%d\', lae.created_at, \'localtime\') WHEN ?1 = 1 THEN STRFTIME(\'%Y-%m\', lae.created_at, \'localtime\') END AS bucket_date FROM local_asset_entity AS lae WHERE NOT EXISTS (SELECT 1 FROM remote_asset_entity AS rae WHERE rae.checksum = lae.checksum AND rae.owner_id IN ($expandeduserIds)) AND EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 0) AND NOT EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 2)) GROUP BY bucket_date ORDER BY bucket_date DESC',
+      'SELECT COUNT(*) AS asset_count, bucket_date FROM (SELECT CASE WHEN ?1 = 0 THEN COALESCE(STRFTIME(\'%Y-%m-%d\', rae.local_date_time), STRFTIME(\'%Y-%m-%d\', rae.created_at, \'localtime\')) WHEN ?1 = 1 THEN COALESCE(STRFTIME(\'%Y-%m\', rae.local_date_time), STRFTIME(\'%Y-%m\', rae.created_at, \'localtime\')) END AS bucket_date FROM remote_asset_entity AS rae LEFT JOIN stack_entity AS se ON rae.stack_id = se.id WHERE rae.deleted_at IS NULL AND rae.visibility = 0 AND rae.owner_id IN ($expandeduserIds) AND(rae.stack_id IS NULL OR rae.id = se.primary_asset_id)UNION ALL SELECT CASE WHEN ?1 = 0 THEN STRFTIME(\'%Y-%m-%d\', lae.created_at, \'localtime\') WHEN ?1 = 1 THEN STRFTIME(\'%Y-%m\', lae.created_at, \'localtime\') END AS bucket_date FROM local_asset_entity AS lae WHERE NOT EXISTS (SELECT 1 FROM remote_asset_entity AS rae WHERE rae.checksum = lae.checksum AND rae.owner_id IN ($expandeduserIds)) AND EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 0) AND NOT EXISTS (SELECT 1 FROM local_album_asset_entity AS laa INNER JOIN local_album_entity AS la ON laa.album_id = la.id WHERE laa.asset_id = lae.id AND la.backup_selection = 2) AND NOT EXISTS (SELECT 1 FROM remote_asset_entity AS rae WHERE rae.id = lae.prior_remote_id AND rae.owner_id IN ($expandeduserIds) AND rae.deleted_at IS NULL)) GROUP BY bucket_date ORDER BY bucket_date DESC',
       variables: [
         i0.Variable<int>(groupBy),
         for (var $ in userIds) i0.Variable<String>($),

mobile/lib/infrastructure/repositories/backup.repository.dart

@@ -58,7 +58,8 @@ class DriftBackupRepository extends DriftDatabaseRepository {
             INNER JOIN main.local_album_entity la on laa.album_id = la.id
             WHERE laa.asset_id = lae.id
                 AND la.backup_selection = ?3
-        );
+        )
+        AND (lae.synced_checksum IS NULL OR lae.synced_checksum != lae.checksum);
       ''';
 
     final row = await _db
@@ -104,6 +105,10 @@ class DriftBackupRepository extends DriftDatabaseRepository {
                   _db.remoteAssetEntity.checksum.equalsExp(lae.checksum) & _db.remoteAssetEntity.ownerId.equals(userId),
                 ),
             ) &
+            // iOS revert: a reverted local hashes fresh (matches nothing remote),
+            // but if it was already reconciled (syncedChecksum == current checksum)
+            // it's handled, so don't re-queue it as a fresh upload.
+            (lae.syncedChecksum.isNull() | lae.syncedChecksum.equalsExp(lae.checksum).not()) &
             lae.id.isNotInQuery(_getExcludedSubquery()),
       )
       ..orderBy([(localAsset) => OrderingTerm.desc(localAsset.createdAt)]);

mobile/lib/infrastructure/repositories/db.repository.dart

@@ -98,7 +98,7 @@ class Drift extends $Drift {
   }
 
   @override
-  int get schemaVersion => 26;
+  int get schemaVersion => 27;
 
   @override
   MigrationStrategy get migration => MigrationStrategy(
@@ -276,6 +276,11 @@ class Drift extends $Drift {
           from25To26: (m, v26) async {
             await m.addColumn(v26.remoteAssetEntity, v26.remoteAssetEntity.uploadedAt);
           },
+          from26To27: (m, v27) async {
+            await m.addColumn(v27.localAssetEntity, v27.localAssetEntity.priorRemoteId);
+            await m.addColumn(v27.localAssetEntity, v27.localAssetEntity.syncedChecksum);
+            await m.createIndex(v27.idxLocalAssetPriorRemoteId);
+          },
         ),
       );
 

mobile/lib/infrastructure/repositories/db.repository.drift.dart

@@ -112,6 +112,7 @@ abstract class $Drift extends i0.GeneratedDatabase {
     i7.idxLocalAlbumAssetAlbumAsset,
     i4.idxLocalAssetChecksum,
     i4.idxLocalAssetCloudId,
+    i4.idxLocalAssetPriorRemoteId,
     i3.idxStackPrimaryAssetId,
     i2.uQRemoteAssetsOwnerChecksum,
     i2.uQRemoteAssetsOwnerLibraryChecksum,

mobile/lib/infrastructure/repositories/db.repository.steps.dart

@@ -13539,6 +13539,613 @@ i1.GeneratedColumn<String> _column_212(String aliasedName) =>
       type: i1.DriftSqlType.string,
       $customConstraints: 'NULL',
     );
+
+final class Schema27 extends i0.VersionedSchema {
+  Schema27({required super.database}) : super(version: 27);
+  @override
+  late final List<i1.DatabaseSchemaEntity> entities = [
+    userEntity,
+    remoteAssetEntity,
+    stackEntity,
+    localAssetEntity,
+    remoteAlbumEntity,
+    localAlbumEntity,
+    localAlbumAssetEntity,
+    idxLocalAlbumAssetAlbumAsset,
+    idxLocalAssetChecksum,
+    idxLocalAssetCloudId,
+    idxLocalAssetPriorRemoteId,
+    idxStackPrimaryAssetId,
+    uQRemoteAssetsOwnerChecksum,
+    uQRemoteAssetsOwnerLibraryChecksum,
+    idxRemoteAssetChecksum,
+    idxRemoteAssetStackId,
+    idxRemoteAssetOwnerVisibilityDeletedCreated,
+    authUserEntity,
+    userMetadataEntity,
+    partnerEntity,
+    remoteExifEntity,
+    remoteAlbumAssetEntity,
+    remoteAlbumUserEntity,
+    remoteAssetCloudIdEntity,
+    memoryEntity,
+    memoryAssetEntity,
+    personEntity,
+    assetFaceEntity,
+    storeEntity,
+    trashedLocalAssetEntity,
+    assetEditEntity,
+    metadata,
+    idxPartnerSharedWithId,
+    idxLatLng,
+    idxRemoteExifCity,
+    idxRemoteAlbumAssetAlbumAsset,
+    idxRemoteAssetCloudId,
+    idxPersonOwnerId,
+    idxAssetFacePersonId,
+    idxAssetFaceAssetId,
+    idxAssetFaceVisiblePerson,
+    idxTrashedLocalAssetChecksum,
+    idxTrashedLocalAssetAlbum,
+    idxAssetEditAssetId,
+  ];
+  late final Shape33 userEntity = Shape33(
+    source: i0.VersionedTable(
+      entityName: 'user_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_108,
+        _column_109,
+        _column_110,
+        _column_111,
+        _column_112,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape50 remoteAssetEntity = Shape50(
+    source: i0.VersionedTable(
+      entityName: 'remote_asset_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_108,
+        _column_113,
+        _column_114,
+        _column_115,
+        _column_116,
+        _column_117,
+        _column_118,
+        _column_107,
+        _column_119,
+        _column_120,
+        _column_121,
+        _column_122,
+        _column_123,
+        _column_124,
+        _column_212,
+        _column_125,
+        _column_126,
+        _column_127,
+        _column_128,
+        _column_129,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape35 stackEntity = Shape35(
+    source: i0.VersionedTable(
+      entityName: 'stack_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_114,
+        _column_115,
+        _column_121,
+        _column_130,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape51 localAssetEntity = Shape51(
+    source: i0.VersionedTable(
+      entityName: 'local_asset_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_108,
+        _column_113,
+        _column_114,
+        _column_115,
+        _column_116,
+        _column_117,
+        _column_118,
+        _column_107,
+        _column_131,
+        _column_120,
+        _column_132,
+        _column_133,
+        _column_134,
+        _column_135,
+        _column_136,
+        _column_137,
+        _column_213,
+        _column_214,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape48 remoteAlbumEntity = Shape48(
+    source: i0.VersionedTable(
+      entityName: 'remote_album_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_108,
+        _column_138,
+        _column_114,
+        _column_115,
+        _column_139,
+        _column_140,
+        _column_141,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape38 localAlbumEntity = Shape38(
+    source: i0.VersionedTable(
+      entityName: 'local_album_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_108,
+        _column_115,
+        _column_142,
+        _column_143,
+        _column_144,
+        _column_145,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape39 localAlbumAssetEntity = Shape39(
+    source: i0.VersionedTable(
+      entityName: 'local_album_asset_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(asset_id, album_id)'],
+      columns: [_column_146, _column_147, _column_145],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  final i1.Index idxLocalAlbumAssetAlbumAsset = i1.Index(
+    'idx_local_album_asset_album_asset',
+    'CREATE INDEX IF NOT EXISTS idx_local_album_asset_album_asset ON local_album_asset_entity (album_id, asset_id)',
+  );
+  final i1.Index idxLocalAssetChecksum = i1.Index(
+    'idx_local_asset_checksum',
+    'CREATE INDEX IF NOT EXISTS idx_local_asset_checksum ON local_asset_entity (checksum)',
+  );
+  final i1.Index idxLocalAssetCloudId = i1.Index(
+    'idx_local_asset_cloud_id',
+    'CREATE INDEX IF NOT EXISTS idx_local_asset_cloud_id ON local_asset_entity (i_cloud_id)',
+  );
+  final i1.Index idxLocalAssetPriorRemoteId = i1.Index(
+    'idx_local_asset_prior_remote_id',
+    'CREATE INDEX IF NOT EXISTS idx_local_asset_prior_remote_id ON local_asset_entity (prior_remote_id)',
+  );
+  final i1.Index idxStackPrimaryAssetId = i1.Index(
+    'idx_stack_primary_asset_id',
+    'CREATE INDEX IF NOT EXISTS idx_stack_primary_asset_id ON stack_entity (primary_asset_id)',
+  );
+  final i1.Index uQRemoteAssetsOwnerChecksum = i1.Index(
+    'UQ_remote_assets_owner_checksum',
+    'CREATE UNIQUE INDEX IF NOT EXISTS UQ_remote_assets_owner_checksum ON remote_asset_entity (owner_id, checksum) WHERE(library_id IS NULL)',
+  );
+  final i1.Index uQRemoteAssetsOwnerLibraryChecksum = i1.Index(
+    'UQ_remote_assets_owner_library_checksum',
+    'CREATE UNIQUE INDEX IF NOT EXISTS UQ_remote_assets_owner_library_checksum ON remote_asset_entity (owner_id, library_id, checksum) WHERE(library_id IS NOT NULL)',
+  );
+  final i1.Index idxRemoteAssetChecksum = i1.Index(
+    'idx_remote_asset_checksum',
+    'CREATE INDEX IF NOT EXISTS idx_remote_asset_checksum ON remote_asset_entity (checksum)',
+  );
+  final i1.Index idxRemoteAssetStackId = i1.Index(
+    'idx_remote_asset_stack_id',
+    'CREATE INDEX IF NOT EXISTS idx_remote_asset_stack_id ON remote_asset_entity (stack_id)',
+  );
+  final i1.Index idxRemoteAssetOwnerVisibilityDeletedCreated = i1.Index(
+    'idx_remote_asset_owner_visibility_deleted_created',
+    'CREATE INDEX IF NOT EXISTS idx_remote_asset_owner_visibility_deleted_created ON remote_asset_entity (owner_id, visibility, deleted_at, created_at DESC)',
+  );
+  late final Shape40 authUserEntity = Shape40(
+    source: i0.VersionedTable(
+      entityName: 'auth_user_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_108,
+        _column_109,
+        _column_148,
+        _column_110,
+        _column_111,
+        _column_149,
+        _column_150,
+        _column_151,
+        _column_152,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape4 userMetadataEntity = Shape4(
+    source: i0.VersionedTable(
+      entityName: 'user_metadata_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(user_id, "key")'],
+      columns: [_column_153, _column_154, _column_155],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape41 partnerEntity = Shape41(
+    source: i0.VersionedTable(
+      entityName: 'partner_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(shared_by_id, shared_with_id)'],
+      columns: [_column_156, _column_157, _column_158],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape42 remoteExifEntity = Shape42(
+    source: i0.VersionedTable(
+      entityName: 'remote_exif_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(asset_id)'],
+      columns: [
+        _column_159,
+        _column_160,
+        _column_161,
+        _column_162,
+        _column_163,
+        _column_164,
+        _column_117,
+        _column_116,
+        _column_165,
+        _column_166,
+        _column_167,
+        _column_168,
+        _column_135,
+        _column_136,
+        _column_169,
+        _column_170,
+        _column_171,
+        _column_172,
+        _column_173,
+        _column_174,
+        _column_175,
+        _column_176,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape7 remoteAlbumAssetEntity = Shape7(
+    source: i0.VersionedTable(
+      entityName: 'remote_album_asset_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(asset_id, album_id)'],
+      columns: [_column_159, _column_177],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape10 remoteAlbumUserEntity = Shape10(
+    source: i0.VersionedTable(
+      entityName: 'remote_album_user_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(album_id, user_id)'],
+      columns: [_column_177, _column_153, _column_178],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape43 remoteAssetCloudIdEntity = Shape43(
+    source: i0.VersionedTable(
+      entityName: 'remote_asset_cloud_id_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(asset_id)'],
+      columns: [
+        _column_159,
+        _column_179,
+        _column_180,
+        _column_134,
+        _column_135,
+        _column_136,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape44 memoryEntity = Shape44(
+    source: i0.VersionedTable(
+      entityName: 'memory_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_114,
+        _column_115,
+        _column_124,
+        _column_121,
+        _column_113,
+        _column_181,
+        _column_182,
+        _column_183,
+        _column_184,
+        _column_185,
+        _column_186,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape12 memoryAssetEntity = Shape12(
+    source: i0.VersionedTable(
+      entityName: 'memory_asset_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(asset_id, memory_id)'],
+      columns: [_column_159, _column_187],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape45 personEntity = Shape45(
+    source: i0.VersionedTable(
+      entityName: 'person_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_114,
+        _column_115,
+        _column_121,
+        _column_108,
+        _column_188,
+        _column_189,
+        _column_190,
+        _column_191,
+        _column_192,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape46 assetFaceEntity = Shape46(
+    source: i0.VersionedTable(
+      entityName: 'asset_face_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_159,
+        _column_193,
+        _column_194,
+        _column_195,
+        _column_196,
+        _column_197,
+        _column_198,
+        _column_199,
+        _column_200,
+        _column_201,
+        _column_124,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape18 storeEntity = Shape18(
+    source: i0.VersionedTable(
+      entityName: 'store_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [_column_202, _column_203, _column_204],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape47 trashedLocalAssetEntity = Shape47(
+    source: i0.VersionedTable(
+      entityName: 'trashed_local_asset_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id, album_id)'],
+      columns: [
+        _column_108,
+        _column_113,
+        _column_114,
+        _column_115,
+        _column_116,
+        _column_117,
+        _column_118,
+        _column_107,
+        _column_205,
+        _column_131,
+        _column_120,
+        _column_132,
+        _column_206,
+        _column_137,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape32 assetEditEntity = Shape32(
+    source: i0.VersionedTable(
+      entityName: 'asset_edit_entity',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY(id)'],
+      columns: [
+        _column_107,
+        _column_159,
+        _column_207,
+        _column_208,
+        _column_209,
+      ],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  late final Shape49 metadata = Shape49(
+    source: i0.VersionedTable(
+      entityName: 'metadata',
+      withoutRowId: true,
+      isStrict: true,
+      tableConstraints: ['PRIMARY KEY("key")'],
+      columns: [_column_210, _column_211, _column_115],
+      attachedDatabase: database,
+    ),
+    alias: null,
+  );
+  final i1.Index idxPartnerSharedWithId = i1.Index(
+    'idx_partner_shared_with_id',
+    'CREATE INDEX IF NOT EXISTS idx_partner_shared_with_id ON partner_entity (shared_with_id)',
+  );
+  final i1.Index idxLatLng = i1.Index(
+    'idx_lat_lng',
+    'CREATE INDEX IF NOT EXISTS idx_lat_lng ON remote_exif_entity (latitude, longitude)',
+  );
+  final i1.Index idxRemoteExifCity = i1.Index(
+    'idx_remote_exif_city',
+    'CREATE INDEX IF NOT EXISTS idx_remote_exif_city ON remote_exif_entity (city) WHERE city IS NOT NULL',
+  );
+  final i1.Index idxRemoteAlbumAssetAlbumAsset = i1.Index(
+    'idx_remote_album_asset_album_asset',
+    'CREATE INDEX IF NOT EXISTS idx_remote_album_asset_album_asset ON remote_album_asset_entity (album_id, asset_id)',
+  );
+  final i1.Index idxRemoteAssetCloudId = i1.Index(
+    'idx_remote_asset_cloud_id',
+    'CREATE INDEX IF NOT EXISTS idx_remote_asset_cloud_id ON remote_asset_cloud_id_entity (cloud_id)',
+  );
+  final i1.Index idxPersonOwnerId = i1.Index(
+    'idx_person_owner_id',
+    'CREATE INDEX IF NOT EXISTS idx_person_owner_id ON person_entity (owner_id)',
+  );
+  final i1.Index idxAssetFacePersonId = i1.Index(
+    'idx_asset_face_person_id',
+    'CREATE INDEX IF NOT EXISTS idx_asset_face_person_id ON asset_face_entity (person_id)',
+  );
+  final i1.Index idxAssetFaceAssetId = i1.Index(
+    'idx_asset_face_asset_id',
+    'CREATE INDEX IF NOT EXISTS idx_asset_face_asset_id ON asset_face_entity (asset_id)',
+  );
+  final i1.Index idxAssetFaceVisiblePerson = i1.Index(
+    'idx_asset_face_visible_person',
+    'CREATE INDEX IF NOT EXISTS idx_asset_face_visible_person ON asset_face_entity (person_id, asset_id) WHERE is_visible = 1 AND deleted_at IS NULL',
+  );
+  final i1.Index idxTrashedLocalAssetChecksum = i1.Index(
+    'idx_trashed_local_asset_checksum',
+    'CREATE INDEX IF NOT EXISTS idx_trashed_local_asset_checksum ON trashed_local_asset_entity (checksum)',
+  );
+  final i1.Index idxTrashedLocalAssetAlbum = i1.Index(
+    'idx_trashed_local_asset_album',
+    'CREATE INDEX IF NOT EXISTS idx_trashed_local_asset_album ON trashed_local_asset_entity (album_id)',
+  );
+  final i1.Index idxAssetEditAssetId = i1.Index(
+    'idx_asset_edit_asset_id',
+    'CREATE INDEX IF NOT EXISTS idx_asset_edit_asset_id ON asset_edit_entity (asset_id)',
+  );
+}
+
+class Shape51 extends i0.VersionedTable {
+  Shape51({required super.source, required super.alias}) : super.aliased();
+  i1.GeneratedColumn<String> get name =>
+      columnsByName['name']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<int> get type =>
+      columnsByName['type']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<String> get createdAt =>
+      columnsByName['created_at']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<String> get updatedAt =>
+      columnsByName['updated_at']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<int> get width =>
+      columnsByName['width']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<int> get height =>
+      columnsByName['height']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<int> get durationMs =>
+      columnsByName['duration_ms']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<String> get id =>
+      columnsByName['id']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<String> get checksum =>
+      columnsByName['checksum']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<int> get isFavorite =>
+      columnsByName['is_favorite']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<int> get orientation =>
+      columnsByName['orientation']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<String> get iCloudId =>
+      columnsByName['i_cloud_id']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<String> get adjustmentTime =>
+      columnsByName['adjustment_time']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<double> get latitude =>
+      columnsByName['latitude']! as i1.GeneratedColumn<double>;
+  i1.GeneratedColumn<double> get longitude =>
+      columnsByName['longitude']! as i1.GeneratedColumn<double>;
+  i1.GeneratedColumn<int> get playbackStyle =>
+      columnsByName['playback_style']! as i1.GeneratedColumn<int>;
+  i1.GeneratedColumn<String> get priorRemoteId =>
+      columnsByName['prior_remote_id']! as i1.GeneratedColumn<String>;
+  i1.GeneratedColumn<String> get syncedChecksum =>
+      columnsByName['synced_checksum']! as i1.GeneratedColumn<String>;
+}
+
+i1.GeneratedColumn<String> _column_213(String aliasedName) =>
+    i1.GeneratedColumn<String>(
+      'prior_remote_id',
+      aliasedName,
+      true,
+      type: i1.DriftSqlType.string,
+      $customConstraints: 'NULL',
+    );
+i1.GeneratedColumn<String> _column_214(String aliasedName) =>
+    i1.GeneratedColumn<String>(
+      'synced_checksum',
+      aliasedName,
+      true,
+      type: i1.DriftSqlType.string,
+      $customConstraints: 'NULL',
+    );
 i0.MigrationStepWithVersion migrationSteps({
   required Future<void> Function(i1.Migrator m, Schema2 schema) from1To2,
   required Future<void> Function(i1.Migrator m, Schema3 schema) from2To3,
@@ -13565,6 +14172,7 @@ i0.MigrationStepWithVersion migrationSteps({
   required Future<void> Function(i1.Migrator m, Schema24 schema) from23To24,
   required Future<void> Function(i1.Migrator m, Schema25 schema) from24To25,
   required Future<void> Function(i1.Migrator m, Schema26 schema) from25To26,
+  required Future<void> Function(i1.Migrator m, Schema27 schema) from26To27,
 }) {
   return (currentVersion, database) async {
     switch (currentVersion) {
@@ -13693,6 +14301,11 @@ i0.MigrationStepWithVersion migrationSteps({
         final migrator = i1.Migrator(database, schema);
         await from25To26(migrator, schema);
         return 26;
+      case 26:
+        final schema = Schema27(database: database);
+        final migrator = i1.Migrator(database, schema);
+        await from26To27(migrator, schema);
+        return 27;
       default:
         throw ArgumentError.value('Unknown migration from $currentVersion');
     }
@@ -13725,6 +14338,7 @@ i1.OnUpgrade stepByStep({
   required Future<void> Function(i1.Migrator m, Schema24 schema) from23To24,
   required Future<void> Function(i1.Migrator m, Schema25 schema) from24To25,
   required Future<void> Function(i1.Migrator m, Schema26 schema) from25To26,
+  required Future<void> Function(i1.Migrator m, Schema27 schema) from26To27,
 }) => i0.VersionedSchema.stepByStepHelper(
   step: migrationSteps(
     from1To2: from1To2,
@@ -13752,5 +14366,6 @@ i1.OnUpgrade stepByStep({
     from23To24: from23To24,
     from24To25: from24To25,
     from25To26: from25To26,
+    from26To27: from26To27,
   ),
 );

mobile/lib/infrastructure/repositories/local_asset.repository.dart

@@ -64,6 +64,12 @@ class DriftLocalAssetRepository extends DriftDatabaseRepository {
     });
   }
 
+  Future<void> markSynced(String localId, {required String priorRemoteId, required String syncedChecksum}) {
+    return (_db.localAssetEntity.update()..where((e) => e.id.equals(localId))).write(
+      LocalAssetEntityCompanion(priorRemoteId: Value(priorRemoteId), syncedChecksum: Value(syncedChecksum)),
+    );
+  }
+
   Future<void> delete(List<String> ids) {
     if (ids.isEmpty) {
       return Future.value();

mobile/lib/infrastructure/repositories/stack.repository.dart

@@ -1,8 +1,24 @@
+import 'package:collection/collection.dart';
 import 'package:drift/drift.dart';
+import 'package:immich_mobile/constants/constants.dart';
 import 'package:immich_mobile/domain/models/stack.model.dart';
 import 'package:immich_mobile/infrastructure/entities/stack.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
 
+class StackReconcileTarget {
+  final String stackId;
+  final String newPrimaryId;
+  final String localAssetId;
+  final String localAssetChecksum;
+
+  const StackReconcileTarget({
+    required this.stackId,
+    required this.newPrimaryId,
+    required this.localAssetId,
+    required this.localAssetChecksum,
+  });
+}
+
 class DriftStackRepository extends DriftDatabaseRepository {
   final Drift _db;
   const DriftStackRepository(this._db) : super(_db);
@@ -14,6 +30,95 @@ class DriftStackRepository extends DriftDatabaseRepository {
       return stack.toDto();
     }).get();
   }
+
+  // Per local id, find a stack member whose checksum matches the local's current
+  // checksum but isn't the stack primary. That's the revert case: the local hashed
+  // back to the base while the primary still points at the edit.
+  Future<List<StackReconcileTarget>> findRevertReconcileTargets(Iterable<String> localAssetIds) async {
+    final ids = localAssetIds.toSet();
+    if (ids.isEmpty) {
+      return const [];
+    }
+
+    final targets = <StackReconcileTarget>[];
+    for (final slice in ids.slices(kDriftMaxChunk)) {
+      final placeholders = List.filled(slice.length, '?').join(',');
+      final rows = await _db
+          .customSelect(
+            '''
+        SELECT
+          s.id AS stack_id,
+          member.id AS new_primary,
+          local.id AS local_id,
+          local.checksum AS local_checksum
+        FROM local_asset_entity local
+        INNER JOIN remote_asset_entity prior ON prior.id = local.prior_remote_id AND prior.deleted_at IS NULL
+        INNER JOIN stack_entity s ON s.id = prior.stack_id
+        INNER JOIN remote_asset_entity member
+          ON member.stack_id = s.id
+          AND member.checksum = local.checksum
+          AND member.deleted_at IS NULL
+        WHERE local.id IN ($placeholders)
+          AND s.primary_asset_id != member.id
+        ''',
+            variables: slice.map((id) => Variable<String>(id)).toList(),
+            readsFrom: {_db.localAssetEntity, _db.remoteAssetEntity, _db.stackEntity},
+          )
+          .get();
+
+      for (final row in rows) {
+        targets.add(
+          StackReconcileTarget(
+            stackId: row.read<String>('stack_id'),
+            newPrimaryId: row.read<String>('new_primary'),
+            localAssetId: row.read<String>('local_id'),
+            localAssetChecksum: row.read<String>('local_checksum'),
+          ),
+        );
+      }
+    }
+    return targets;
+  }
+
+  // The stack a remote asset belongs to, if any. Used by the revert path to find
+  // the stack from prior_remote_id when the reverted bytes can't be checksum-matched.
+  Future<String?> findStackIdByRemoteId(String remoteId) async {
+    final row = await _db
+        .customSelect(
+          'SELECT stack_id FROM remote_asset_entity WHERE id = ? AND stack_id IS NOT NULL AND deleted_at IS NULL',
+          variables: [Variable<String>(remoteId)],
+          readsFrom: {_db.remoteAssetEntity},
+        )
+        .getSingleOrNull();
+    return row?.read<String?>('stack_id');
+  }
+
+  // The stack's original base member to flip back to on revert: the earliest-
+  // uploaded member that isn't the (latest-edit) prior. The base is uploaded
+  // before its edits, so oldest uploaded_at = the original.
+  Future<String?> findStackBaseId(String stackId, {required String excludeId}) async {
+    final row = await _db
+        .customSelect(
+          '''
+          SELECT id FROM remote_asset_entity
+          WHERE stack_id = ? AND id != ? AND deleted_at IS NULL
+          ORDER BY uploaded_at IS NULL, uploaded_at ASC, id ASC
+          LIMIT 1
+          ''',
+          variables: [Variable<String>(stackId), Variable<String>(excludeId)],
+          readsFrom: {_db.remoteAssetEntity},
+        )
+        .getSingleOrNull();
+    return row?.read<String?>('id');
+  }
+
+  // Optimistic local primary flip so the timeline updates immediately; the
+  // server's stack-update websocket rewrites it shortly after.
+  Future<void> setPrimary(String stackId, String primaryAssetId) {
+    return (_db.stackEntity.update()..where((e) => e.id.equals(stackId))).write(
+      StackEntityCompanion(primaryAssetId: Value(primaryAssetId)),
+    );
+  }
 }
 
 extension on StackEntityData {

mobile/lib/platform/native_sync_api.g.dart

@@ -88,6 +88,8 @@ int _deepHash(Object? value) {
 
 enum PlatformAssetPlaybackStyle { unknown, image, video, imageAnimated, livePhoto, videoLooping }
 
+enum EditState { notEdited, edited, unknown }
+
 class PlatformAsset {
   PlatformAsset({
     required this.id,
@@ -395,6 +397,55 @@ class CloudIdResult {
   int get hashCode => _deepHash(<Object?>[runtimeType, ..._toList()]);
 }
 
+class BaseResource {
+  BaseResource({required this.path, required this.sha1, required this.sizeBytes, required this.mimeType});
+
+  String path;
+
+  String sha1;
+
+  int sizeBytes;
+
+  String mimeType;
+
+  List<Object?> _toList() {
+    return <Object?>[path, sha1, sizeBytes, mimeType];
+  }
+
+  Object encode() {
+    return _toList();
+  }
+
+  static BaseResource decode(Object result) {
+    result as List<Object?>;
+    return BaseResource(
+      path: result[0]! as String,
+      sha1: result[1]! as String,
+      sizeBytes: result[2]! as int,
+      mimeType: result[3]! as String,
+    );
+  }
+
+  @override
+  // ignore: avoid_equals_and_hash_code_on_mutable_classes
+  bool operator ==(Object other) {
+    if (other is! BaseResource || other.runtimeType != runtimeType) {
+      return false;
+    }
+    if (identical(this, other)) {
+      return true;
+    }
+    return _deepEquals(path, other.path) &&
+        _deepEquals(sha1, other.sha1) &&
+        _deepEquals(sizeBytes, other.sizeBytes) &&
+        _deepEquals(mimeType, other.mimeType);
+  }
+
+  @override
+  // ignore: avoid_equals_and_hash_code_on_mutable_classes
+  int get hashCode => _deepHash(<Object?>[runtimeType, ..._toList()]);
+}
+
 class _PigeonCodec extends StandardMessageCodec {
   const _PigeonCodec();
   @override
@@ -405,21 +456,27 @@ class _PigeonCodec extends StandardMessageCodec {
     } else if (value is PlatformAssetPlaybackStyle) {
       buffer.putUint8(129);
       writeValue(buffer, value.index);
-    } else if (value is PlatformAsset) {
+    } else if (value is EditState) {
       buffer.putUint8(130);
-      writeValue(buffer, value.encode());
-    } else if (value is PlatformAlbum) {
+      writeValue(buffer, value.index);
+    } else if (value is PlatformAsset) {
       buffer.putUint8(131);
       writeValue(buffer, value.encode());
-    } else if (value is SyncDelta) {
+    } else if (value is PlatformAlbum) {
       buffer.putUint8(132);
       writeValue(buffer, value.encode());
-    } else if (value is HashResult) {
+    } else if (value is SyncDelta) {
       buffer.putUint8(133);
       writeValue(buffer, value.encode());
-    } else if (value is CloudIdResult) {
+    } else if (value is HashResult) {
       buffer.putUint8(134);
       writeValue(buffer, value.encode());
+    } else if (value is CloudIdResult) {
+      buffer.putUint8(135);
+      writeValue(buffer, value.encode());
+    } else if (value is BaseResource) {
+      buffer.putUint8(136);
+      writeValue(buffer, value.encode());
     } else {
       super.writeValue(buffer, value);
     }
@@ -432,15 +489,20 @@ class _PigeonCodec extends StandardMessageCodec {
         final value = readValue(buffer) as int?;
         return value == null ? null : PlatformAssetPlaybackStyle.values[value];
       case 130:
-        return PlatformAsset.decode(readValue(buffer)!);
+        final value = readValue(buffer) as int?;
+        return value == null ? null : EditState.values[value];
       case 131:
-        return PlatformAlbum.decode(readValue(buffer)!);
+        return PlatformAsset.decode(readValue(buffer)!);
       case 132:
-        return SyncDelta.decode(readValue(buffer)!);
+        return PlatformAlbum.decode(readValue(buffer)!);
       case 133:
-        return HashResult.decode(readValue(buffer)!);
+        return SyncDelta.decode(readValue(buffer)!);
       case 134:
+        return HashResult.decode(readValue(buffer)!);
+      case 135:
         return CloudIdResult.decode(readValue(buffer)!);
+      case 136:
+        return BaseResource.decode(readValue(buffer)!);
       default:
         return super.readValueOfType(type, buffer);
     }
@@ -654,6 +716,25 @@ class NativeSyncApi {
     return (pigeonVar_replyValue! as Map<Object?, Object?>).cast<String, List<PlatformAsset>>();
   }
 
+  Future<bool> restoreFromTrashById(String mediaId, int type) async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.immich_mobile.NativeSyncApi.restoreFromTrashById$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[mediaId, type]);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    final Object? pigeonVar_replyValue = _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: false,
+    );
+    return pigeonVar_replyValue! as bool;
+  }
+
   Future<List<CloudIdResult>> getCloudIdForAssetIds(List<String> assetIds) async {
     final pigeonVar_channelName =
         'dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds$pigeonVar_messageChannelSuffix';
@@ -672,4 +753,42 @@ class NativeSyncApi {
     );
     return (pigeonVar_replyValue! as List<Object?>).cast<CloudIdResult>();
   }
+
+  Future<BaseResource?> getBaseResource(String assetId, {bool allowNetworkAccess = false}) async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.immich_mobile.NativeSyncApi.getBaseResource$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[assetId, allowNetworkAccess]);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    final Object? pigeonVar_replyValue = _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: true,
+    );
+    return pigeonVar_replyValue as BaseResource?;
+  }
+
+  Future<EditState> getEditState(String assetId, {bool allowNetworkAccess = false}) async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.immich_mobile.NativeSyncApi.getEditState$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[assetId, allowNetworkAccess]);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    final Object? pigeonVar_replyValue = _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: false,
+    );
+    return pigeonVar_replyValue! as EditState;
+  }
 }

mobile/lib/platform/permission_api.g.dart

@@ -0,0 +1,119 @@
+// Autogenerated from Pigeon (v26.3.4), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+// ignore_for_file: unused_import, unused_shown_name
+// ignore_for_file: type=lint
+
+import 'dart:async';
+import 'dart:typed_data' show Float64List, Int32List, Int64List;
+
+import 'package:flutter/services.dart';
+import 'package:meta/meta.dart' show immutable, protected, visibleForTesting;
+
+Object? _extractReplyValueOrThrow(List<Object?>? replyList, String channelName, {required bool isNullValid}) {
+  if (replyList == null) {
+    throw PlatformException(
+      code: 'channel-error',
+      message: 'Unable to establish connection on channel: "$channelName".',
+    );
+  } else if (replyList.length > 1) {
+    throw PlatformException(code: replyList[0]! as String, message: replyList[1] as String?, details: replyList[2]);
+  } else if (!isNullValid && (replyList.isNotEmpty && replyList[0] == null)) {
+    throw PlatformException(
+      code: 'null-error',
+      message: 'Host platform returned null value for non-null return value.',
+    );
+  }
+  return replyList.firstOrNull;
+}
+
+class _PigeonCodec extends StandardMessageCodec {
+  const _PigeonCodec();
+  @override
+  void writeValue(WriteBuffer buffer, Object? value) {
+    if (value is int) {
+      buffer.putUint8(4);
+      buffer.putInt64(value);
+    } else {
+      super.writeValue(buffer, value);
+    }
+  }
+
+  @override
+  Object? readValueOfType(int type, ReadBuffer buffer) {
+    switch (type) {
+      default:
+        return super.readValueOfType(type, buffer);
+    }
+  }
+}
+
+class PermissionApi {
+  /// Constructor for [PermissionApi].  The [binaryMessenger] named argument is
+  /// available for dependency injection.  If it is left null, the default
+  /// BinaryMessenger will be used which routes to the host platform.
+  PermissionApi({BinaryMessenger? binaryMessenger, String messageChannelSuffix = ''})
+    : pigeonVar_binaryMessenger = binaryMessenger,
+      pigeonVar_messageChannelSuffix = messageChannelSuffix.isNotEmpty ? '.$messageChannelSuffix' : '';
+  final BinaryMessenger? pigeonVar_binaryMessenger;
+
+  static const MessageCodec<Object?> pigeonChannelCodec = _PigeonCodec();
+
+  final String pigeonVar_messageChannelSuffix;
+
+  Future<bool> hasManageMediaPermission() async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.immich_mobile.PermissionApi.hasManageMediaPermission$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    final Object? pigeonVar_replyValue = _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: false,
+    );
+    return pigeonVar_replyValue! as bool;
+  }
+
+  Future<bool> requestManageMediaPermission() async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.immich_mobile.PermissionApi.requestManageMediaPermission$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    final Object? pigeonVar_replyValue = _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: false,
+    );
+    return pigeonVar_replyValue! as bool;
+  }
+
+  Future<bool> manageMediaPermission() async {
+    final pigeonVar_channelName =
+        'dev.flutter.pigeon.immich_mobile.PermissionApi.manageMediaPermission$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+
+    final Object? pigeonVar_replyValue = _extractReplyValueOrThrow(
+      pigeonVar_replyList,
+      pigeonVar_channelName,
+      isNullValid: false,
+    );
+    return pigeonVar_replyValue! as bool;
+  }
+}

mobile/lib/providers/infrastructure/platform.provider.dart

@@ -3,9 +3,10 @@ import 'package:immich_mobile/domain/services/background_worker.service.dart';
 import 'package:immich_mobile/platform/background_worker_api.g.dart';
 import 'package:immich_mobile/platform/background_worker_lock_api.g.dart';
 import 'package:immich_mobile/platform/connectivity_api.g.dart';
-import 'package:immich_mobile/platform/native_sync_api.g.dart';
 import 'package:immich_mobile/platform/local_image_api.g.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
 import 'package:immich_mobile/platform/network_api.g.dart';
+import 'package:immich_mobile/platform/permission_api.g.dart';
 import 'package:immich_mobile/platform/remote_image_api.g.dart';
 
 final backgroundWorkerFgServiceProvider = Provider((_) => BackgroundWorkerFgService(BackgroundWorkerFgHostApi()));
@@ -16,6 +17,8 @@ final backgroundWorkerLockServiceProvider = Provider<BackgroundWorkerLockService
 
 final nativeSyncApiProvider = Provider<NativeSyncApi>((_) => NativeSyncApi());
 
+final permissionApiProvider = Provider<PermissionApi>((_) => PermissionApi());
+
 final connectivityApiProvider = Provider<ConnectivityApi>((_) => ConnectivityApi());
 
 final localImageApi = LocalImageApi();

mobile/lib/providers/infrastructure/sync.provider.dart

@@ -1,4 +1,5 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/domain/services/edit_revert.service.dart';
 import 'package:immich_mobile/domain/services/hash.service.dart';
 import 'package:immich_mobile/domain/services/local_sync.service.dart';
 import 'package:immich_mobile/domain/services/sync_stream.service.dart';
@@ -11,8 +12,10 @@ import 'package:immich_mobile/providers/infrastructure/asset.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/cancel.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/db.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
-import 'package:immich_mobile/providers/infrastructure/storage.provider.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/providers/infrastructure/stack.provider.dart';
+import 'package:immich_mobile/repositories/asset_api.repository.dart';
+import 'package:immich_mobile/repositories/asset_media.repository.dart';
+import 'package:immich_mobile/repositories/permission.repository.dart';
 
 final syncMigrationRepositoryProvider = Provider((ref) => SyncMigrationRepository(ref.watch(driftProvider)));
 
@@ -22,8 +25,8 @@ final syncStreamServiceProvider = Provider(
     syncStreamRepository: ref.watch(syncStreamRepositoryProvider),
     localAssetRepository: ref.watch(localAssetRepository),
     trashedLocalAssetRepository: ref.watch(trashedLocalAssetRepository),
-    localFilesManager: ref.watch(localFilesManagerRepositoryProvider),
-    storageRepository: ref.watch(storageRepositoryProvider),
+    assetMediaRepository: ref.watch(assetMediaRepositoryProvider),
+    permissionRepository: ref.watch(permissionRepositoryProvider),
     syncMigrationRepository: ref.watch(syncMigrationRepositoryProvider),
     api: ref.watch(apiServiceProvider),
     cancelChecker: ref.watch(cancellationProvider),
@@ -39,17 +42,28 @@ final localSyncServiceProvider = Provider(
     localAlbumRepository: ref.watch(localAlbumRepository),
     localAssetRepository: ref.watch(localAssetRepository),
     trashedLocalAssetRepository: ref.watch(trashedLocalAssetRepository),
-    localFilesManager: ref.watch(localFilesManagerRepositoryProvider),
-    storageRepository: ref.watch(storageRepositoryProvider),
+    assetMediaRepository: ref.watch(assetMediaRepositoryProvider),
+    permissionRepository: ref.watch(permissionRepositoryProvider),
     nativeSyncApi: ref.watch(nativeSyncApiProvider),
   ),
 );
 
+final editRevertServiceProvider = Provider(
+  (ref) => EditRevertService(
+    nativeSyncApi: ref.watch(nativeSyncApiProvider),
+    stackRepository: ref.watch(driftStackProvider),
+    localAssetRepository: ref.watch(localAssetRepository),
+    assetApiRepository: ref.watch(assetApiRepositoryProvider),
+  ),
+);
+
 final hashServiceProvider = Provider(
   (ref) => HashService(
     localAlbumRepository: ref.watch(localAlbumRepository),
     localAssetRepository: ref.watch(localAssetRepository),
     nativeSyncApi: ref.watch(nativeSyncApiProvider),
     trashedLocalAssetRepository: ref.watch(trashedLocalAssetRepository),
+    stackRepository: ref.watch(driftStackProvider),
+    assetApiRepository: ref.watch(assetApiRepositoryProvider),
   ),
 );

mobile/lib/providers/websocket.provider.dart

@@ -105,6 +105,7 @@ class WebsocketNotifier extends StateNotifier<WebsocketState> {
         socket.on('AssetEditReadyV2', _handleSyncAssetEditReadyV2);
         socket.on('on_config_update', _handleOnConfigUpdate);
         socket.on('on_new_release', _handleReleaseUpdates);
+        socket.on('on_asset_stack_update', _handleAssetStackUpdate);
       } catch (e) {
         dPrint(() => "[WEBSOCKET] Catch Websocket Error - ${e.toString()}");
       }
@@ -188,6 +189,13 @@ class WebsocketNotifier extends StateNotifier<WebsocketState> {
     unawaited(_ref.read(backgroundSyncProvider).syncWebsocketEditV2(data));
   }
 
+  // Server stacked/restacked assets (e.g. an edit stacked onto its original).
+  // Pull a fresh remote sync so the stack_entity lands and the timeline shows
+  // the stacked primary instead of briefly hiding the asset.
+  void _handleAssetStackUpdate(dynamic _) {
+    unawaited(_ref.read(backgroundSyncProvider).runFreshRemoteSync());
+  }
+
   void _processBatchedAssetUploadReadyV1() {
     if (_batchedAssetUploadReady.isEmpty) {
       return;

mobile/lib/repositories/asset_api.repository.dart

@@ -67,6 +67,10 @@ class AssetApiRepository extends ApiRepository {
     return _stacksApi.deleteStacks(BulkIdsDto(ids: ids));
   }
 
+  Future<void> setStackPrimary(String stackId, String primaryAssetId) async {
+    await _stacksApi.updateStack(stackId, StackUpdateDto(primaryAssetId: primaryAssetId));
+  }
+
   Future<Response> downloadAsset(String id, {required bool edited}) {
     return _api.downloadAssetWithHttpInfo(id, edited: edited);
   }

mobile/lib/repositories/asset_media.repository.dart

@@ -8,19 +8,24 @@ import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/extensions/response_extensions.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
 import 'package:immich_mobile/repositories/asset_api.repository.dart';
 import 'package:logging/logging.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:photo_manager/photo_manager.dart';
 import 'package:share_plus/share_plus.dart';
 
-final assetMediaRepositoryProvider = Provider((ref) => AssetMediaRepository(ref.watch(assetApiRepositoryProvider)));
+final assetMediaRepositoryProvider = Provider(
+  (ref) => AssetMediaRepository(ref.watch(assetApiRepositoryProvider), ref.watch(nativeSyncApiProvider)),
+);
 
 class AssetMediaRepository {
   final AssetApiRepository _assetApiRepository;
+  final NativeSyncApi _nativeSyncApi;
   static final Logger _log = Logger("AssetMediaRepository");
 
-  const AssetMediaRepository(this._assetApiRepository);
+  const AssetMediaRepository(this._assetApiRepository, this._nativeSyncApi);
 
   Future<bool> _androidSupportsTrash() async {
     if (Platform.isAndroid) {
@@ -45,6 +50,27 @@ class AssetMediaRepository {
     return PhotoManager.editor.deleteWithIds(ids);
   }
 
+  Future<bool> _restoreFromTrashById(String mediaId, int type) async {
+    try {
+      return await _nativeSyncApi.restoreFromTrashById(mediaId, type);
+    } catch (e, s) {
+      _log.warning('Error restore file from trash by Id', e, s);
+      return false;
+    }
+  }
+
+  Future<List<String>> restoreAssetsFromTrash(Iterable<LocalAsset> assets) async {
+    final restoredIds = <String>[];
+    for (final asset in assets) {
+      _log.info("Restoring from trash, localId: ${asset.id}, checksum: ${asset.checksum}");
+      final result = await _restoreFromTrashById(asset.id, asset.type.index);
+      if (result) {
+        restoredIds.add(asset.id);
+      }
+    }
+    return restoredIds;
+  }
+
   Future<AssetEntity?> get(String id) async {
     final entity = await AssetEntity.fromId(id);
     return entity;

mobile/lib/repositories/local_files_manager.repository.dart

@@ -1,51 +0,0 @@
-import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
-import 'package:immich_mobile/services/local_files_manager.service.dart';
-import 'package:logging/logging.dart';
-
-final localFilesManagerRepositoryProvider = Provider(
-  (ref) => LocalFilesManagerRepository(ref.watch(localFileManagerServiceProvider)),
-);
-
-class LocalFilesManagerRepository {
-  LocalFilesManagerRepository(this._service);
-
-  final Logger _logger = Logger('LocalFilesManagerRepo');
-  final LocalFilesManagerService _service;
-
-  Future<bool> moveToTrash(List<String> mediaUrls) async {
-    return await _service.moveToTrash(mediaUrls);
-  }
-
-  Future<bool> restoreFromTrash(String fileName, int type) async {
-    return await _service.restoreFromTrash(fileName, type);
-  }
-
-  Future<bool> requestManageMediaPermission() async {
-    return await _service.requestManageMediaPermission();
-  }
-
-  Future<bool> hasManageMediaPermission() async {
-    return await _service.hasManageMediaPermission();
-  }
-
-  Future<bool> manageMediaPermission() async {
-    return await _service.manageMediaPermission();
-  }
-
-  Future<List<String>> restoreAssetsFromTrash(Iterable<LocalAsset> assets) async {
-    final restoredIds = <String>[];
-    for (final asset in assets) {
-      _logger.info("Restoring from trash, localId: ${asset.id}, remoteId: ${asset.checksum}");
-      try {
-        final result = await _service.restoreFromTrashById(asset.id, asset.type.index);
-        if (result) {
-          restoredIds.add(asset.id);
-        }
-      } catch (e) {
-        _logger.warning("Restoring failure: $e");
-      }
-    }
-    return restoredIds;
-  }
-}

mobile/lib/repositories/permission.repository.dart

@@ -1,12 +1,16 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/platform/permission_api.g.dart';
+import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
 import 'package:permission_handler/permission_handler.dart';
 
-final permissionRepositoryProvider = Provider((_) {
-  return const PermissionRepository();
+final permissionRepositoryProvider = Provider((ref) {
+  return PermissionRepository(ref.watch(permissionApiProvider));
 });
 
 class PermissionRepository implements IPermissionRepository {
-  const PermissionRepository();
+  final PermissionApi _permissionApi;
+
+  const PermissionRepository(this._permissionApi);
 
   @override
   Future<bool> hasLocationWhenInUsePermission() {
@@ -34,6 +38,21 @@ class PermissionRepository implements IPermissionRepository {
   Future<bool> openSettings() {
     return openAppSettings();
   }
+
+  @override
+  Future<bool> hasManageMediaPermission() {
+    return _permissionApi.hasManageMediaPermission();
+  }
+
+  @override
+  Future<bool> requestManageMediaPermission() {
+    return _permissionApi.requestManageMediaPermission();
+  }
+
+  @override
+  Future<bool> manageMediaPermission() {
+    return _permissionApi.manageMediaPermission();
+  }
 }
 
 abstract interface class IPermissionRepository {
@@ -42,4 +61,7 @@ abstract interface class IPermissionRepository {
   Future<bool> hasLocationAlwaysPermission();
   Future<bool> requestLocationAlwaysPermission();
   Future<bool> openSettings();
+  Future<bool> hasManageMediaPermission();
+  Future<bool> requestManageMediaPermission();
+  Future<bool> manageMediaPermission();
 }

mobile/lib/repositories/upload.repository.dart

@@ -30,6 +30,11 @@ class UploadRepository {
       taskStatusCallback: (update) => onUploadStatus?.call(update),
       taskProgressCallback: (update) => onTaskProgress?.call(update),
     );
+    FileDownloader().registerCallbacks(
+      group: kBackupEditPairGroup,
+      taskStatusCallback: (update) => onUploadStatus?.call(update),
+      taskProgressCallback: (update) => onTaskProgress?.call(update),
+    );
     FileDownloader().registerCallbacks(
       group: kManualUploadGroup,
       taskStatusCallback: (update) => onUploadStatus?.call(update),

mobile/lib/services/background_upload.service.dart

@@ -9,17 +9,22 @@ import 'package:immich_mobile/constants/constants.dart';
 import 'package:immich_mobile/domain/models/asset/asset_metadata.model.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/store.model.dart';
+import 'package:immich_mobile/domain/services/edit_revert.service.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/backup.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/metadata.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
 import 'package:immich_mobile/providers/infrastructure/asset.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/storage.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/sync.provider.dart';
 import 'package:immich_mobile/repositories/asset_media.repository.dart';
 import 'package:immich_mobile/repositories/upload.repository.dart';
 import 'package:immich_mobile/services/api.service.dart';
+import 'package:immich_mobile/services/edit_pair.dart';
 import 'package:immich_mobile/utils/debug_print.dart';
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as p;
@@ -31,6 +36,8 @@ final backgroundUploadServiceProvider = Provider((ref) {
     ref.watch(localAssetRepository),
     ref.watch(backupRepositoryProvider),
     ref.watch(assetMediaRepositoryProvider),
+    ref.watch(nativeSyncApiProvider),
+    ref.watch(editRevertServiceProvider),
   );
 
   ref.onDispose(service.dispose);
@@ -43,13 +50,35 @@ class UploadTaskMetadata {
   final bool isLivePhotos;
   final String livePhotoVideoId;
 
-  const UploadTaskMetadata({required this.localAssetId, required this.isLivePhotos, required this.livePhotoVideoId});
+  // Marks the base upload of an edit pair. On completion the chained edit
+  // upload is enqueued with stackParentId = this base's remote id.
+  final bool isEditPair;
 
-  UploadTaskMetadata copyWith({String? localAssetId, bool? isLivePhotos, String? livePhotoVideoId}) {
+  // Path of the native temp file backing this task (the edit base), so it can
+  // be cleaned up on terminal status.
+  final String basePath;
+
+  const UploadTaskMetadata({
+    required this.localAssetId,
+    required this.isLivePhotos,
+    required this.livePhotoVideoId,
+    this.isEditPair = false,
+    this.basePath = '',
+  });
+
+  UploadTaskMetadata copyWith({
+    String? localAssetId,
+    bool? isLivePhotos,
+    String? livePhotoVideoId,
+    bool? isEditPair,
+    String? basePath,
+  }) {
     return UploadTaskMetadata(
       localAssetId: localAssetId ?? this.localAssetId,
       isLivePhotos: isLivePhotos ?? this.isLivePhotos,
       livePhotoVideoId: livePhotoVideoId ?? this.livePhotoVideoId,
+      isEditPair: isEditPair ?? this.isEditPair,
+      basePath: basePath ?? this.basePath,
     );
   }
 
@@ -58,6 +87,8 @@ class UploadTaskMetadata {
       'localAssetId': localAssetId,
       'isLivePhotos': isLivePhotos,
       'livePhotoVideoId': livePhotoVideoId,
+      'isEditPair': isEditPair,
+      'basePath': basePath,
     };
   }
 
@@ -66,6 +97,8 @@ class UploadTaskMetadata {
       localAssetId: map['localAssetId'] as String,
       isLivePhotos: map['isLivePhotos'] as bool,
       livePhotoVideoId: map['livePhotoVideoId'] as String,
+      isEditPair: (map['isEditPair'] as bool?) ?? false,
+      basePath: (map['basePath'] as String?) ?? '',
     );
   }
 
@@ -76,7 +109,7 @@ class UploadTaskMetadata {
 
   @override
   String toString() =>
-      'UploadTaskMetadata(localAssetId: $localAssetId, isLivePhotos: $isLivePhotos, livePhotoVideoId: $livePhotoVideoId)';
+      'UploadTaskMetadata(localAssetId: $localAssetId, isLivePhotos: $isLivePhotos, livePhotoVideoId: $livePhotoVideoId, isEditPair: $isEditPair, basePath: $basePath)';
 
   @override
   bool operator ==(covariant UploadTaskMetadata other) {
@@ -86,11 +119,18 @@ class UploadTaskMetadata {
 
     return other.localAssetId == localAssetId &&
         other.isLivePhotos == isLivePhotos &&
-        other.livePhotoVideoId == livePhotoVideoId;
+        other.livePhotoVideoId == livePhotoVideoId &&
+        other.isEditPair == isEditPair &&
+        other.basePath == basePath;
   }
 
   @override
-  int get hashCode => localAssetId.hashCode ^ isLivePhotos.hashCode ^ livePhotoVideoId.hashCode;
+  int get hashCode =>
+      localAssetId.hashCode ^
+      isLivePhotos.hashCode ^
+      livePhotoVideoId.hashCode ^
+      isEditPair.hashCode ^
+      basePath.hashCode;
 }
 
 /// Service for handling background uploads using iOS URLSession (background_downloader)
@@ -104,6 +144,8 @@ class BackgroundUploadService {
     this._localAssetRepository,
     this._backupRepository,
     this._assetMediaRepository,
+    this._nativeSyncApi,
+    this._editRevertService,
   ) {
     _uploadRepository.onUploadStatus = _onUploadCallback;
     _uploadRepository.onTaskProgress = _onTaskProgressCallback;
@@ -114,6 +156,8 @@ class BackgroundUploadService {
   final DriftLocalAssetRepository _localAssetRepository;
   final DriftBackupRepository _backupRepository;
   final AssetMediaRepository _assetMediaRepository;
+  final NativeSyncApi _nativeSyncApi;
+  final EditRevertService _editRevertService;
   final Logger _logger = Logger('BackgroundUploadService');
 
   final StreamController<TaskStatusUpdate> _taskStatusController = StreamController<TaskStatusUpdate>.broadcast();
@@ -193,10 +237,13 @@ class BackgroundUploadService {
 
     await _storageRepository.clearCache();
     await _uploadRepository.reset(kBackupGroup);
+    await _uploadRepository.reset(kBackupEditPairGroup);
     await _uploadRepository.deleteDatabaseRecords(kBackupGroup);
+    await _uploadRepository.deleteDatabaseRecords(kBackupEditPairGroup);
 
     final activeTasks = await _uploadRepository.getActiveTasks(kBackupGroup);
-    return activeTasks.length;
+    final activeEditTasks = await _uploadRepository.getActiveTasks(kBackupEditPairGroup);
+    return activeTasks.length + activeEditTasks.length;
   }
 
   /// Resume background backup processing
@@ -205,9 +252,20 @@ class BackgroundUploadService {
   }
 
   void _handleTaskStatusUpdate(TaskStatusUpdate update) async {
+    UploadTaskMetadata? metadata;
+    if (update.task.metaData.isNotEmpty) {
+      try {
+        metadata = UploadTaskMetadata.fromJson(update.task.metaData);
+      } catch (_) {
+        metadata = null;
+      }
+    }
+
     switch (update.status) {
       case TaskStatus.complete:
-        unawaited(_handleLivePhoto(update));
+        unawaited(_handleLivePhoto(update, metadata));
+        unawaited(handleEditPair(update, metadata));
+        unawaited(recordPriorRemoteIdOnSuccess(update, metadata));
 
         if (CurrentPlatform.isIOS) {
           try {
@@ -220,19 +278,20 @@ class BackgroundUploadService {
 
         break;
 
+      case TaskStatus.failed:
+      case TaskStatus.canceled:
+      case TaskStatus.notFound:
+        unawaited(_cleanupTempResourceOnFailure(metadata));
+        break;
+
       default:
         break;
     }
   }
 
-  Future<void> _handleLivePhoto(TaskStatusUpdate update) async {
+  Future<void> _handleLivePhoto(TaskStatusUpdate update, UploadTaskMetadata? metadata) async {
     try {
-      if (update.task.metaData.isEmpty || update.task.metaData == '') {
-        return;
-      }
-
-      final metadata = UploadTaskMetadata.fromJson(update.task.metaData);
-      if (!metadata.isLivePhotos) {
+      if (metadata == null || !metadata.isLivePhotos) {
         return;
       }
 
@@ -258,6 +317,143 @@ class BackgroundUploadService {
     }
   }
 
+  /// When an edit-pair base upload finishes, enqueue the edit on top of it
+  /// (stackParentId = the base's new remote id).
+  @visibleForTesting
+  Future<void> handleEditPair(TaskStatusUpdate update, UploadTaskMetadata? metadata) async {
+    try {
+      if (metadata == null || !metadata.isEditPair) {
+        return;
+      }
+      if (metadata.basePath.isNotEmpty) {
+        try {
+          await File(metadata.basePath).delete();
+        } catch (_) {}
+      }
+      final baseRemoteId = _remoteIdFromResponse(update);
+      if (baseRemoteId == null) {
+        return;
+      }
+      final localAsset = await _localAssetRepository.getById(metadata.localAssetId);
+      if (localAsset == null) {
+        return;
+      }
+      final editTask = await getEditUploadTask(localAsset, baseRemoteId);
+      if (editTask != null) {
+        await enqueueTasks([editTask]);
+      }
+    } catch (error, stackTrace) {
+      dPrint(() => "Error handling edit pair task: $error $stackTrace");
+    }
+  }
+
+  /// Saves the uploaded remote id as the asset's priorRemoteId so a later edit
+  /// stacks onto it. Skipped for edit-pair base uploads; the chained edit records it.
+  @visibleForTesting
+  Future<void> recordPriorRemoteIdOnSuccess(TaskStatusUpdate update, UploadTaskMetadata? metadata) async {
+    try {
+      if (metadata == null || metadata.isEditPair || metadata.isLivePhotos || metadata.localAssetId.isEmpty) {
+        return;
+      }
+      final remoteId = _remoteIdFromResponse(update);
+      if (remoteId == null) {
+        return;
+      }
+      final localAsset = await _localAssetRepository.getById(metadata.localAssetId);
+      await _localAssetRepository.markSynced(
+        metadata.localAssetId,
+        priorRemoteId: remoteId,
+        syncedChecksum: localAsset?.checksum ?? '',
+      );
+    } catch (error, stackTrace) {
+      dPrint(() => "Error recording priorRemoteId: $error $stackTrace");
+    }
+  }
+
+  Future<void> _cleanupTempResourceOnFailure(UploadTaskMetadata? metadata) async {
+    if (metadata == null || metadata.basePath.isEmpty) {
+      return;
+    }
+    try {
+      await File(metadata.basePath).delete();
+    } catch (_) {}
+  }
+
+  /// The new asset's remote id from an upload's response body, or null if the
+  /// body is missing/malformed.
+  String? _remoteIdFromResponse(TaskStatusUpdate update) {
+    final body = update.responseBody;
+    if (body == null || body.isEmpty) {
+      return null;
+    }
+    try {
+      return jsonDecode(body)['id'] as String?;
+    } catch (_) {
+      return null;
+    }
+  }
+
+  Future<UploadTask> _buildBaseUploadTask(LocalAsset asset, BaseResource base) async {
+    final metadata = UploadTaskMetadata(
+      localAssetId: asset.id,
+      isLivePhotos: false,
+      livePhotoVideoId: '',
+      isEditPair: true,
+      basePath: base.path,
+    ).toJson();
+
+    // The base is the unedited original (no adjustmentTime); the `_base`
+    // deviceAssetId keeps it distinct from the chained edit task.
+    return buildUploadTask(
+      File(base.path),
+      createdAt: asset.createdAt,
+      modifiedAt: asset.updatedAt,
+      originalFileName: p.setExtension(asset.name, p.extension(base.path)),
+      deviceAssetId: '${asset.id}_base',
+      metadata: metadata,
+      group: kBackupGroup,
+      isFavorite: asset.isFavorite,
+      requiresWiFi: _shouldRequireWiFi(asset),
+      cloudId: asset.cloudId,
+      latitude: asset.latitude?.toString(),
+      longitude: asset.longitude?.toString(),
+    );
+  }
+
+  @visibleForTesting
+  Future<UploadTask?> getEditUploadTask(LocalAsset asset, String stackParentId) async {
+    final entity = await _storageRepository.getAssetEntityForAsset(asset);
+    if (entity == null) {
+      return null;
+    }
+    final file = await _storageRepository.getFileForAsset(asset.id);
+    if (file == null) {
+      return null;
+    }
+
+    final fields = {'stackParentId': stackParentId};
+    final originalFileName = await _assetMediaRepository.getOriginalFilename(asset.id) ?? asset.name;
+    final metadata = UploadTaskMetadata(localAssetId: asset.id, isLivePhotos: false, livePhotoVideoId: '').toJson();
+
+    return buildUploadTask(
+      file,
+      createdAt: asset.createdAt,
+      modifiedAt: asset.updatedAt,
+      originalFileName: originalFileName,
+      deviceAssetId: asset.id,
+      metadata: metadata,
+      fields: fields,
+      group: kBackupEditPairGroup,
+      priority: 0,
+      isFavorite: asset.isFavorite,
+      requiresWiFi: _shouldRequireWiFi(asset),
+      cloudId: asset.cloudId,
+      adjustmentTime: asset.adjustmentTime?.toIso8601String(),
+      latitude: asset.latitude?.toString(),
+      longitude: asset.longitude?.toString(),
+    );
+  }
+
   @visibleForTesting
   Future<UploadTask?> getUploadTask(LocalAsset asset, {String group = kBackupGroup, int? priority}) async {
     final entity = await _storageRepository.getAssetEntityForAsset(asset);
@@ -266,6 +462,24 @@ class BackgroundUploadService {
       return null;
     }
 
+    // iOS edit pair: stack a user edit onto its original. resolveEditPair decides
+    // whether to reuse a prior upload or upload the base first. Live photos skip this.
+    if (!entity.isLivePhoto && CurrentPlatform.isIOS) {
+      // A reverted edit flips the stack back to the original and skips the upload.
+      if (asset.priorRemoteId != null && await _editRevertService.tryHandleRevert(asset)) {
+        return null;
+      }
+      final plan = await resolveEditPair(_nativeSyncApi, asset, log: _logger);
+      switch (plan) {
+        case UploadBaseFirst(:final base):
+          return _buildBaseUploadTask(asset, base);
+        case AbsorbIntoPrior(:final parentId):
+          return getEditUploadTask(asset, parentId);
+        case NoEditPair():
+          break;
+      }
+    }
+
     File? file;
 
     /// iOS LivePhoto has two files: a photo and a video.

mobile/lib/services/edit_pair.dart

@@ -0,0 +1,81 @@
+import 'dart:io';
+
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:logging/logging.dart';
+
+/// What to do with an edited iOS photo when backing it up.
+sealed class EditPairPlan {
+  const EditPairPlan();
+}
+
+/// Not something we stack: not edited, identical bytes, or couldn't read it.
+class NoEditPair extends EditPairPlan {
+  const NoEditPair();
+}
+
+/// Already uploaded before; stack the edit onto that remote id.
+class AbsorbIntoPrior extends EditPairPlan {
+  final String parentId;
+  const AbsorbIntoPrior(this.parentId);
+}
+
+/// Upload the original first; [base] is its temp file.
+class UploadBaseFirst extends EditPairPlan {
+  final BaseResource base;
+  const UploadBaseFirst(this.base);
+}
+
+/// Works out how an edited photo should stack: reuse a prior upload, upload the
+/// original first, or do nothing. Shared by the foreground and background upload
+/// paths. The caller already checked it's iOS and not a live photo.
+///
+/// A photo that was never edited only carries the capture-time Photographic Style,
+/// which iOS stamps at [LocalAsset.createdAt]; a real edit moves [LocalAsset.adjustmentTime]
+/// later. When they match (or there's no adjustment at all) there's nothing to stack, so
+/// we skip the native read. Anything that moved the timestamp (edit, retime, revert) falls
+/// through to [NativeSyncApi.getBaseResource], which reads the adjustment plist and decides.
+Future<EditPairPlan> resolveEditPair(NativeSyncApi nativeSyncApi, LocalAsset asset, {Logger? log}) async {
+  if (asset.priorRemoteId != null) {
+    return AbsorbIntoPrior(asset.priorRemoteId!);
+  }
+
+  if (!_mightBeEdited(asset)) {
+    return const NoEditPair();
+  }
+
+  BaseResource? base;
+  try {
+    base = await nativeSyncApi.getBaseResource(asset.id, allowNetworkAccess: true);
+  } catch (error, stack) {
+    log?.warning(() => "Failed to read base resource for ${asset.id}", error, stack);
+    return const NoEditPair();
+  }
+  if (base == null) {
+    return const NoEditPair();
+  }
+
+  // Identical bytes (e.g. auto-HDR), nothing real to stack. Drop the temp copy.
+  if (base.sha1 == asset.checksum) {
+    try {
+      await File(base.path).delete();
+    } catch (_) {}
+    return const NoEditPair();
+  }
+
+  return UploadBaseFirst(base);
+}
+
+/// iOS stamps the capture-time Photographic Style at the creation time and moves the
+/// adjustment timestamp on any later change. A gap past a small tolerance (capture jitter
+/// is sub-second, real edits are seconds apart) is worth a native check; no adjustment at
+/// all means the photo was never touched.
+bool _mightBeEdited(LocalAsset asset) {
+  final adjustedAt = asset.adjustmentTime;
+  if (adjustedAt == null) {
+    return false;
+  }
+  return adjustedAt.difference(asset.createdAt).inSeconds.abs() > _editTimestampToleranceSeconds;
+}
+
+const _editTimestampToleranceSeconds = 2;

mobile/lib/services/foreground_upload.service.dart

@@ -6,18 +6,24 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/domain/models/asset/asset_metadata.model.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/store.model.dart';
+import 'package:immich_mobile/domain/services/edit_revert.service.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/extensions/network_capability_extensions.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/extensions/translate_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/backup.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/metadata.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/platform/connectivity_api.g.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:immich_mobile/providers/infrastructure/asset.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/storage.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/sync.provider.dart';
 import 'package:immich_mobile/repositories/asset_media.repository.dart';
 import 'package:immich_mobile/repositories/upload.repository.dart';
+import 'package:immich_mobile/services/edit_pair.dart';
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as p;
 import 'package:photo_manager/photo_manager.dart' show PMProgressHandler;
@@ -39,6 +45,9 @@ final foregroundUploadServiceProvider = Provider((ref) {
     ref.watch(backupRepositoryProvider),
     ref.watch(connectivityApiProvider),
     ref.watch(assetMediaRepositoryProvider),
+    ref.watch(nativeSyncApiProvider),
+    ref.watch(localAssetRepository),
+    ref.watch(editRevertServiceProvider),
   );
 });
 
@@ -54,6 +63,9 @@ class ForegroundUploadService {
     this._backupRepository,
     this._connectivityApi,
     this._assetMediaRepository,
+    this._nativeSyncApi,
+    this._localAssetRepository,
+    this._editRevertService,
   );
 
   final UploadRepository _uploadRepository;
@@ -61,6 +73,9 @@ class ForegroundUploadService {
   final DriftBackupRepository _backupRepository;
   final ConnectivityApi _connectivityApi;
   final AssetMediaRepository _assetMediaRepository;
+  final NativeSyncApi _nativeSyncApi;
+  final DriftLocalAssetRepository _localAssetRepository;
+  final EditRevertService _editRevertService;
   final Logger _logger = Logger('ForegroundUploadService');
 
   bool shouldAbortUpload = false;
@@ -250,6 +265,12 @@ class ForegroundUploadService {
         return;
       }
 
+      // A reverted iOS edit flips the stack back to the original and skips the upload.
+      if (CurrentPlatform.isIOS && asset.priorRemoteId != null && await _editRevertService.tryHandleRevert(asset)) {
+        callbacks.onSuccess?.call(asset.localId!, asset.priorRemoteId!);
+        return;
+      }
+
       final isAvailableLocally = await _storageRepository.isAssetAvailableLocally(asset.id);
 
       if (!isAvailableLocally && CurrentPlatform.isIOS) {
@@ -371,6 +392,13 @@ class ForegroundUploadService {
         ]);
       }
 
+      final stackParentId = entity.isLivePhoto
+          ? null
+          : await _maybeUploadBaseResource(asset, Map.of(fields), cancelToken);
+      if (stackParentId != null) {
+        fields['stackParentId'] = stackParentId;
+      }
+
       final onProgress = callbacks.onProgress;
       final result = await _uploadRepository.uploadFile(
         file: file,
@@ -384,6 +412,13 @@ class ForegroundUploadService {
       );
 
       if (result.isSuccess && result.remoteAssetId != null) {
+        unawaited(
+          _localAssetRepository.markSynced(
+            asset.localId!,
+            priorRemoteId: result.remoteAssetId!,
+            syncedChecksum: asset.checksum ?? '',
+          ),
+        );
         callbacks.onSuccess?.call(asset.localId!, result.remoteAssetId!);
       } else if (result.isCancelled) {
         _logger.warning(() => "Backup was cancelled by the user");
@@ -415,6 +450,43 @@ class ForegroundUploadService {
     }
   }
 
+  /// For an edited iOS photo, uploads the original camera bytes and returns its
+  /// remote id to use as the edit's stackParentId. Returns null for non-edits.
+  Future<String?> _maybeUploadBaseResource(
+    LocalAsset asset,
+    Map<String, String> baseFields,
+    Completer<void>? cancelToken,
+  ) async {
+    if (!CurrentPlatform.isIOS) {
+      return null;
+    }
+
+    final plan = await resolveEditPair(_nativeSyncApi, asset, log: _logger);
+    switch (plan) {
+      case NoEditPair():
+        return null;
+      case AbsorbIntoPrior(:final parentId):
+        return parentId;
+      case UploadBaseFirst(:final base):
+        final baseFile = File(base.path);
+        try {
+          final baseName = p.setExtension(asset.name, p.extension(base.path));
+          final result = await _uploadRepository.uploadFile(
+            file: baseFile,
+            originalFileName: baseName,
+            fields: baseFields,
+            cancelToken: cancelToken,
+            logContext: 'baseResource[${asset.localId}]',
+          );
+          return result.isSuccess ? result.remoteAssetId : null;
+        } finally {
+          try {
+            await baseFile.delete();
+          } catch (_) {}
+        }
+    }
+  }
+
   Future<UploadResult> _uploadSingleFile(
     File file, {
     required String deviceAssetId,

mobile/lib/services/local_files_manager.service.dart

@@ -1,66 +0,0 @@
-import 'package:flutter/services.dart';
-import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:logging/logging.dart';
-
-final localFileManagerServiceProvider = Provider<LocalFilesManagerService>((ref) => const LocalFilesManagerService());
-
-class LocalFilesManagerService {
-  const LocalFilesManagerService();
-
-  static final Logger _logger = Logger('LocalFilesManager');
-  static const MethodChannel _channel = MethodChannel('file_trash');
-
-  Future<bool> moveToTrash(List<String> mediaUrls) async {
-    try {
-      return await _channel.invokeMethod('moveToTrash', {'mediaUrls': mediaUrls});
-    } catch (e, s) {
-      _logger.warning('Error moving file to trash', e, s);
-      return false;
-    }
-  }
-
-  Future<bool> restoreFromTrash(String fileName, int type) async {
-    try {
-      return await _channel.invokeMethod('restoreFromTrash', {'fileName': fileName, 'type': type});
-    } catch (e, s) {
-      _logger.warning('Error restore file from trash', e, s);
-      return false;
-    }
-  }
-
-  Future<bool> restoreFromTrashById(String mediaId, int type) async {
-    try {
-      return await _channel.invokeMethod('restoreFromTrash', {'mediaId': mediaId, 'type': type});
-    } catch (e, s) {
-      _logger.warning('Error restore file from trash by Id', e, s);
-      return false;
-    }
-  }
-
-  Future<bool> requestManageMediaPermission() async {
-    try {
-      return await _channel.invokeMethod('requestManageMediaPermission');
-    } catch (e, s) {
-      _logger.warning('Error requesting manage media permission', e, s);
-      return false;
-    }
-  }
-
-  Future<bool> hasManageMediaPermission() async {
-    try {
-      return await _channel.invokeMethod('hasManageMediaPermission');
-    } catch (e, s) {
-      _logger.warning('Error requesting manage media permission state', e, s);
-      return false;
-    }
-  }
-
-  Future<bool> manageMediaPermission() async {
-    try {
-      return await _channel.invokeMethod('manageMediaPermission');
-    } catch (e, s) {
-      _logger.warning('Error requesting manage media permission settings', e, s);
-      return false;
-    }
-  }
-}

mobile/lib/widgets/forms/login/login_form.dart

@@ -22,7 +22,7 @@ import 'package:immich_mobile/providers/gallery_permission.provider.dart';
 import 'package:immich_mobile/providers/oauth.provider.dart';
 import 'package:immich_mobile/providers/server_info.provider.dart';
 import 'package:immich_mobile/providers/websocket.provider.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/permission.repository.dart';
 import 'package:immich_mobile/routing/router.dart';
 import 'package:immich_mobile/utils/provider_utils.dart';
 import 'package:immich_mobile/utils/url_helper.dart';
@@ -193,7 +193,7 @@ class LoginForm extends HookConsumerWidget {
     }
 
     getManageMediaPermission() async {
-      final hasPermission = await ref.read(localFilesManagerRepositoryProvider).hasManageMediaPermission();
+      final hasPermission = await ref.read(permissionRepositoryProvider).hasManageMediaPermission();
       if (!hasPermission) {
         await showDialog(
           context: context,
@@ -224,7 +224,7 @@ class LoginForm extends HookConsumerWidget {
                 ),
                 TextButton(
                   onPressed: () {
-                    ref.read(localFilesManagerRepositoryProvider).requestManageMediaPermission();
+                    unawaited(ref.read(permissionRepositoryProvider).requestManageMediaPermission());
                     Navigator.of(context).pop();
                   },
                   child: Text(

mobile/lib/widgets/settings/advanced_settings.dart

@@ -10,7 +10,7 @@ import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/providers/infrastructure/metadata.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/readonly_mode.provider.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/permission.repository.dart';
 import 'package:immich_mobile/services/app_settings.service.dart';
 import 'package:immich_mobile/utils/bytes_units.dart';
 import 'package:immich_mobile/utils/hooks/app_settings_update_hook.dart';
@@ -57,9 +57,7 @@ class AdvancedSettings extends HookConsumerWidget {
       () async {
         isManageMediaSupported.value = await checkAndroidVersion();
         if (isManageMediaSupported.value) {
-          manageMediaAndroidPermission.value = await ref
-              .read(localFilesManagerRepositoryProvider)
-              .hasManageMediaPermission();
+          manageMediaAndroidPermission.value = await ref.read(permissionRepositoryProvider).hasManageMediaPermission();
         }
       }();
       return null;
@@ -82,7 +80,7 @@ class AdvancedSettings extends HookConsumerWidget {
               subtitle: "advanced_settings_sync_remote_deletions_subtitle".tr(),
               onChanged: (value) async {
                 if (value) {
-                  final result = await ref.read(localFilesManagerRepositoryProvider).requestManageMediaPermission();
+                  final result = await ref.read(permissionRepositoryProvider).requestManageMediaPermission();
                   manageLocalMediaAndroid.value = result;
                   manageMediaAndroidPermission.value = result;
                 }
@@ -96,7 +94,7 @@ class AdvancedSettings extends HookConsumerWidget {
                   ? const Color.fromARGB(255, 243, 188, 106)
                   : null,
               onActionTap: () async {
-                final result = await ref.read(localFilesManagerRepositoryProvider).manageMediaPermission();
+                final result = await ref.read(permissionRepositoryProvider).manageMediaPermission();
                 manageMediaAndroidPermission.value = result;
               },
             ),

mobile/openapi/lib/api/assets_api.dart

@@ -1252,8 +1252,11 @@ class AssetsApi {
   /// * [MultipartFile] sidecarData:
   ///   Sidecar file data
   ///
+  /// * [String] stackParentId:
+  ///   Stack this asset onto the parent asset, with the new asset as the stack primary
+  ///
   /// * [AssetVisibility] visibility:
-  Future<Response> uploadAssetWithHttpInfo(MultipartFile assetData, DateTime fileCreatedAt, DateTime fileModifiedAt, { String? key, String? slug, String? xImmichChecksum, int? duration, String? filename, bool? isFavorite, String? livePhotoVideoId, List<AssetMetadataUpsertItemDto>? metadata, MultipartFile? sidecarData, AssetVisibility? visibility, }) async {
+  Future<Response> uploadAssetWithHttpInfo(MultipartFile assetData, DateTime fileCreatedAt, DateTime fileModifiedAt, { String? key, String? slug, String? xImmichChecksum, int? duration, String? filename, bool? isFavorite, String? livePhotoVideoId, List<AssetMetadataUpsertItemDto>? metadata, MultipartFile? sidecarData, String? stackParentId, AssetVisibility? visibility, }) async {
     // ignore: prefer_const_declarations
     final apiPath = r'/assets';
 
@@ -1317,6 +1320,10 @@ class AssetsApi {
       mp.fields[r'sidecarData'] = sidecarData.field;
       mp.files.add(sidecarData);
     }
+    if (stackParentId != null) {
+      hasFields = true;
+      mp.fields[r'stackParentId'] = parameterToString(stackParentId);
+    }
     if (visibility != null) {
       hasFields = true;
       mp.fields[r'visibility'] = parameterToString(visibility);
@@ -1376,9 +1383,12 @@ class AssetsApi {
   /// * [MultipartFile] sidecarData:
   ///   Sidecar file data
   ///
+  /// * [String] stackParentId:
+  ///   Stack this asset onto the parent asset, with the new asset as the stack primary
+  ///
   /// * [AssetVisibility] visibility:
-  Future<AssetMediaResponseDto?> uploadAsset(MultipartFile assetData, DateTime fileCreatedAt, DateTime fileModifiedAt, { String? key, String? slug, String? xImmichChecksum, int? duration, String? filename, bool? isFavorite, String? livePhotoVideoId, List<AssetMetadataUpsertItemDto>? metadata, MultipartFile? sidecarData, AssetVisibility? visibility, }) async {
-    final response = await uploadAssetWithHttpInfo(assetData, fileCreatedAt, fileModifiedAt,  key: key, slug: slug, xImmichChecksum: xImmichChecksum, duration: duration, filename: filename, isFavorite: isFavorite, livePhotoVideoId: livePhotoVideoId, metadata: metadata, sidecarData: sidecarData, visibility: visibility, );
+  Future<AssetMediaResponseDto?> uploadAsset(MultipartFile assetData, DateTime fileCreatedAt, DateTime fileModifiedAt, { String? key, String? slug, String? xImmichChecksum, int? duration, String? filename, bool? isFavorite, String? livePhotoVideoId, List<AssetMetadataUpsertItemDto>? metadata, MultipartFile? sidecarData, String? stackParentId, AssetVisibility? visibility, }) async {
+    final response = await uploadAssetWithHttpInfo(assetData, fileCreatedAt, fileModifiedAt,  key: key, slug: slug, xImmichChecksum: xImmichChecksum, duration: duration, filename: filename, isFavorite: isFavorite, livePhotoVideoId: livePhotoVideoId, metadata: metadata, sidecarData: sidecarData, stackParentId: stackParentId, visibility: visibility, );
     if (response.statusCode >= HttpStatus.badRequest) {
       throw ApiException(response.statusCode, await _decodeBodyBytes(response));
     }

mobile/pigeon/native_sync_api.dart

@@ -11,14 +11,7 @@ import 'package:pigeon/pigeon.dart';
     dartPackageName: 'immich_mobile',
   ),
 )
-enum PlatformAssetPlaybackStyle {
-  unknown,
-  image,
-  video,
-  imageAnimated,
-  livePhoto,
-  videoLooping,
-}
+enum PlatformAssetPlaybackStyle { unknown, image, video, imageAnimated, livePhoto, videoLooping }
 
 class PlatformAsset {
   final String id;
@@ -110,6 +103,21 @@ class CloudIdResult {
   const CloudIdResult({required this.assetId, this.error, this.cloudId});
 }
 
+class BaseResource {
+  final String path;
+  final String sha1;
+  final int sizeBytes;
+  final String mimeType;
+
+  const BaseResource({required this.path, required this.sha1, required this.sizeBytes, required this.mimeType});
+}
+
+// Whether an iOS asset currently carries a user edit, as opposed to a
+// capture-time Photographic Style or a reverted edit. `unknown` means the
+// adjustment data couldn't be read (e.g. the asset is offloaded to iCloud and
+// network wasn't allowed), so callers must not treat it as "not edited".
+enum EditState { notEdited, edited, unknown }
+
 @HostApi()
 abstract class NativeSyncApi {
   bool shouldFullSync();
@@ -142,6 +150,17 @@ abstract class NativeSyncApi {
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   Map<String, List<PlatformAsset>> getTrashedAssets();
 
+  @async
+  bool restoreFromTrashById(String mediaId, int type);
+
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   List<CloudIdResult> getCloudIdForAssetIds(List<String> assetIds);
+
+  @async
+  @TaskQueue(type: TaskQueueType.serialBackgroundThread)
+  BaseResource? getBaseResource(String assetId, {bool allowNetworkAccess = false});
+
+  @async
+  @TaskQueue(type: TaskQueueType.serialBackgroundThread)
+  EditState getEditState(String assetId, {bool allowNetworkAccess = false});
 }

mobile/pigeon/permission_api.dart

@@ -0,0 +1,23 @@
+import 'package:pigeon/pigeon.dart';
+
+@ConfigurePigeon(
+  PigeonOptions(
+    dartOut: 'lib/platform/permission_api.g.dart',
+    swiftOut: 'ios/Runner/Permission/PermissionApi.g.swift',
+    swiftOptions: SwiftOptions(),
+    kotlinOut: 'android/app/src/main/kotlin/app/alextran/immich/permission/PermissionApi.g.kt',
+    kotlinOptions: KotlinOptions(package: 'app.alextran.immich.permission'),
+    dartOptions: DartOptions(),
+    dartPackageName: 'immich_mobile',
+  ),
+)
+@HostApi()
+abstract class PermissionApi {
+  bool hasManageMediaPermission();
+
+  @async
+  bool requestManageMediaPermission();
+
+  @async
+  bool manageMediaPermission();
+}

mobile/test/domain/service.mock.dart

@@ -1,3 +1,4 @@
+import 'package:immich_mobile/domain/services/edit_revert.service.dart';
 import 'package:immich_mobile/domain/services/store.service.dart';
 import 'package:immich_mobile/domain/utils/background_sync.dart';
 import 'package:immich_mobile/platform/native_sync_api.g.dart';
@@ -11,3 +12,5 @@ class MockBackgroundSyncManager extends Mock implements BackgroundSyncManager {}
 class MockNativeSyncApi extends Mock implements NativeSyncApi {}
 
 class MockAppSettingsService extends Mock implements AppSettingsService {}
+
+class MockEditRevertService extends Mock implements EditRevertService {}

mobile/test/domain/services/local_sync_service_test.dart

@@ -10,17 +10,15 @@ import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
-import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/store.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
 import 'package:immich_mobile/platform/native_sync_api.g.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/asset_media.repository.dart';
 import 'package:mocktail/mocktail.dart';
 
 import '../../domain/service.mock.dart';
 import '../../fixtures/asset.stub.dart';
 import '../../infrastructure/repository.mock.dart';
-import '../../mocks/asset_entity.mock.dart';
 import '../../repository.mocks.dart';
 
 void main() {
@@ -28,8 +26,8 @@ void main() {
   late DriftLocalAlbumRepository mockLocalAlbumRepository;
   late DriftLocalAssetRepository mockLocalAssetRepository;
   late DriftTrashedLocalAssetRepository mockTrashedLocalAssetRepository;
-  late LocalFilesManagerRepository mockLocalFilesManager;
-  late StorageRepository mockStorageRepository;
+  late AssetMediaRepository mockAssetMediaRepository;
+  late MockPermissionRepository mockPermissionRepository;
   late MockNativeSyncApi mockNativeSyncApi;
   late Drift db;
 
@@ -51,8 +49,8 @@ void main() {
     mockLocalAlbumRepository = MockLocalAlbumRepository();
     mockLocalAssetRepository = MockLocalAssetRepository();
     mockTrashedLocalAssetRepository = MockTrashedLocalAssetRepository();
-    mockLocalFilesManager = MockLocalFilesManagerRepository();
-    mockStorageRepository = MockStorageRepository();
+    mockAssetMediaRepository = MockAssetMediaRepository();
+    mockPermissionRepository = MockPermissionRepository();
     mockNativeSyncApi = MockNativeSyncApi();
 
     when(() => mockNativeSyncApi.shouldFullSync()).thenAnswer((_) async => false);
@@ -65,25 +63,28 @@ void main() {
     when(() => mockTrashedLocalAssetRepository.getToTrash()).thenAnswer((_) async => {});
     when(() => mockTrashedLocalAssetRepository.applyRestoredAssets(any())).thenAnswer((_) async {});
     when(() => mockTrashedLocalAssetRepository.trashLocalAsset(any())).thenAnswer((_) async {});
-    when(() => mockLocalFilesManager.moveToTrash(any<List<String>>())).thenAnswer((_) async => true);
+    when(() => mockAssetMediaRepository.deleteAll(any())).thenAnswer((invocation) async {
+      final ids = invocation.positionalArguments.first as List<String>;
+      return ids;
+    });
 
     sut = LocalSyncService(
       localAlbumRepository: mockLocalAlbumRepository,
       localAssetRepository: mockLocalAssetRepository,
       trashedLocalAssetRepository: mockTrashedLocalAssetRepository,
-      localFilesManager: mockLocalFilesManager,
-      storageRepository: mockStorageRepository,
+      assetMediaRepository: mockAssetMediaRepository,
+      permissionRepository: mockPermissionRepository,
       nativeSyncApi: mockNativeSyncApi,
     );
 
     await Store.put(StoreKey.manageLocalMediaAndroid, false);
-    when(() => mockLocalFilesManager.hasManageMediaPermission()).thenAnswer((_) async => false);
+    when(() => mockPermissionRepository.hasManageMediaPermission()).thenAnswer((_) async => false);
   });
 
   group('LocalSyncService - syncTrashedAssets gating', () {
     test('invokes syncTrashedAssets when Android flag enabled and permission granted', () async {
       await Store.put(StoreKey.manageLocalMediaAndroid, true);
-      when(() => mockLocalFilesManager.hasManageMediaPermission()).thenAnswer((_) async => true);
+      when(() => mockPermissionRepository.hasManageMediaPermission()).thenAnswer((_) async => true);
 
       await sut.sync();
 
@@ -93,7 +94,7 @@ void main() {
 
     test('skips syncTrashedAssets when store flag disabled', () async {
       await Store.put(StoreKey.manageLocalMediaAndroid, false);
-      when(() => mockLocalFilesManager.hasManageMediaPermission()).thenAnswer((_) async => true);
+      when(() => mockPermissionRepository.hasManageMediaPermission()).thenAnswer((_) async => true);
 
       await sut.sync();
 
@@ -102,7 +103,7 @@ void main() {
 
     test('skips syncTrashedAssets when MANAGE_MEDIA permission absent', () async {
       await Store.put(StoreKey.manageLocalMediaAndroid, true);
-      when(() => mockLocalFilesManager.hasManageMediaPermission()).thenAnswer((_) async => false);
+      when(() => mockPermissionRepository.hasManageMediaPermission()).thenAnswer((_) async => false);
 
       await sut.sync();
 
@@ -114,7 +115,7 @@ void main() {
       addTearDown(() => debugDefaultTargetPlatformOverride = TargetPlatform.android);
 
       await Store.put(StoreKey.manageLocalMediaAndroid, true);
-      when(() => mockLocalFilesManager.hasManageMediaPermission()).thenAnswer((_) async => true);
+      when(() => mockPermissionRepository.hasManageMediaPermission()).thenAnswer((_) async => true);
 
       await sut.sync();
 
@@ -131,13 +132,13 @@ void main() {
         durationMs: 0,
         orientation: 0,
         isFavorite: false,
-        playbackStyle: PlatformAssetPlaybackStyle.image
+        playbackStyle: PlatformAssetPlaybackStyle.image,
       );
 
       final assetsToRestore = [LocalAssetStub.image1];
       when(() => mockTrashedLocalAssetRepository.getToRestore()).thenAnswer((_) async => assetsToRestore);
       final restoredIds = ['image1'];
-      when(() => mockLocalFilesManager.restoreAssetsFromTrash(any())).thenAnswer((invocation) async {
+      when(() => mockAssetMediaRepository.restoreAssetsFromTrash(any())).thenAnswer((invocation) async {
         final Iterable<LocalAsset> requested = invocation.positionalArguments.first as Iterable<LocalAsset>;
         expect(requested, orderedEquals(assetsToRestore));
         return restoredIds;
@@ -150,10 +151,6 @@ void main() {
         },
       );
 
-      final assetEntity = MockAssetEntity();
-      when(() => assetEntity.getMediaUrl()).thenAnswer((_) async => 'content://local-trash');
-      when(() => mockStorageRepository.getAssetEntityForAsset(localAssetToTrash)).thenAnswer((_) async => assetEntity);
-
       await sut.processTrashedAssets({
         'album-a': [platformAsset],
       });
@@ -168,12 +165,11 @@ void main() {
       expect(trashedEntry.asset.name, platformAsset.name);
       verify(() => mockTrashedLocalAssetRepository.getToTrash()).called(1);
 
-      verify(() => mockLocalFilesManager.restoreAssetsFromTrash(any())).called(1);
+      verify(() => mockAssetMediaRepository.restoreAssetsFromTrash(any())).called(1);
       verify(() => mockTrashedLocalAssetRepository.applyRestoredAssets(restoredIds)).called(1);
 
-      verify(() => mockStorageRepository.getAssetEntityForAsset(localAssetToTrash)).called(1);
-      final moveArgs = verify(() => mockLocalFilesManager.moveToTrash(captureAny())).captured.single as List<String>;
-      expect(moveArgs, ['content://local-trash']);
+      final moveArgs = verify(() => mockAssetMediaRepository.deleteAll(captureAny())).captured.single as List<String>;
+      expect(moveArgs, ['local-trash']);
       final trashArgs =
           verify(() => mockTrashedLocalAssetRepository.trashLocalAsset(captureAny())).captured.single
               as Map<String, List<LocalAsset>>;
@@ -181,6 +177,26 @@ void main() {
       expect(trashArgs['album-a'], [localAssetToTrash]);
     });
 
+    test('records only local assets that were moved to device trash', () async {
+      final movedAsset = LocalAssetStub.image1.copyWith(id: 'moved-local', checksum: 'checksum-moved');
+      final skippedAsset = LocalAssetStub.image2.copyWith(id: 'skipped-local', checksum: 'checksum-skipped');
+      when(() => mockTrashedLocalAssetRepository.getToTrash()).thenAnswer(
+        (_) async => {
+          'album-a': [movedAsset],
+          'album-b': [skippedAsset],
+        },
+      );
+      when(() => mockAssetMediaRepository.deleteAll(any())).thenAnswer((_) async => ['moved-local']);
+
+      await sut.processTrashedAssets({});
+
+      final trashArgs =
+          verify(() => mockTrashedLocalAssetRepository.trashLocalAsset(captureAny())).captured.single
+              as Map<String, List<LocalAsset>>;
+      expect(trashArgs.keys, ['album-a']);
+      expect(trashArgs['album-a'], [movedAsset]);
+    });
+
     test('does not attempt restore when repository has no assets to restore', () async {
       when(() => mockTrashedLocalAssetRepository.getToRestore()).thenAnswer((_) async => []);
 
@@ -190,7 +206,7 @@ void main() {
           verify(() => mockTrashedLocalAssetRepository.processTrashSnapshot(captureAny())).captured.single
               as Iterable<TrashedAsset>;
       expect(trashedSnapshot, isEmpty);
-      verifyNever(() => mockLocalFilesManager.restoreAssetsFromTrash(any()));
+      verifyNever(() => mockAssetMediaRepository.restoreAssetsFromTrash(any()));
       verifyNever(() => mockTrashedLocalAssetRepository.applyRestoredAssets(any()));
     });
 
@@ -199,7 +215,7 @@ void main() {
 
       await sut.processTrashedAssets({});
 
-      verifyNever(() => mockLocalFilesManager.moveToTrash(any()));
+      verifyNever(() => mockAssetMediaRepository.deleteAll(any()));
       verifyNever(() => mockTrashedLocalAssetRepository.trashLocalAsset(any()));
     });
   });
@@ -215,7 +231,7 @@ void main() {
         isFavorite: false,
         createdAt: 1700000000,
         updatedAt: 1732000000,
-        playbackStyle: PlatformAssetPlaybackStyle.image
+        playbackStyle: PlatformAssetPlaybackStyle.image,
       );
 
       final localAsset = platformAsset.toLocalAsset();

mobile/test/domain/services/sync_stream_service_test.dart

@@ -12,12 +12,11 @@ import 'package:immich_mobile/domain/services/sync_stream.service.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
-import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/store.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/sync_api.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/sync_stream.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/asset_media.repository.dart';
 import 'package:immich_mobile/utils/semver.dart';
 import 'package:mocktail/mocktail.dart';
 import 'package:openapi/api.dart';
@@ -26,7 +25,6 @@ import '../../api.mocks.dart';
 import '../../fixtures/asset.stub.dart';
 import '../../fixtures/sync_stream.stub.dart';
 import '../../infrastructure/repository.mock.dart';
-import '../../mocks/asset_entity.mock.dart';
 import '../../repository.mocks.dart';
 import '../../service.mocks.dart';
 
@@ -52,8 +50,8 @@ void main() {
   late SyncApiRepository mockSyncApiRepo;
   late DriftLocalAssetRepository mockLocalAssetRepo;
   late DriftTrashedLocalAssetRepository mockTrashedLocalAssetRepo;
-  late LocalFilesManagerRepository mockLocalFilesManagerRepo;
-  late StorageRepository mockStorageRepo;
+  late AssetMediaRepository mockAssetMediaRepo;
+  late MockPermissionRepository mockPermissionRepo;
   late MockApiService mockApi;
   late MockServerApi mockServerApi;
   late MockSyncMigrationRepository mockSyncMigrationRepo;
@@ -86,8 +84,8 @@ void main() {
     mockSyncApiRepo = MockSyncApiRepository();
     mockLocalAssetRepo = MockLocalAssetRepository();
     mockTrashedLocalAssetRepo = MockTrashedLocalAssetRepository();
-    mockLocalFilesManagerRepo = MockLocalFilesManagerRepository();
-    mockStorageRepo = MockStorageRepository();
+    mockAssetMediaRepo = MockAssetMediaRepository();
+    mockPermissionRepo = MockPermissionRepository();
     mockAbortCallbackWrapper = _MockAbortCallbackWrapper();
     mockResetCallbackWrapper = _MockAbortCallbackWrapper();
     mockApi = MockApiService();
@@ -159,8 +157,8 @@ void main() {
       syncStreamRepository: mockSyncStreamRepo,
       localAssetRepository: mockLocalAssetRepo,
       trashedLocalAssetRepository: mockTrashedLocalAssetRepo,
-      localFilesManager: mockLocalFilesManagerRepo,
-      storageRepository: mockStorageRepo,
+      assetMediaRepository: mockAssetMediaRepo,
+      permissionRepository: mockPermissionRepo,
       api: mockApi,
       syncMigrationRepository: mockSyncMigrationRepo,
     );
@@ -170,10 +168,12 @@ void main() {
     when(() => mockTrashedLocalAssetRepo.getToRestore()).thenAnswer((_) async => []);
     when(() => mockTrashedLocalAssetRepo.applyRestoredAssets(any())).thenAnswer((_) async {});
     hasManageMediaPermission = false;
-    when(() => mockLocalFilesManagerRepo.hasManageMediaPermission()).thenAnswer((_) async => hasManageMediaPermission);
-    when(() => mockLocalFilesManagerRepo.moveToTrash(any())).thenAnswer((_) async => true);
-    when(() => mockLocalFilesManagerRepo.restoreAssetsFromTrash(any())).thenAnswer((_) async => []);
-    when(() => mockStorageRepo.getAssetEntityForAsset(any())).thenAnswer((_) async => null);
+    when(() => mockPermissionRepo.hasManageMediaPermission()).thenAnswer((_) async => hasManageMediaPermission);
+    when(() => mockAssetMediaRepo.deleteAll(any())).thenAnswer((invocation) async {
+      final ids = invocation.positionalArguments.first as List<String>;
+      return ids;
+    });
+    when(() => mockAssetMediaRepo.restoreAssetsFromTrash(any())).thenAnswer((_) async => []);
     await Store.put(StoreKey.manageLocalMediaAndroid, false);
   });
 
@@ -241,8 +241,8 @@ void main() {
         syncStreamRepository: mockSyncStreamRepo,
         localAssetRepository: mockLocalAssetRepo,
         trashedLocalAssetRepository: mockTrashedLocalAssetRepo,
-        localFilesManager: mockLocalFilesManagerRepo,
-        storageRepository: mockStorageRepo,
+        assetMediaRepository: mockAssetMediaRepo,
+        permissionRepository: mockPermissionRepo,
         cancelChecker: cancellationChecker.call,
         api: mockApi,
         syncMigrationRepository: mockSyncMigrationRepo,
@@ -282,8 +282,8 @@ void main() {
         syncStreamRepository: mockSyncStreamRepo,
         localAssetRepository: mockLocalAssetRepo,
         trashedLocalAssetRepository: mockTrashedLocalAssetRepo,
-        localFilesManager: mockLocalFilesManagerRepo,
-        storageRepository: mockStorageRepo,
+        assetMediaRepository: mockAssetMediaRepo,
+        permissionRepository: mockPermissionRepo,
         cancelChecker: cancellationChecker.call,
         api: mockApi,
         syncMigrationRepository: mockSyncMigrationRepo,
@@ -424,18 +424,10 @@ void main() {
         return assetsByAlbum;
       });
 
-      final localEntity = MockAssetEntity();
-      when(() => localEntity.getMediaUrl()).thenAnswer((_) async => 'content://local-only');
-      when(() => mockStorageRepo.getAssetEntityForAsset(localAsset)).thenAnswer((_) async => localEntity);
-
-      final mergedEntity = MockAssetEntity();
-      when(() => mergedEntity.getMediaUrl()).thenAnswer((_) async => 'content://merged-local');
-      when(() => mockStorageRepo.getAssetEntityForAsset(mergedAsset)).thenAnswer((_) async => mergedEntity);
-
-      when(() => mockLocalFilesManagerRepo.moveToTrash(any())).thenAnswer((invocation) async {
-        final urls = invocation.positionalArguments.first as List<String>;
-        expect(urls, unorderedEquals(['content://local-only', 'content://merged-local']));
-        return true;
+      when(() => mockAssetMediaRepo.deleteAll(any())).thenAnswer((invocation) async {
+        final ids = invocation.positionalArguments.first as List<String>;
+        expect(ids, unorderedEquals(['local-only', 'merged-local']));
+        return ids;
       });
 
       final events = [
@@ -461,10 +453,51 @@ void main() {
 
       await simulateEvents(events);
 
-      verify(() => mockTrashedLocalAssetRepo.trashLocalAsset(assetsByAlbum)).called(1);
+      final trashArgs =
+          verify(() => mockTrashedLocalAssetRepo.trashLocalAsset(captureAny())).captured.single
+              as Map<String, List<LocalAsset>>;
+      expect(trashArgs.keys, unorderedEquals(['album-a', 'album-b']));
+      expect(trashArgs['album-a'], [localAsset]);
+      expect(trashArgs['album-b'], [mergedAsset]);
+      verify(() => mockAssetMediaRepo.deleteAll(any())).called(1);
       verify(() => mockSyncApiRepo.ack(['asset-remote-only-3'])).called(1);
     });
 
+    test("records only assets that were moved to device trash", () async {
+      final movedAsset = LocalAssetStub.image1.copyWith(id: 'moved-local', checksum: 'checksum-moved');
+      final skippedAsset = LocalAssetStub.image2.copyWith(id: 'skipped-local', checksum: 'checksum-skipped');
+      when(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any())).thenAnswer(
+        (_) async => {
+          'album-a': [movedAsset],
+          'album-b': [skippedAsset],
+        },
+      );
+      when(() => mockAssetMediaRepo.deleteAll(any())).thenAnswer((_) async => ['moved-local']);
+
+      final events = [
+        SyncStreamStub.assetTrashed(
+          id: 'remote-moved',
+          checksum: movedAsset.checksum!,
+          ack: 'asset-remote-moved',
+          trashedAt: DateTime(2025, 5, 1),
+        ),
+        SyncStreamStub.assetTrashed(
+          id: 'remote-skipped',
+          checksum: skippedAsset.checksum!,
+          ack: 'asset-remote-skipped',
+          trashedAt: DateTime(2025, 5, 2),
+        ),
+      ];
+
+      await simulateEvents(events);
+
+      final trashArgs =
+          verify(() => mockTrashedLocalAssetRepo.trashLocalAsset(captureAny())).captured.single
+              as Map<String, List<LocalAsset>>;
+      expect(trashArgs.keys, ['album-a']);
+      expect(trashArgs['album-a'], [movedAsset]);
+    });
+
     test("skips device trashing when no local assets match the remote trash payload", () async {
       final events = [
         SyncStreamStub.assetTrashed(
@@ -478,7 +511,7 @@ void main() {
       await simulateEvents(events);
 
       verify(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any())).called(1);
-      verifyNever(() => mockLocalFilesManagerRepo.moveToTrash(any()));
+      verifyNever(() => mockAssetMediaRepo.deleteAll(any()));
       verifyNever(() => mockTrashedLocalAssetRepo.trashLocalAsset(any()));
     });
 
@@ -494,7 +527,7 @@ void main() {
       await simulateEvents(events);
 
       verify(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any())).called(1);
-      verifyNever(() => mockLocalFilesManagerRepo.moveToTrash(any()));
+      verifyNever(() => mockAssetMediaRepo.deleteAll(any()));
       verify(() => mockSyncStreamRepo.deleteAssetsV1(any())).called(1);
     });
 
@@ -505,7 +538,7 @@ void main() {
       when(() => mockTrashedLocalAssetRepo.getToRestore()).thenAnswer((_) async => trashedAssets);
 
       final restoredIds = ['trashed-1'];
-      when(() => mockLocalFilesManagerRepo.restoreAssetsFromTrash(any())).thenAnswer((invocation) async {
+      when(() => mockAssetMediaRepo.restoreAssetsFromTrash(any())).thenAnswer((invocation) async {
         final Iterable<LocalAsset> requestedAssets = invocation.positionalArguments.first as Iterable<LocalAsset>;
         expect(requestedAssets, orderedEquals(trashedAssets));
         return restoredIds;

mobile/test/drift/main/generated/schema.dart

@@ -30,6 +30,7 @@ import 'schema_v23.dart' as v23;
 import 'schema_v24.dart' as v24;
 import 'schema_v25.dart' as v25;
 import 'schema_v26.dart' as v26;
+import 'schema_v27.dart' as v27;
 
 class GeneratedHelper implements SchemaInstantiationHelper {
   @override
@@ -87,6 +88,8 @@ class GeneratedHelper implements SchemaInstantiationHelper {
         return v25.DatabaseAtV25(db);
       case 26:
         return v26.DatabaseAtV26(db);
+      case 27:
+        return v27.DatabaseAtV27(db);
       default:
         throw MissingSchemaException(version, versions);
     }
@@ -119,5 +122,6 @@ class GeneratedHelper implements SchemaInstantiationHelper {
     24,
     25,
     26,
+    27,
   ];
 }

mobile/test/infrastructure/repository.mock.dart

@@ -5,6 +5,7 @@ import 'package:immich_mobile/infrastructure/repositories/log.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/metadata.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/remote_album.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/remote_asset.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/stack.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/store.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/sync_api.repository.dart';
@@ -36,6 +37,8 @@ class MockRemoteAssetRepository extends Mock implements RemoteAssetRepository {}
 
 class MockTrashedLocalAssetRepository extends Mock implements DriftTrashedLocalAssetRepository {}
 
+class MockDriftStackRepository extends Mock implements DriftStackRepository {}
+
 class MockStorageRepository extends Mock implements StorageRepository {}
 
 class MockDriftBackupRepository extends Mock implements DriftBackupRepository {}

mobile/test/repository.mocks.dart

@@ -3,17 +3,17 @@ import 'package:immich_mobile/repositories/asset_media.repository.dart';
 import 'package:immich_mobile/repositories/auth.repository.dart';
 import 'package:immich_mobile/repositories/auth_api.repository.dart';
 import 'package:immich_mobile/domain/services/tag.service.dart';
-import 'package:immich_mobile/repositories/local_files_manager.repository.dart';
+import 'package:immich_mobile/repositories/permission.repository.dart';
 import 'package:mocktail/mocktail.dart';
 
 class MockAssetApiRepository extends Mock implements AssetApiRepository {}
 
 class MockAssetMediaRepository extends Mock implements AssetMediaRepository {}
 
+class MockPermissionRepository extends Mock implements IPermissionRepository {}
+
 class MockAuthApiRepository extends Mock implements AuthApiRepository {}
 
 class MockAuthRepository extends Mock implements AuthRepository {}
 
-class MockLocalFilesManagerRepository extends Mock implements LocalFilesManagerRepository {}
-
 class MockTagService extends Mock implements TagService {}

mobile/test/services/background_upload.service_test.dart

@@ -1,11 +1,13 @@
 import 'dart:convert';
 import 'dart:io';
 
+import 'package:background_downloader/background_downloader.dart';
 import 'package:drift/drift.dart' hide isNull, isNotNull;
 import 'package:drift/native.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:immich_mobile/constants/constants.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/store.model.dart';
 import 'package:immich_mobile/domain/services/store.service.dart';
@@ -13,9 +15,11 @@ import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/metadata.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/store.repository.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
 import 'package:immich_mobile/services/background_upload.service.dart';
 import 'package:mocktail/mocktail.dart';
 
+import '../domain/service.mock.dart';
 import '../fixtures/asset.stub.dart';
 import '../infrastructure/repository.mock.dart';
 import '../mocks/asset_entity.mock.dart';
@@ -28,10 +32,14 @@ void main() {
   late MockDriftLocalAssetRepository mockLocalAssetRepository;
   late MockDriftBackupRepository mockBackupRepository;
   late MockAssetMediaRepository mockAssetMediaRepository;
+  late MockNativeSyncApi mockNativeSyncApi;
+  late MockEditRevertService mockEditRevertService;
   late Drift db;
 
   setUpAll(() async {
     TestWidgetsFlutterBinding.ensureInitialized();
+    registerFallbackValue(LocalAssetStub.image1);
+    registerFallbackValue(<UploadTask>[]);
     TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
       const MethodChannel('plugins.flutter.io/path_provider'),
       (MethodCall methodCall) async => 'test',
@@ -50,6 +58,8 @@ void main() {
     mockLocalAssetRepository = MockDriftLocalAssetRepository();
     mockBackupRepository = MockDriftBackupRepository();
     mockAssetMediaRepository = MockAssetMediaRepository();
+    mockNativeSyncApi = MockNativeSyncApi();
+    mockEditRevertService = MockEditRevertService();
 
     sut = BackgroundUploadService(
       mockUploadRepository,
@@ -57,8 +67,18 @@ void main() {
       mockLocalAssetRepository,
       mockBackupRepository,
       mockAssetMediaRepository,
+      mockNativeSyncApi,
+      mockEditRevertService,
     );
 
+    // Default: no edit base, so getUploadTask falls through to the normal path.
+    when(
+      () => mockNativeSyncApi.getBaseResource(any(), allowNetworkAccess: any(named: 'allowNetworkAccess')),
+    ).thenAnswer((_) async => null);
+
+    // Default: not a revert, so getUploadTask proceeds with the normal flow.
+    when(() => mockEditRevertService.tryHandleRevert(any())).thenAnswer((_) async => false);
+
     mockUploadRepository.onUploadStatus = (_) {};
     mockUploadRepository.onTaskProgress = (_) {};
   });
@@ -122,6 +142,234 @@ void main() {
     });
   });
 
+  group('getUploadTask edit pair', () {
+    test('absorption: stacks the edit under the prior upload via stackParentId', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final asset = LocalAssetStub.image1.copyWith(priorRemoteId: 'prior-remote-1');
+      final mockEntity = MockAssetEntity();
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(asset)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(asset.id)).thenAnswer((_) async => File('/path/to/edit.jpg'));
+      when(() => mockAssetMediaRepository.getOriginalFilename(asset.id)).thenAnswer((_) async => 'edit.jpg');
+
+      final task = await sut.getUploadTask(asset);
+
+      expect(task, isNotNull);
+      expect(task!.group, kBackupEditPairGroup);
+      expect(task.fields['stackParentId'], 'prior-remote-1');
+      verifyNever(() => mockNativeSyncApi.getBaseResource(any(), allowNetworkAccess: any(named: 'allowNetworkAccess')));
+    });
+
+    test('builds a base upload task for an unsynced edit', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final asset = LocalAssetStub.image1.copyWith(
+        checksum: 'edited-sha1',
+        adjustmentTime: DateTime(2025, 1, 1, 0, 0, 30),
+      );
+      final mockEntity = MockAssetEntity();
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(asset)).thenAnswer((_) async => mockEntity);
+      when(
+        () => mockNativeSyncApi.getBaseResource(asset.id, allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer(
+        (_) async => BaseResource(path: '/tmp/base.jpg', sha1: 'original-sha1', sizeBytes: 100, mimeType: 'image/jpeg'),
+      );
+
+      final task = await sut.getUploadTask(asset);
+
+      expect(task, isNotNull);
+      expect(task!.group, kBackupGroup);
+      expect(task.metaData, contains('"isEditPair":true'));
+    });
+
+    test('falls through to a normal upload when base bytes match the checksum', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final asset = LocalAssetStub.image1.copyWith(
+        checksum: 'same-sha1',
+        adjustmentTime: DateTime(2025, 1, 1, 0, 0, 30),
+      );
+      final mockEntity = MockAssetEntity();
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(asset)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(asset.id)).thenAnswer((_) async => File('/path/to/file.jpg'));
+      when(() => mockAssetMediaRepository.getOriginalFilename(asset.id)).thenAnswer((_) async => 'photo.jpg');
+      when(
+        () => mockNativeSyncApi.getBaseResource(asset.id, allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer(
+        (_) async => BaseResource(path: '/tmp/base.jpg', sha1: 'same-sha1', sizeBytes: 100, mimeType: 'image/jpeg'),
+      );
+
+      final task = await sut.getUploadTask(asset);
+
+      expect(task, isNotNull);
+      expect(task!.group, kBackupGroup);
+      expect(task.fields.containsKey('stackParentId'), isFalse);
+    });
+
+    test('gate: skips the native read for an unedited photo (adjustmentTime == createdAt)', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final asset = LocalAssetStub.image1.copyWith(adjustmentTime: LocalAssetStub.image1.createdAt);
+      final mockEntity = MockAssetEntity();
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(asset)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(asset.id)).thenAnswer((_) async => File('/path/to/file.jpg'));
+      when(() => mockAssetMediaRepository.getOriginalFilename(asset.id)).thenAnswer((_) async => 'photo.jpg');
+
+      final task = await sut.getUploadTask(asset);
+
+      expect(task, isNotNull);
+      expect(task!.group, kBackupGroup);
+      expect(task.fields.containsKey('stackParentId'), isFalse);
+      verifyNever(() => mockNativeSyncApi.getBaseResource(any(), allowNetworkAccess: any(named: 'allowNetworkAccess')));
+    });
+
+    test('gate: skips the native read when the photo has no adjustmentTime', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final asset = LocalAssetStub.image1; // adjustmentTime is null
+      final mockEntity = MockAssetEntity();
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(asset)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(asset.id)).thenAnswer((_) async => File('/path/to/file.jpg'));
+      when(() => mockAssetMediaRepository.getOriginalFilename(asset.id)).thenAnswer((_) async => 'photo.jpg');
+
+      final task = await sut.getUploadTask(asset);
+
+      expect(task, isNotNull);
+      expect(task!.group, kBackupGroup);
+      verifyNever(() => mockNativeSyncApi.getBaseResource(any(), allowNetworkAccess: any(named: 'allowNetworkAccess')));
+    });
+  });
+
+  group('edit pair completion', () {
+    test('handleEditPair: enqueues the edit stacked onto the uploaded base', () async {
+      final asset = LocalAssetStub.image1;
+      final metadata = UploadTaskMetadata(
+        localAssetId: asset.id,
+        isLivePhotos: false,
+        livePhotoVideoId: '',
+        isEditPair: true,
+      );
+      final update = TaskStatusUpdate(
+        UploadTask(url: 'http://test-server.com', filename: 'base.jpg'),
+        TaskStatus.complete,
+        null,
+        '{"id":"base-remote-1"}',
+      );
+      final mockEntity = MockAssetEntity();
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockLocalAssetRepository.getById(asset.id)).thenAnswer((_) async => asset);
+      when(() => mockStorageRepository.getAssetEntityForAsset(asset)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(asset.id)).thenAnswer((_) async => File('/path/to/edit.jpg'));
+      when(() => mockAssetMediaRepository.getOriginalFilename(asset.id)).thenAnswer((_) async => 'edit.jpg');
+      when(() => mockUploadRepository.enqueueBackgroundAll(any())).thenAnswer((_) async => [true]);
+
+      await sut.handleEditPair(update, metadata);
+
+      final enqueued =
+          verify(() => mockUploadRepository.enqueueBackgroundAll(captureAny())).captured.single as List<UploadTask>;
+      expect(enqueued.single.fields['stackParentId'], 'base-remote-1');
+      expect(enqueued.single.group, kBackupEditPairGroup);
+    });
+
+    test('handleEditPair: does nothing for a non edit-pair upload', () async {
+      const metadata = UploadTaskMetadata(localAssetId: 'local-1', isLivePhotos: false, livePhotoVideoId: '');
+      final update = TaskStatusUpdate(
+        UploadTask(url: 'http://test-server.com', filename: 'photo.jpg'),
+        TaskStatus.complete,
+        null,
+        '{"id":"remote-1"}',
+      );
+
+      await sut.handleEditPair(update, metadata);
+
+      verifyNever(() => mockUploadRepository.enqueueBackgroundAll(any()));
+    });
+
+    test('recordPriorRemoteIdOnSuccess: marks the local synced with the uploaded id', () async {
+      final asset = LocalAssetStub.image1;
+      final metadata = UploadTaskMetadata(localAssetId: asset.id, isLivePhotos: false, livePhotoVideoId: '');
+      final update = TaskStatusUpdate(
+        UploadTask(url: 'http://test-server.com', filename: 'photo.jpg'),
+        TaskStatus.complete,
+        null,
+        '{"id":"remote-1"}',
+      );
+      when(() => mockLocalAssetRepository.getById(asset.id)).thenAnswer((_) async => asset);
+      when(
+        () => mockLocalAssetRepository.markSynced(
+          any(),
+          priorRemoteId: any(named: 'priorRemoteId'),
+          syncedChecksum: any(named: 'syncedChecksum'),
+        ),
+      ).thenAnswer((_) async {});
+
+      await sut.recordPriorRemoteIdOnSuccess(update, metadata);
+
+      verify(
+        () => mockLocalAssetRepository.markSynced(
+          asset.id,
+          priorRemoteId: 'remote-1',
+          syncedChecksum: asset.checksum ?? '',
+        ),
+      ).called(1);
+    });
+
+    test('recordPriorRemoteIdOnSuccess: skips edit-pair base uploads', () async {
+      const metadata = UploadTaskMetadata(
+        localAssetId: 'local-1',
+        isLivePhotos: false,
+        livePhotoVideoId: '',
+        isEditPair: true,
+      );
+      final update = TaskStatusUpdate(
+        UploadTask(url: 'http://test-server.com', filename: 'base.jpg'),
+        TaskStatus.complete,
+        null,
+        '{"id":"base-remote-1"}',
+      );
+
+      await sut.recordPriorRemoteIdOnSuccess(update, metadata);
+
+      verifyNever(
+        () => mockLocalAssetRepository.markSynced(
+          any(),
+          priorRemoteId: any(named: 'priorRemoteId'),
+          syncedChecksum: any(named: 'syncedChecksum'),
+        ),
+      );
+    });
+
+    test('recordPriorRemoteIdOnSuccess: skips live photos', () async {
+      const metadata = UploadTaskMetadata(localAssetId: 'local-1', isLivePhotos: true, livePhotoVideoId: '');
+      final update = TaskStatusUpdate(
+        UploadTask(url: 'http://test-server.com', filename: 'live.mov'),
+        TaskStatus.complete,
+        null,
+        '{"id":"video-remote-1"}',
+      );
+
+      await sut.recordPriorRemoteIdOnSuccess(update, metadata);
+
+      verifyNever(
+        () => mockLocalAssetRepository.markSynced(
+          any(),
+          priorRemoteId: any(named: 'priorRemoteId'),
+          syncedChecksum: any(named: 'syncedChecksum'),
+        ),
+      );
+    });
+  });
+
   group('getLivePhotoUploadTask', () {
     test('should call getOriginalFilename for live photo upload task', () async {
       final asset = LocalAssetStub.image1;
@@ -172,6 +420,8 @@ void main() {
         mockLocalAssetRepository,
         mockBackupRepository,
         mockAssetMediaRepository,
+        mockNativeSyncApi,
+        mockEditRevertService,
       );
       addTearDown(() => sutWithV24.dispose());
 
@@ -222,6 +472,8 @@ void main() {
         mockLocalAssetRepository,
         mockBackupRepository,
         mockAssetMediaRepository,
+        mockNativeSyncApi,
+        mockEditRevertService,
       );
       addTearDown(() => sutAndroid.dispose());
 
@@ -262,6 +514,8 @@ void main() {
         mockLocalAssetRepository,
         mockBackupRepository,
         mockAssetMediaRepository,
+        mockNativeSyncApi,
+        mockEditRevertService,
       );
       addTearDown(() => sutWithV24.dispose());
 
@@ -302,6 +556,8 @@ void main() {
         mockLocalAssetRepository,
         mockBackupRepository,
         mockAssetMediaRepository,
+        mockNativeSyncApi,
+        mockEditRevertService,
       );
       addTearDown(() => sutWithV24.dispose());
 

mobile/test/unit/mocks.dart

@@ -4,11 +4,14 @@ import 'package:mocktail/mocktail.dart' as mocktail;
 
 import '../domain/service.mock.dart';
 import '../infrastructure/repository.mock.dart';
+import '../repository.mocks.dart';
 
 class UnitMocks {
   final localAlbum = MockLocalAlbumRepository();
   final localAsset = MockDriftLocalAssetRepository();
   final trashedAsset = MockTrashedLocalAssetRepository();
+  final stack = MockDriftStackRepository();
+  final assetApi = MockAssetApiRepository();
 
   final nativeApi = MockNativeSyncApi();
 
@@ -31,6 +34,8 @@ class UnitMocks {
     mocktail.reset(localAlbum);
     mocktail.reset(localAsset);
     mocktail.reset(trashedAsset);
+    mocktail.reset(stack);
+    mocktail.reset(assetApi);
     mocktail.reset(nativeApi);
   }
 }

mobile/test/unit/services/edit_revert_service_test.dart

@@ -0,0 +1,117 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
+import 'package:immich_mobile/domain/services/edit_revert.service.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:mocktail/mocktail.dart';
+
+import '../mocks.dart';
+
+void main() {
+  late EditRevertService sut;
+  final mocks = UnitMocks();
+
+  LocalAsset asset({String? priorRemoteId, String? checksum = 'reverted-sha1'}) => LocalAsset(
+    id: 'local-1',
+    name: 'photo.jpg',
+    type: AssetType.image,
+    createdAt: DateTime(2025),
+    updatedAt: DateTime(2025, 2),
+    playbackStyle: AssetPlaybackStyle.image,
+    isEdited: false,
+    priorRemoteId: priorRemoteId,
+    checksum: checksum,
+  );
+
+  setUp(() {
+    sut = EditRevertService(
+      nativeSyncApi: mocks.nativeApi,
+      stackRepository: mocks.stack,
+      localAssetRepository: mocks.localAsset,
+      assetApiRepository: mocks.assetApi,
+    );
+  });
+
+  tearDown(() {
+    mocks.reset();
+  });
+
+  group('tryHandleRevert', () {
+    test('returns false when the asset was never uploaded as an edit', () async {
+      expect(await sut.tryHandleRevert(asset(priorRemoteId: null)), isFalse);
+      verifyNever(() => mocks.nativeApi.getEditState(any(), allowNetworkAccess: any(named: 'allowNetworkAccess')));
+    });
+
+    test('returns false (lets the pair flow run) when there is still a live edit', () async {
+      when(
+        () => mocks.nativeApi.getEditState('local-1', allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer((_) async => EditState.edited);
+
+      expect(await sut.tryHandleRevert(asset(priorRemoteId: 'remote-edit')), isFalse);
+      verifyNever(() => mocks.stack.findStackIdByRemoteId(any()));
+    });
+
+    test('returns false when the edit state cannot be read (offloaded to iCloud)', () async {
+      when(
+        () => mocks.nativeApi.getEditState('local-1', allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer((_) async => EditState.unknown);
+
+      expect(await sut.tryHandleRevert(asset(priorRemoteId: 'remote-edit')), isFalse);
+      verifyNever(() => mocks.stack.findStackIdByRemoteId(any()));
+    });
+
+    test('returns false when the prior remote is not in a stack', () async {
+      when(
+        () => mocks.nativeApi.getEditState('local-1', allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer((_) async => EditState.notEdited);
+      when(() => mocks.stack.findStackIdByRemoteId('remote-edit')).thenAnswer((_) async => null);
+
+      expect(await sut.tryHandleRevert(asset(priorRemoteId: 'remote-edit')), isFalse);
+      verifyNever(() => mocks.assetApi.setStackPrimary(any(), any()));
+    });
+
+    test('returns false when the stack has no base member to flip back to', () async {
+      when(
+        () => mocks.nativeApi.getEditState('local-1', allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer((_) async => EditState.notEdited);
+      when(() => mocks.stack.findStackIdByRemoteId('remote-edit')).thenAnswer((_) async => 'stack-1');
+      when(() => mocks.stack.findStackBaseId('stack-1', excludeId: 'remote-edit')).thenAnswer((_) async => null);
+
+      expect(await sut.tryHandleRevert(asset(priorRemoteId: 'remote-edit')), isFalse);
+      verifyNever(() => mocks.assetApi.setStackPrimary(any(), any()));
+    });
+
+    test('flips the primary back to the base via prior_remote_id and keeps the edit (no trash)', () async {
+      when(
+        () => mocks.nativeApi.getEditState('local-1', allowNetworkAccess: any(named: 'allowNetworkAccess')),
+      ).thenAnswer((_) async => EditState.notEdited);
+      when(() => mocks.stack.findStackIdByRemoteId('remote-edit')).thenAnswer((_) async => 'stack-1');
+      when(
+        () => mocks.stack.findStackBaseId('stack-1', excludeId: 'remote-edit'),
+      ).thenAnswer((_) async => 'remote-base');
+      when(() => mocks.assetApi.setStackPrimary('stack-1', 'remote-base')).thenAnswer((_) async {});
+      when(() => mocks.stack.setPrimary('stack-1', 'remote-base')).thenAnswer((_) async {});
+      when(
+        () => mocks.localAsset.markSynced(
+          'local-1',
+          priorRemoteId: 'remote-base',
+          syncedChecksum: any(named: 'syncedChecksum'),
+        ),
+      ).thenAnswer((_) async {});
+
+      expect(await sut.tryHandleRevert(asset(priorRemoteId: 'remote-edit')), isTrue);
+
+      verify(() => mocks.assetApi.setStackPrimary('stack-1', 'remote-base')).called(1);
+      verify(() => mocks.stack.setPrimary('stack-1', 'remote-base')).called(1);
+      verify(
+        () => mocks.localAsset.markSynced(
+          'local-1',
+          priorRemoteId: 'remote-base',
+          syncedChecksum: any(named: 'syncedChecksum'),
+        ),
+      ).called(1);
+      // Nothing is trashed or unstacked; every edit stays in the stack.
+      verifyNever(() => mocks.assetApi.delete(any(), any()));
+      verifyNever(() => mocks.assetApi.unStack(any()));
+    });
+  });
+}

mobile/test/unit/services/hash_service_test.dart

@@ -1,6 +1,8 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:immich_mobile/domain/models/album/local_album.model.dart';
 import 'package:immich_mobile/domain/services/hash.service.dart';
+import 'package:immich_mobile/infrastructure/repositories/stack.repository.dart';
 import 'package:immich_mobile/platform/native_sync_api.g.dart';
 import 'package:mocktail/mocktail.dart';
 
@@ -18,6 +20,8 @@ void main() {
       localAssetRepository: mocks.localAsset,
       nativeSyncApi: mocks.nativeApi,
       trashedLocalAssetRepository: mocks.trashedAsset,
+      stackRepository: mocks.stack,
+      assetApiRepository: mocks.assetApi,
     );
 
     when(() => mocks.localAsset.reconcileHashesFromCloudId()).thenAnswer((_) async => {});
@@ -110,6 +114,8 @@ void main() {
           nativeSyncApi: mocks.nativeApi,
           batchSize: batchSize,
           trashedLocalAssetRepository: mocks.trashedAsset,
+          stackRepository: mocks.stack,
+          assetApiRepository: mocks.assetApi,
         );
 
         final album = LocalAlbumFactory.create();
@@ -183,5 +189,61 @@ void main() {
         verify(() => mocks.nativeApi.hashAssets([asset2.id], allowNetworkAccess: false)).called(1);
       });
     });
+
+    group('iOS revert reconcile', () {
+      test('flips the stack primary for a non-styled revert that re-hashed to the base', () async {
+        debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+        addTearDown(() => debugDefaultTargetPlatformOverride = null);
+        registerFallbackValue(<String>[]);
+
+        final album = LocalAlbumFactory.create();
+        final asset = LocalAssetFactory.create();
+        when(() => mocks.localAlbum.getBackupAlbums()).thenAnswer((_) async => [album]);
+        when(() => mocks.localAlbum.getAssetsToHash(album.id)).thenAnswer((_) async => [asset]);
+        when(
+          () => mocks.nativeApi.hashAssets([asset.id], allowNetworkAccess: false),
+        ).thenAnswer((_) async => [HashResult(assetId: asset.id, hash: 'h')]);
+
+        const target = StackReconcileTarget(
+          stackId: 'stack-1',
+          newPrimaryId: 'base-1',
+          localAssetId: 'local-1',
+          localAssetChecksum: 'reverted-sha1',
+        );
+        when(() => mocks.stack.findRevertReconcileTargets(any())).thenAnswer((_) async => [target]);
+        when(() => mocks.assetApi.setStackPrimary('stack-1', 'base-1')).thenAnswer((_) async {});
+        when(() => mocks.stack.setPrimary('stack-1', 'base-1')).thenAnswer((_) async {});
+        when(
+          () => mocks.localAsset.markSynced('local-1', priorRemoteId: 'base-1', syncedChecksum: 'reverted-sha1'),
+        ).thenAnswer((_) async {});
+
+        await sut.hashAssets();
+
+        verify(() => mocks.assetApi.setStackPrimary('stack-1', 'base-1')).called(1);
+        verify(() => mocks.stack.setPrimary('stack-1', 'base-1')).called(1);
+        verify(
+          () => mocks.localAsset.markSynced('local-1', priorRemoteId: 'base-1', syncedChecksum: 'reverted-sha1'),
+        ).called(1);
+      });
+
+      test('does not reconcile on a non-iOS platform', () async {
+        debugDefaultTargetPlatformOverride = TargetPlatform.android;
+        addTearDown(() => debugDefaultTargetPlatformOverride = null);
+        registerFallbackValue(<String>[]);
+
+        final album = LocalAlbumFactory.create();
+        final asset = LocalAssetFactory.create();
+        when(() => mocks.localAlbum.getBackupAlbums()).thenAnswer((_) async => [album]);
+        when(() => mocks.localAlbum.getAssetsToHash(album.id)).thenAnswer((_) async => [asset]);
+        when(() => mocks.trashedAsset.getAssetsToHash(any())).thenAnswer((_) async => []);
+        when(
+          () => mocks.nativeApi.hashAssets([asset.id], allowNetworkAccess: false),
+        ).thenAnswer((_) async => [HashResult(assetId: asset.id, hash: 'h')]);
+
+        await sut.hashAssets();
+
+        verifyNever(() => mocks.stack.findRevertReconcileTargets(any()));
+      });
+    });
   });
 }

open-api/immich-openapi-specs.json

@@ -16490,6 +16490,12 @@
             "format": "binary",
             "type": "string"
           },
+          "stackParentId": {
+            "description": "Stack this asset onto the parent asset, with the new asset as the stack primary",
+            "format": "uuid",
+            "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12})$",
+            "type": "string"
+          },
           "visibility": {
             "$ref": "#/components/schemas/AssetVisibility"
           }

packages/sdk/src/fetch-client.ts

@@ -630,6 +630,8 @@ export type AssetMediaCreateDto = {
     metadata?: AssetMetadataUpsertItemDto[];
     /** Sidecar file data */
     sidecarData?: Blob;
+    /** Stack this asset onto the parent asset, with the new asset as the stack primary */
+    stackParentId?: string;
     visibility?: AssetVisibility;
 };
 export type AssetMediaResponseDto = {

server/Dockerfile

@@ -88,8 +88,8 @@ ENV NODE_ENV=production \
 COPY --from=server /output/server-pruned ./server
 COPY --from=web /usr/src/app/web/build /build/www
 COPY --from=cli /output/cli-pruned ./cli
-COPY --from=plugins /app/packages/plugin-core/dist /build/plugins/immich-core-plugin/dist
-COPY --from=plugins /app/packages/plugin-core/manifest.json /build/plugins/immich-core-plugin/manifest.json
+COPY --from=plugins /app/packages/plugin-core/dist /build/plugins/immich-plugin-core/dist
+COPY --from=plugins /app/packages/plugin-core/manifest.json /build/plugins/immich-plugin-core/manifest.json
 RUN ln -s ../../cli/bin/immich server/bin/immich
 COPY LICENSE /licenses/LICENSE.txt
 COPY LICENSE /LICENSE

server/src/dtos/asset-media.dto.ts

@@ -48,6 +48,10 @@ const AssetMediaCreateSchema = AssetMediaBaseSchema.extend({
   isFavorite: stringToBool.optional().describe('Mark as favorite'),
   visibility: AssetVisibilitySchema.optional(),
   livePhotoVideoId: z.uuidv4().optional().describe('Live photo video ID'),
+  stackParentId: z
+    .uuidv4()
+    .optional()
+    .describe('Stack this asset onto the parent asset, with the new asset as the stack primary'),
   metadata: JsonParsed.pipe(z.array(AssetMetadataUpsertItemSchema)).optional().describe('Asset metadata items'),
   [UploadFieldName.SIDECAR_DATA]: z
     .any()

server/src/repositories/stack.repository.ts

@@ -6,7 +6,7 @@ import { columns } from 'src/database';
 import { DummyValue, GenerateSql } from 'src/decorators';
 import { DB } from 'src/schema';
 import { StackTable } from 'src/schema/tables/stack.table';
-import { asUuid, withDefaultVisibility } from 'src/utils/database';
+import { asUuid, isStackPrimaryConstraint, withDefaultVisibility } from 'src/utils/database';
 
 export interface StackSearch {
   ownerId: string;
@@ -124,6 +124,63 @@ export class StackRepository {
     });
   }
 
+  async linkAsset(
+    ownerId: string,
+    newAssetId: string,
+    parentId: string,
+  ): Promise<{ stackId: string; created: boolean } | null> {
+    try {
+      return await this.db.transaction().execute(async (tx) => {
+        // Lock the parent so two concurrent uploads can't each create a stack for it.
+        const parent = await tx
+          .selectFrom('asset')
+          .select(['id', 'ownerId', 'stackId', 'deletedAt'])
+          .where('id', '=', asUuid(parentId))
+          .forUpdate()
+          .executeTakeFirst();
+
+        if (!parent || parent.ownerId !== ownerId || parent.deletedAt) {
+          return null;
+        }
+
+        if (parent.stackId) {
+          await tx
+            .updateTable('asset')
+            .set({ stackId: parent.stackId, updatedAt: new Date() })
+            .where('id', '=', asUuid(newAssetId))
+            .execute();
+          await tx
+            .updateTable('stack')
+            .set({ primaryAssetId: newAssetId, updatedAt: new Date() })
+            .where('id', '=', parent.stackId)
+            .execute();
+          return { stackId: parent.stackId, created: false };
+        }
+
+        const stack = await tx
+          .insertInto('stack')
+          .values({ ownerId, primaryAssetId: newAssetId })
+          .returning('id')
+          .executeTakeFirstOrThrow();
+
+        await tx
+          .updateTable('asset')
+          .set({ stackId: stack.id, updatedAt: new Date() })
+          .where('id', 'in', [asUuid(newAssetId), parent.id])
+          .execute();
+
+        return { stackId: stack.id, created: true };
+      });
+    } catch (error) {
+      // newAssetId may already be another stack's primary (e.g. a retried upload).
+      // Treat the unique-constraint hit as "couldn't stack" rather than a 500.
+      if (isStackPrimaryConstraint(error)) {
+        return null;
+      }
+      throw error;
+    }
+  }
+
   @GenerateSql({ params: [DummyValue.UUID] })
   async delete(id: string): Promise<void> {
     await this.db.deleteFrom('stack').where('id', '=', asUuid(id)).execute();

server/src/schema/migrations/1773175313374-Test.ts

@@ -1,9 +0,0 @@
-import { Kysely, sql } from 'kysely';
-
-export async function up(db: Kysely<any>): Promise<void> {
-  await sql`ALTER TABLE "workflow" ADD "updateId" uuid NOT NULL DEFAULT immich_uuid_v7();`.execute(db);
-}
-
-export async function down(db: Kysely<any>): Promise<void> {
-  await sql`ALTER TABLE "workflow" DROP COLUMN "updateId";`.execute(db);
-}

server/src/services/asset-media.service.spec.ts

@@ -418,6 +418,79 @@ describe(AssetMediaService.name, () => {
       expect(mocks.asset.update).not.toHaveBeenCalled();
     });
 
+    it('should stack a new asset onto the parent and emit the populated stackId', async () => {
+      const file = {
+        uuid: 'random-uuid',
+        originalPath: 'fake_path/asset_1.jpeg',
+        mimeType: 'image/jpeg',
+        checksum: Buffer.from('file hash', 'utf8'),
+        originalName: 'asset_1.jpeg',
+        size: 42,
+      };
+      const parent = AssetFactory.create();
+      mocks.access.asset.checkOwnerAccess.mockResolvedValue(new Set([parent.id]));
+      mocks.asset.getById.mockResolvedValueOnce(getForAsset(parent));
+      mocks.asset.create.mockResolvedValue(assetEntity);
+      mocks.stack.linkAsset.mockResolvedValue({ stackId: 'stack-1', created: true });
+
+      await expect(sut.uploadAsset(authStub.user1, { ...createDto, stackParentId: parent.id }, file)).resolves.toEqual({
+        id: 'id_1',
+        status: AssetMediaStatus.CREATED,
+      });
+
+      expect(mocks.stack.linkAsset).toHaveBeenCalledWith(authStub.user1.user.id, assetEntity.id, parent.id);
+      expect(mocks.event.emit).toHaveBeenCalledWith('AssetCreate', {
+        asset: expect.objectContaining({ stackId: 'stack-1' }),
+      });
+    });
+
+    it('should reject stacking onto a trashed asset', async () => {
+      const file = {
+        uuid: 'random-uuid',
+        originalPath: 'fake_path/asset_1.jpeg',
+        mimeType: 'image/jpeg',
+        checksum: Buffer.from('file hash', 'utf8'),
+        originalName: 'asset_1.jpeg',
+        size: 42,
+      };
+      const parent = AssetFactory.create();
+      mocks.access.asset.checkOwnerAccess.mockResolvedValue(new Set([parent.id]));
+      mocks.asset.getById.mockResolvedValueOnce({ ...getForAsset(parent), deletedAt: new Date() });
+
+      await expect(
+        sut.uploadAsset(authStub.user1, { ...createDto, stackParentId: parent.id }, file),
+      ).rejects.toBeInstanceOf(BadRequestException);
+
+      expect(mocks.asset.create).not.toHaveBeenCalled();
+      expect(mocks.stack.linkAsset).not.toHaveBeenCalled();
+    });
+
+    it('should adopt a duplicate into the stack when stacking', async () => {
+      const file = {
+        uuid: 'random-uuid',
+        originalPath: 'fake_path/asset_1.jpeg',
+        mimeType: 'image/jpeg',
+        checksum: Buffer.from('file hash', 'utf8'),
+        originalName: 'asset_1.jpeg',
+        size: 0,
+      };
+      const parent = AssetFactory.create();
+      const error = new Error('unique key violation');
+      (error as any).constraint_name = ASSET_CHECKSUM_CONSTRAINT;
+      mocks.access.asset.checkOwnerAccess.mockResolvedValue(new Set([parent.id]));
+      mocks.asset.getById.mockResolvedValueOnce(getForAsset(parent));
+      mocks.asset.create.mockRejectedValue(error);
+      mocks.asset.getUploadAssetIdByChecksum.mockResolvedValue('dup-id');
+      mocks.stack.linkAsset.mockResolvedValue({ stackId: 'stack-1', created: false });
+
+      await expect(sut.uploadAsset(authStub.user1, { ...createDto, stackParentId: parent.id }, file)).resolves.toEqual({
+        id: 'dup-id',
+        status: AssetMediaStatus.DUPLICATE,
+      });
+
+      expect(mocks.stack.linkAsset).toHaveBeenCalledWith(authStub.user1.user.id, 'dup-id', parent.id);
+    });
+
     it('should hide the linked motion asset', async () => {
       const motionAsset = AssetFactory.from({ type: AssetType.Video }).owner(authStub.user1.user).build();
       const asset = AssetFactory.create();

server/src/services/asset-media.service.ts

@@ -140,26 +140,63 @@ export class AssetMediaService extends BaseService {
 
       this.requireQuota(auth, file.size);
 
+      if (dto.stackParentId) {
+        if (auth.sharedLink) {
+          throw new BadRequestException('Cannot stack an asset uploaded via shared link');
+        }
+        await this.requireAccess({ auth, permission: Permission.AssetUpdate, ids: [dto.stackParentId] });
+        const parent = await this.assetRepository.getById(dto.stackParentId);
+        if (!parent || parent.deletedAt) {
+          throw new BadRequestException('Cannot stack onto a trashed or missing asset');
+        }
+      }
+
       if (dto.livePhotoVideoId) {
         await onBeforeLink(
           { asset: this.assetRepository, event: this.eventRepository },
           { userId: auth.user.id, livePhotoVideoId: dto.livePhotoVideoId },
         );
       }
-      const asset = await this.create(auth.user.id, dto, file, sidecarFile);
+      // When stacking, defer the AssetCreate event and emit it below with the
+      // populated stackId, so clients don't briefly see the asset as standalone.
+      const asset = await this.create(auth.user.id, dto, file, sidecarFile, { skipEventEmit: !!dto.stackParentId });
 
       if (auth.sharedLink) {
         await this.addToSharedLink(auth.sharedLink, asset.id);
       }
 
+      if (dto.stackParentId) {
+        const linkResult = await this.linkToStackParent(auth.user.id, asset.id, dto.stackParentId);
+        await this.eventRepository.emit('AssetCreate', {
+          asset: linkResult ? { ...asset, stackId: linkResult.stackId } : asset,
+        });
+      }
+
       await this.userRepository.updateUsage(auth.user.id, file.size);
 
       return { id: asset.id, status: AssetMediaStatus.CREATED };
     } catch (error: any) {
-      return this.handleUploadError(error, auth, file, sidecarFile);
+      return this.handleUploadError(error, auth, file, sidecarFile, dto.stackParentId);
     }
   }
 
+  private async linkToStackParent(
+    ownerId: string,
+    newAssetId: string,
+    parentId: string,
+  ): Promise<{ stackId: string; created: boolean } | null> {
+    const result = await this.stackRepository.linkAsset(ownerId, newAssetId, parentId);
+    if (!result) {
+      this.logger.warn(`Could not link asset ${newAssetId} to stack parent ${parentId}: parent missing or not owned`);
+      return null;
+    }
+    await this.eventRepository.emit(result.created ? 'StackCreate' : 'StackUpdate', {
+      stackId: result.stackId,
+      userId: ownerId,
+    });
+    return result;
+  }
+
   async downloadOriginal(auth: AuthDto, id: string, dto: AssetDownloadOriginalDto): Promise<ImmichFileResponse> {
     await this.requireAccess({ auth, permission: Permission.AssetDownload, ids: [id] });
 
@@ -290,6 +327,7 @@ export class AssetMediaService extends BaseService {
     auth: AuthDto,
     file: UploadFile,
     sidecarFile?: UploadFile,
+    stackParentId?: string,
   ): Promise<AssetMediaResponseDto> {
     // clean up files
     await this.jobRepository.queue({
@@ -309,6 +347,12 @@ export class AssetMediaService extends BaseService {
         await this.addToSharedLink(auth.sharedLink, duplicateId);
       }
 
+      if (stackParentId) {
+        // Adopt the existing duplicate into the stack so a re-uploaded edit still
+        // stacks instead of silently staying separate.
+        await this.linkToStackParent(auth.user.id, duplicateId, stackParentId);
+      }
+
       this.logger.debug(`Duplicate asset upload rejected: existing asset ${duplicateId}`);
       return { status: AssetMediaStatus.DUPLICATE, id: duplicateId };
     }
@@ -317,7 +361,13 @@ export class AssetMediaService extends BaseService {
     throw error;
   }
 
-  private async create(ownerId: string, dto: AssetMediaCreateDto, file: UploadFile, sidecarFile?: UploadFile) {
+  private async create(
+    ownerId: string,
+    dto: AssetMediaCreateDto,
+    file: UploadFile,
+    sidecarFile?: UploadFile,
+    options?: { skipEventEmit?: boolean },
+  ) {
     const asset = await this.assetRepository.create({
       ownerId,
       libraryId: null,
@@ -356,7 +406,9 @@ export class AssetMediaService extends BaseService {
       lockedPropertiesBehavior: 'override',
     });
 
-    await this.eventRepository.emit('AssetCreate', { asset });
+    if (!options?.skipEventEmit) {
+      await this.eventRepository.emit('AssetCreate', { asset });
+    }
 
     await this.jobRepository.queue({ name: JobName.AssetExtractMetadata, data: { id: asset.id, source: 'upload' } });
 

server/src/utils/database.ts

@@ -76,6 +76,12 @@ export const isAssetChecksumConstraint = (error: unknown) => {
   return (error as PostgresError)?.constraint_name === 'UQ_assets_owner_checksum';
 };
 
+export const STACK_PRIMARY_CONSTRAINT = 'stack_primaryAssetId_uq';
+
+export const isStackPrimaryConstraint = (error: unknown) => {
+  return (error as PostgresError)?.constraint_name === STACK_PRIMARY_CONSTRAINT;
+};
+
 export function withDefaultVisibility<O>(qb: SelectQueryBuilder<DB, 'asset', O>) {
   return qb.where('asset.visibility', 'in', [sql.lit(AssetVisibility.Archive), sql.lit(AssetVisibility.Timeline)]);
 }