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>

drizzle/0000_busy_earthquake.sql

@@ -0,0 +1,25 @@
+CREATE TABLE `entries` (
+	`id` text PRIMARY KEY NOT NULL,
+	`date` text NOT NULL,
+	`text` text NOT NULL,
+	`mood` integer,
+	`rough_day` integer DEFAULT 0 NOT NULL,
+	`created_at` integer NOT NULL,
+	`updated_at` integer NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE `entry_tags` (
+	`entry_id` text NOT NULL,
+	`tag_id` text NOT NULL,
+	PRIMARY KEY(`entry_id`, `tag_id`),
+	FOREIGN KEY (`entry_id`) REFERENCES `entries`(`id`) ON UPDATE no action ON DELETE cascade,
+	FOREIGN KEY (`tag_id`) REFERENCES `tags`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE TABLE `tags` (
+	`id` text PRIMARY KEY NOT NULL,
+	`name` text NOT NULL,
+	`created_at` integer NOT NULL
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `tags_name_unique` ON `tags` (`name`);