Initial commit: Quiet Thanks gratitude app

A calm, private gratitude and mood log built with Next.js 16, TypeScript,
Tailwind CSS, and SQLite/Drizzle ORM.

Features:
- Quick check-in with autosave (800ms debounce)
- Optional mood selector (5 levels) with accessibility labels
- Optional tags with tap-to-add from recent
- Timeline with weekly reflection card
- Filters by mood, tag, and rough day
- Export to Markdown and JSON
- Dark mode default
- Delete with undo toast
- Docker deployment ready

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,11 @@
+services:
+  quietthanks:
+    build: .
+    container_name: quietthanks
+    restart: unless-stopped
+    ports:
+      - "6124:3000"
+    volumes:
+      - ./data:/app/data
+    environment:
+      - DATABASE_PATH=/app/data/quietthanks.db