feat: add notepad tool

src/components/tools/notepad/button/button.module.css

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+.button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 30px;
+  height: 30px;
+  font-size: var(--font-sm);
+  color: var(--color-foreground);
+  cursor: pointer;
+  background-color: var(--color-neutral-100);
+  border: 1px solid var(--color-neutral-200);
+  border-radius: 4px;
+  outline: none;
+  transition: 0.2s;
+  transition-property: border-color, color, background-color;
+
+  &:focus-visible {
+    outline: 2px solid var(--color-neutral-400);
+    outline-offset: 2px;
+  }
+
+  &.critical {
+    color: #f43f5e;
+    border-color: #f43f5e;
+
+    &:hover {
+      background-color: rgb(244 63 94 / 10%);
+    }
+  }
+
+  &.recommended {
+    font-size: var(--font-xsm);
+    color: #22c55e;
+    border-color: #22c55e;
+
+    &:hover {
+      background-color: rgb(34 197 94 / 10%);
+    }
+  }
+
+  &:hover,
+  &:focus-visible {
+    background-color: var(--color-neutral-200);
+  }
+}

src/components/tools/notepad/button/button.tsx

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+import { Tooltip } from '@/components/tooltip';
+
+import { cn } from '@/helpers/styles';
+
+import styles from './button.module.css';
+
+interface ButtonProps {
+  critical?: boolean;
+  icon: React.ReactElement;
+  onClick: () => void;
+  recommended?: boolean;
+  tooltip: string;
+}
+
+export function Button({
+  critical,
+  icon,
+  onClick,
+  recommended,
+  tooltip,
+}: ButtonProps) {
+  return (
+    <Tooltip content={tooltip} placement="bottom" showDelay={0}>
+      <button
+        className={cn(
+          styles.button,
+          critical && styles.critical,
+          recommended && styles.recommended,
+        )}
+        onClick={onClick}
+      >
+        {icon}
+      </button>
+    </Tooltip>
+  );
+}

src/components/tools/notepad/button/index.ts

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+export { Button } from './button';

src/components/tools/notepad/index.ts

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+export { Notepad } from './notepad';

src/components/tools/notepad/notepad.module.css

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+.header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 8px;
+
+  & .label {
+    font-size: var(--font-sm);
+    font-weight: 500;
+    color: var(--color-foreground-subtle);
+  }
+
+  & .buttons {
+    display: flex;
+    column-gap: 4px;
+    align-items: center;
+  }
+}
+
+.textarea {
+  width: 100%;
+  height: 350px;
+  padding: 12px;
+  line-height: 1.6;
+  color: var(--color-foreground-subtle);
+  resize: none;
+  background-color: var(--color-neutral-50);
+  border: 1px solid var(--color-neutral-200);
+  border-radius: 4px;
+  outline: none;
+  scroll-padding-bottom: 12px;
+
+  &:focus-visible {
+    outline: 2px solid var(--color-neutral-400);
+    outline-offset: 2px;
+  }
+}
+
+.counter {
+  margin-top: 8px;
+  font-size: var(--font-xsm);
+  color: var(--color-foreground-subtle);
+  text-align: center;
+}

src/components/tools/notepad/notepad.tsx

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+import { BiTrash } from 'react-icons/bi/index';
+import { LuCopy, LuDownload } from 'react-icons/lu/index';
+import { FaCheck } from 'react-icons/fa6/index';
+import { FaUndo } from 'react-icons/fa/index';
+
+import { Button } from './button';
+
+import { useNoteStore } from '@/stores/note';
+import { useCopy } from '@/hooks/use-copy';
+import { download } from '@/helpers/download';
+
+import styles from './notepad.module.css';
+import { Container } from '@/components/container';
+
+export function Notepad() {
+  const note = useNoteStore(state => state.note);
+  const history = useNoteStore(state => state.history);
+  const write = useNoteStore(state => state.write);
+  const words = useNoteStore(state => state.words());
+  const characters = useNoteStore(state => state.characters());
+  const clear = useNoteStore(state => state.clear);
+  const restore = useNoteStore(state => state.restore);
+
+  const { copy, copying } = useCopy();
+
+  return (
+    <Container>
+      <header className={styles.header}>
+        <h2 className={styles.label}>Your Note</h2>
+        <div className={styles.buttons}>
+          <Button
+            icon={copying ? <FaCheck /> : <LuCopy />}
+            tooltip="Copy Note"
+            onClick={() => copy(note)}
+          />
+          <Button
+            icon={<LuDownload />}
+            tooltip="Download Note"
+            onClick={() => download('Moodit Note.txt', note)}
+          />
+          <Button
+            critical={!history}
+            icon={history ? <FaUndo /> : <BiTrash />}
+            recommended={!!history}
+            tooltip={history ? 'Restore Note' : 'Clear Note'}
+            onClick={() => (history ? restore() : clear())}
+          />
+        </div>
+      </header>
+
+      <textarea
+        className={styles.textarea}
+        dir="auto"
+        placeholder="What is on your mind?"
+        spellCheck={false}
+        value={note}
+        onChange={e => write(e.target.value)}
+      />
+
+      <p className={styles.counter}>
+        {characters} character{characters !== 1 && 's'} • {words} word
+        {words !== 1 && 's'}
+      </p>
+    </Container>
+  );
+}

src/pages/tools/notepad.astro

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+---
+import Layout from '@/layouts/layout.astro';
+
+import Donate from '@/components/donate.astro';
+import Hero from '@/components/tools/hero.astro';
+import Footer from '@/components/footer.astro';
+import About from '@/components/tools/about.astro';
+import { Notepad as NotepadComponent } from '@/components/tools/notepad';
+---
+
+<Layout title="Online Notepad — Moodist">
+  <Donate />
+  <Hero desc="Distraction-free online notepad." title="Notepad" />
+  <NotepadComponent client:load />
+  <About
+    text="Capture your thoughts instantly with our simple online notepad. Lightweight and easy to use, it lets you jot down notes, ideas, and to-do lists anytime, anywhere, without distractions."
+  />
+  <Footer />
+</Layout>