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>
2026-05-24 21:31:41 +08:00 · 2026-01-24 01:57:20 +00:00
commit 5555c1e6b5
43 changed files with 11337 additions and 0 deletions
--- a/.dockerignore
+++ b/.dockerignore
@@ -0,0 +1,9 @@
+node_modules
+.next
+.git
+.gitignore
+*.md
+.env*
+data/*.db
+data/*.db-wal
+data/*.db-shm
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,35 @@
+# dependencies
+node_modules
+.pnp
+.pnp.js
+
+# testing
+coverage
+
+# next.js
+.next/
+out/
+build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files
+.env*
+!.env.example
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+# database
+data/*.db
+data/*.db-wal
+data/*.db-shm
--- a/57
+++ b/57
@@ -0,0 +1,57 @@
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Install build dependencies for native modules (better-sqlite3)
+RUN apk add --no-cache python3 make g++
+
+# Install dependencies (skip postinstall as source isn't there yet)
+COPY package*.json ./
+RUN npm ci --ignore-scripts
+
+# Rebuild better-sqlite3 native bindings
+RUN npm rebuild better-sqlite3
+
+# Copy source files
+COPY . .
+
+# Generate database migrations and run them
+RUN npx drizzle-kit generate || true
+RUN npm run db:migrate || true
+
+# Build the application
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV DATABASE_PATH=/app/data/quietthanks.db
+
+# Create non-root user
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+# Copy built application
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/drizzle ./drizzle
+COPY --from=builder /app/src/lib/db/migrate.ts ./src/lib/db/migrate.ts
+COPY --from=builder /app/src/lib/db/schema.ts ./src/lib/db/schema.ts
+COPY --from=builder /app/node_modules ./node_modules
+
+# Create data directory
+RUN mkdir -p /app/data && chown -R nextjs:nodejs /app/data
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]
--- a/README.md
+++ b/README.md
@@ -0,0 +1,131 @@
+# Quiet Thanks
+
+A calm, private gratitude and mood log. No streaks, no gamification—just a simple way to reflect on what you're grateful for.
+
+## Features
+
+- **Quick check-in**: One prompt, optional mood, optional tags. Entry capture takes 10-20 seconds.
+- **Autosave**: No save button needed. Your entry saves automatically as you type.
+- **Timeline**: View all entries in reverse chronological order with filters.
+- **Weekly reflection**: See your entry count and top tags from the past 7 days.
+- **Export**: Download all entries as Markdown or JSON.
+- **Dark mode**: Calm, minimal interface with soft colors.
+- **Self-hosted**: Your data stays on your server.
+
+## Quick Start
+
+### Docker (Recommended)
+
+```bash
+docker compose up -d
+```
+
+The app will be available at `http://localhost:6124`.
+
+### Manual Setup
+
+1. Install dependencies:
+   ```bash
+   npm install
+   ```
+
+2. Generate and run database migrations:
+   ```bash
+   npm run db:generate
+   npm run db:migrate
+   ```
+
+3. Start the development server:
+   ```bash
+   npm run dev
+   ```
+
+4. Open `http://localhost:3000` in your browser.
+
+## Development
+
+```bash
+# Install dependencies
+npm install
+
+# Generate database migrations after schema changes
+npm run db:generate
+
+# Run migrations
+npm run db:migrate
+
+# Start dev server
+npm run dev
+
+# Build for production
+npm run build
+
+# Start production server
+npm start
+
+# View database with Drizzle Studio
+npm run db:studio
+```
+
+## Database
+
+- **Location**: `./data/quietthanks.db` (SQLite)
+- **Environment variable**: `DATABASE_PATH` to customize location
+- **Migrations**: Stored in `./drizzle/`
+
+The database is created automatically when you run migrations. In Docker, the `./data` directory is mounted as a volume to persist data.
+
+### Schema
+
+- **entries**: Main gratitude entries with date, text, optional mood (1-5), rough day flag, and timestamps
+- **tags**: Normalized tag names
+- **entry_tags**: Junction table linking entries to tags
+
+## Export
+
+Navigate to `/export` or use the Export tab to download your data:
+
+- **Markdown**: Human-readable format, grouped by date, includes mood and tags
+- **JSON**: Full data export with all fields and timestamps
+
+Exports include all entries regardless of filters.
+
+## Configuration
+
+### App Name
+
+Change the app name by editing `src/lib/constants.ts`:
+
+```typescript
+export const APP_NAME = "My Gratitude Log";
+```
+
+### Port
+
+In `docker-compose.yml`, change the port mapping:
+
+```yaml
+ports:
+  - "8080:3000"  # Change 8080 to your desired port
+```
+
+## Tech Stack
+
+- **Framework**: Next.js 16 with App Router
+- **Language**: TypeScript
+- **Styling**: Tailwind CSS 4
+- **Database**: SQLite with Drizzle ORM
+- **Icons**: Lucide React
+
+## Future Extension Points
+
+These features are not implemented but the architecture supports them:
+
+- **Cloud sync**: Add authentication and a sync service to enable cross-device access
+- **LLM summaries**: Integrate with an LLM API to generate monthly reflections
+- **Notifications**: Add push notifications for daily reminders
+- **Import**: Add an import endpoint to restore from JSON exports
+
+## License
+
+MIT
--- a/docker-compose.yml
+++ b/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
--- a/drizzle.config.ts
+++ b/drizzle.config.ts
@@ -0,0 +1,10 @@
+import { defineConfig } from "drizzle-kit";
+
+export default defineConfig({
+  schema: "./src/lib/db/schema.ts",
+  out: "./drizzle",
+  dialect: "sqlite",
+  dbCredentials: {
+    url: process.env.DATABASE_PATH || "./data/quietthanks.db",
+  },
+});
--- a/drizzle/0000_busy_earthquake.sql
+++ b/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`);
--- a/drizzle/meta/0000_snapshot.json
+++ b/drizzle/meta/0000_snapshot.json
@@ -0,0 +1,176 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "5116dd80-0292-4345-a403-fd678d148880",
+  "prevId": "00000000-0000-0000-0000-000000000000",
+  "tables": {
+    "entries": {
+      "name": "entries",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "date": {
+          "name": "date",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "text": {
+          "name": "text",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "mood": {
+          "name": "mood",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "rough_day": {
+          "name": "rough_day",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "entry_tags": {
+      "name": "entry_tags",
+      "columns": {
+        "entry_id": {
+          "name": "entry_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "tag_id": {
+          "name": "tag_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "entry_tags_entry_id_entries_id_fk": {
+          "name": "entry_tags_entry_id_entries_id_fk",
+          "tableFrom": "entry_tags",
+          "tableTo": "entries",
+          "columnsFrom": [
+            "entry_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "entry_tags_tag_id_tags_id_fk": {
+          "name": "entry_tags_tag_id_tags_id_fk",
+          "tableFrom": "entry_tags",
+          "tableTo": "tags",
+          "columnsFrom": [
+            "tag_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {
+        "entry_tags_entry_id_tag_id_pk": {
+          "columns": [
+            "entry_id",
+            "tag_id"
+          ],
+          "name": "entry_tags_entry_id_tag_id_pk"
+        }
+      },
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "tags": {
+      "name": "tags",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "tags_name_unique": {
+          "name": "tags_name_unique",
+          "columns": [
+            "name"
+          ],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -0,0 +1,13 @@
+{
+  "version": "7",
+  "dialect": "sqlite",
+  "entries": [
+    {
+      "idx": 0,
+      "version": "6",
+      "when": 1769219562573,
+      "tag": "0000_busy_earthquake",
+      "breakpoints": true
+    }
+  ]
+}
--- a/next.config.ts
+++ b/next.config.ts
@@ -0,0 +1,7 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  output: "standalone",
+};
+
+export default nextConfig;
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -0,0 +1,37 @@
+{
+  "name": "quietthanks",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "eslint",
+    "db:generate": "drizzle-kit generate",
+    "db:migrate": "tsx src/lib/db/migrate.ts",
+    "db:studio": "drizzle-kit studio"
+  },
+  "dependencies": {
+    "better-sqlite3": "^12.6.2",
+    "drizzle-orm": "^0.45.1",
+    "lucide-react": "^0.562.0",
+    "next": "16.1.3",
+    "react": "19.2.3",
+    "react-dom": "19.2.3",
+    "uuid": "^13.0.0"
+  },
+  "devDependencies": {
+    "@tailwindcss/postcss": "^4",
+    "@types/better-sqlite3": "^7.6.13",
+    "@types/node": "^20",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "@types/uuid": "^10.0.0",
+    "drizzle-kit": "^0.31.8",
+    "eslint": "^9",
+    "eslint-config-next": "16.1.3",
+    "tailwindcss": "^4",
+    "tsx": "^4.19.0",
+    "typescript": "^5"
+  }
+}
--- a/postcss.config.mjs
+++ b/postcss.config.mjs
@@ -0,0 +1,7 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;
--- a/public/icons/icon.svg
+++ b/public/icons/icon.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+  <rect width="100" height="100" rx="20" fill="#0a0a0a"/>
+  <path d="M50 25 L60 45 L80 48 L65 63 L68 83 L50 73 L32 83 L35 63 L20 48 L40 45 Z"
+        fill="none" stroke="#6366f1" stroke-width="3" stroke-linejoin="round"/>
+</svg>
--- a/src/app/api/entries/[id]/route.ts
+++ b/src/app/api/entries/[id]/route.ts
@@ -0,0 +1,155 @@
+import { NextRequest, NextResponse } from "next/server";
+import { db, schema } from "@/lib/db";
+import { eq } from "drizzle-orm";
+import type { UpdateEntryRequest, EntryWithTags } from "@/lib/types";
+import { v4 as uuidv4 } from "uuid";
+
+interface RouteParams {
+  params: Promise<{ id: string }>;
+}
+
+// GET /api/entries/[id] - Get single entry
+export async function GET(_request: NextRequest, { params }: RouteParams) {
+  const { id } = await params;
+
+  try {
+    const entry = await db
+      .select()
+      .from(schema.entries)
+      .where(eq(schema.entries.id, id))
+      .limit(1);
+
+    if (entry.length === 0) {
+      return NextResponse.json({ error: "Entry not found" }, { status: 404 });
+    }
+
+    const entryTagRows = await db
+      .select({ tag: schema.tags })
+      .from(schema.entryTags)
+      .innerJoin(schema.tags, eq(schema.entryTags.tagId, schema.tags.id))
+      .where(eq(schema.entryTags.entryId, id));
+
+    const entryWithTags: EntryWithTags = {
+      ...entry[0],
+      tags: entryTagRows.map((row) => row.tag),
+    };
+
+    return NextResponse.json(entryWithTags);
+  } catch (error) {
+    console.error("Failed to fetch entry:", error);
+    return NextResponse.json({ error: "Failed to fetch entry" }, { status: 500 });
+  }
+}
+
+// PATCH /api/entries/[id] - Update entry
+export async function PATCH(request: NextRequest, { params }: RouteParams) {
+  const { id } = await params;
+
+  try {
+    const body: UpdateEntryRequest = await request.json();
+    const { text, mood, roughDay, tagNames } = body;
+
+    const existing = await db
+      .select()
+      .from(schema.entries)
+      .where(eq(schema.entries.id, id))
+      .limit(1);
+
+    if (existing.length === 0) {
+      return NextResponse.json({ error: "Entry not found" }, { status: 404 });
+    }
+
+    const now = Date.now();
+
+    // Update entry fields
+    const updates: Partial<typeof schema.entries.$inferInsert> = {
+      updatedAt: now,
+    };
+    if (text !== undefined) updates.text = text;
+    if (mood !== undefined) updates.mood = mood;
+    if (roughDay !== undefined) updates.roughDay = roughDay ? 1 : 0;
+
+    await db.update(schema.entries).set(updates).where(eq(schema.entries.id, id));
+
+    // Update tags if provided
+    if (tagNames !== undefined) {
+      await db.delete(schema.entryTags).where(eq(schema.entryTags.entryId, id));
+
+      for (const name of tagNames) {
+        const normalizedName = name.toLowerCase().trim();
+        if (!normalizedName) continue;
+
+        let tag = await db
+          .select()
+          .from(schema.tags)
+          .where(eq(schema.tags.name, normalizedName))
+          .limit(1);
+
+        let tagId: string;
+        if (tag.length === 0) {
+          tagId = uuidv4();
+          await db.insert(schema.tags).values({
+            id: tagId,
+            name: normalizedName,
+            createdAt: now,
+          });
+        } else {
+          tagId = tag[0].id;
+        }
+
+        await db
+          .insert(schema.entryTags)
+          .values({ entryId: id, tagId })
+          .onConflictDoNothing();
+      }
+    }
+
+    // Return updated entry
+    const entry = await db
+      .select()
+      .from(schema.entries)
+      .where(eq(schema.entries.id, id))
+      .limit(1);
+
+    const entryTagRows = await db
+      .select({ tag: schema.tags })
+      .from(schema.entryTags)
+      .innerJoin(schema.tags, eq(schema.entryTags.tagId, schema.tags.id))
+      .where(eq(schema.entryTags.entryId, id));
+
+    const entryWithTags: EntryWithTags = {
+      ...entry[0],
+      tags: entryTagRows.map((row) => row.tag),
+    };
+
+    return NextResponse.json(entryWithTags);
+  } catch (error) {
+    console.error("Failed to update entry:", error);
+    return NextResponse.json({ error: "Failed to update entry" }, { status: 500 });
+  }
+}
+
+// DELETE /api/entries/[id] - Delete entry
+export async function DELETE(_request: NextRequest, { params }: RouteParams) {
+  const { id } = await params;
+
+  try {
+    const existing = await db
+      .select()
+      .from(schema.entries)
+      .where(eq(schema.entries.id, id))
+      .limit(1);
+
+    if (existing.length === 0) {
+      return NextResponse.json({ error: "Entry not found" }, { status: 404 });
+    }
+
+    // Delete entry (cascades to entry_tags)
+    await db.delete(schema.entries).where(eq(schema.entries.id, id));
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error("Failed to delete entry:", error);
+    return NextResponse.json({ error: "Failed to delete entry" }, { status: 500 });
+  }
+}
--- a/src/app/api/entries/route.ts
+++ b/src/app/api/entries/route.ts
@@ -0,0 +1,170 @@
+import { NextRequest, NextResponse } from "next/server";
+import { db, schema } from "@/lib/db";
+import { eq, desc, and, inArray, gte } from "drizzle-orm";
+import { v4 as uuidv4 } from "uuid";
+import type { CreateEntryRequest, EntryWithTags } from "@/lib/types";
+
+// GET /api/entries - List entries with optional filters
+export async function GET(request: NextRequest) {
+  const { searchParams } = new URL(request.url);
+  const moods = searchParams.get("moods")?.split(",").map(Number).filter(Boolean);
+  const tagId = searchParams.get("tagId");
+  const roughDay = searchParams.get("roughDay");
+  const since = searchParams.get("since"); // YYYY-MM-DD
+
+  try {
+    // Build conditions
+    const conditions = [];
+    if (moods && moods.length > 0) {
+      conditions.push(inArray(schema.entries.mood, moods));
+    }
+    if (roughDay === "true") {
+      conditions.push(eq(schema.entries.roughDay, 1));
+    } else if (roughDay === "false") {
+      conditions.push(eq(schema.entries.roughDay, 0));
+    }
+    if (since) {
+      conditions.push(gte(schema.entries.date, since));
+    }
+
+    // Get entries
+    const entries = await db
+      .select()
+      .from(schema.entries)
+      .where(conditions.length > 0 ? and(...conditions) : undefined)
+      .orderBy(desc(schema.entries.date), desc(schema.entries.createdAt));
+
+    // Get tags for each entry
+    const entriesWithTags: EntryWithTags[] = [];
+    for (const entry of entries) {
+      const entryTagRows = await db
+        .select({ tag: schema.tags })
+        .from(schema.entryTags)
+        .innerJoin(schema.tags, eq(schema.entryTags.tagId, schema.tags.id))
+        .where(eq(schema.entryTags.entryId, entry.id));
+
+      const tags = entryTagRows.map((row) => row.tag);
+
+      // Filter by tagId if specified
+      if (tagId && !tags.some((t) => t.id === tagId)) {
+        continue;
+      }
+
+      entriesWithTags.push({ ...entry, tags });
+    }
+
+    return NextResponse.json(entriesWithTags);
+  } catch (error) {
+    console.error("Failed to fetch entries:", error);
+    return NextResponse.json({ error: "Failed to fetch entries" }, { status: 500 });
+  }
+}
+
+// POST /api/entries - Create or update today's entry
+export async function POST(request: NextRequest) {
+  try {
+    const body: CreateEntryRequest = await request.json();
+    const { date, text, mood, roughDay, tagNames } = body;
+
+    if (!date || !text) {
+      return NextResponse.json({ error: "Date and text are required" }, { status: 400 });
+    }
+
+    const now = Date.now();
+
+    // Check if entry exists for this date
+    const existing = await db
+      .select()
+      .from(schema.entries)
+      .where(eq(schema.entries.date, date))
+      .limit(1);
+
+    let entryId: string;
+
+    if (existing.length > 0) {
+      // Update existing entry
+      entryId = existing[0].id;
+      await db
+        .update(schema.entries)
+        .set({
+          text,
+          mood: mood ?? null,
+          roughDay: roughDay ? 1 : 0,
+          updatedAt: now,
+        })
+        .where(eq(schema.entries.id, entryId));
+    } else {
+      // Create new entry
+      entryId = uuidv4();
+      await db.insert(schema.entries).values({
+        id: entryId,
+        date,
+        text,
+        mood: mood ?? null,
+        roughDay: roughDay ? 1 : 0,
+        createdAt: now,
+        updatedAt: now,
+      });
+    }
+
+    // Update tags
+    // Remove existing tag associations
+    await db.delete(schema.entryTags).where(eq(schema.entryTags.entryId, entryId));
+
+    // Add new tags
+    if (tagNames && tagNames.length > 0) {
+      for (const name of tagNames) {
+        const normalizedName = name.toLowerCase().trim();
+        if (!normalizedName) continue;
+
+        // Find or create tag
+        let tag = await db
+          .select()
+          .from(schema.tags)
+          .where(eq(schema.tags.name, normalizedName))
+          .limit(1);
+
+        let tagId: string;
+        if (tag.length === 0) {
+          tagId = uuidv4();
+          await db.insert(schema.tags).values({
+            id: tagId,
+            name: normalizedName,
+            createdAt: now,
+          });
+        } else {
+          tagId = tag[0].id;
+        }
+
+        // Create association
+        await db
+          .insert(schema.entryTags)
+          .values({ entryId, tagId })
+          .onConflictDoNothing();
+      }
+    }
+
+    // Fetch and return the updated entry with tags
+    const entry = await db
+      .select()
+      .from(schema.entries)
+      .where(eq(schema.entries.id, entryId))
+      .limit(1);
+
+    const entryTagRows = await db
+      .select({ tag: schema.tags })
+      .from(schema.entryTags)
+      .innerJoin(schema.tags, eq(schema.entryTags.tagId, schema.tags.id))
+      .where(eq(schema.entryTags.entryId, entryId));
+
+    const entryWithTags: EntryWithTags = {
+      ...entry[0],
+      tags: entryTagRows.map((row) => row.tag),
+    };
+
+    return NextResponse.json(entryWithTags);
+  } catch (error) {
+    console.error("Failed to create/update entry:", error);
+    return NextResponse.json({ error: "Failed to save entry" }, { status: 500 });
+  }
+}
--- a/src/app/api/export/route.ts
+++ b/src/app/api/export/route.ts
@@ -0,0 +1,96 @@
+import { NextRequest, NextResponse } from "next/server";
+import { db, schema } from "@/lib/db";
+import { eq, desc } from "drizzle-orm";
+import type { EntryWithTags, ExportFormat } from "@/lib/types";
+import { MOOD_LABELS, APP_NAME } from "@/lib/constants";
+import { formatDateLong } from "@/lib/utils/date";
+
+// POST /api/export - Export all entries
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json();
+    const format: ExportFormat = body.format || "markdown";
+
+    // Fetch all entries with tags
+    const entries = await db
+      .select()
+      .from(schema.entries)
+      .orderBy(desc(schema.entries.date));
+
+    const entriesWithTags: EntryWithTags[] = [];
+    for (const entry of entries) {
+      const entryTagRows = await db
+        .select({ tag: schema.tags })
+        .from(schema.entryTags)
+        .innerJoin(schema.tags, eq(schema.entryTags.tagId, schema.tags.id))
+        .where(eq(schema.entryTags.entryId, entry.id));
+
+      entriesWithTags.push({
+        ...entry,
+        tags: entryTagRows.map((row) => row.tag),
+      });
+    }
+
+    if (format === "json") {
+      const jsonContent = JSON.stringify(
+        {
+          exportedAt: new Date().toISOString(),
+          appName: APP_NAME,
+          entries: entriesWithTags,
+        },
+        null,
+        2
+      );
+
+      return new NextResponse(jsonContent, {
+        headers: {
+          "Content-Type": "application/json",
+          "Content-Disposition": `attachment; filename="${APP_NAME.toLowerCase().replace(/\s+/g, "-")}-export-${new Date().toISOString().slice(0, 10)}.json"`,
+        },
+      });
+    }
+
+    // Markdown export
+    let markdown = `# ${APP_NAME} Export\n\n`;
+    markdown += `Exported on ${new Date().toLocaleDateString("en-US", { dateStyle: "long" })}\n\n`;
+    markdown += `---\n\n`;
+
+    // Group by date
+    let currentDate = "";
+    for (const entry of entriesWithTags) {
+      if (entry.date !== currentDate) {
+        currentDate = entry.date;
+        markdown += `## ${formatDateLong(entry.date)}\n\n`;
+      }
+
+      markdown += entry.text + "\n\n";
+
+      const meta: string[] = [];
+      if (entry.mood) {
+        meta.push(`Mood: ${MOOD_LABELS[entry.mood]} (${entry.mood}/5)`);
+      }
+      if (entry.roughDay) {
+        meta.push("Rough day");
+      }
+      if (entry.tags.length > 0) {
+        meta.push(`Tags: ${entry.tags.map((t) => t.name).join(", ")}`);
+      }
+
+      if (meta.length > 0) {
+        markdown += `*${meta.join(" | ")}*\n\n`;
+      }
+
+      markdown += "---\n\n";
+    }
+
+    return new NextResponse(markdown, {
+      headers: {
+        "Content-Type": "text/markdown; charset=utf-8",
+        "Content-Disposition": `attachment; filename="${APP_NAME.toLowerCase().replace(/\s+/g, "-")}-export-${new Date().toISOString().slice(0, 10)}.md"`,
+      },
+    });
+  } catch (error) {
+    console.error("Failed to export:", error);
+    return NextResponse.json({ error: "Failed to export" }, { status: 500 });
+  }
+}
--- a/src/app/api/tags/route.ts
+++ b/src/app/api/tags/route.ts
@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from "next/server";
+import { db, schema } from "@/lib/db";
+import { desc, like, sql } from "drizzle-orm";
+
+// GET /api/tags - Get tags (recent or search)
+export async function GET(request: NextRequest) {
+  const { searchParams } = new URL(request.url);
+  const search = searchParams.get("search");
+  const limit = parseInt(searchParams.get("limit") || "10", 10);
+
+  try {
+    if (search) {
+      // Search tags by name
+      const tags = await db
+        .select()
+        .from(schema.tags)
+        .where(like(schema.tags.name, `%${search.toLowerCase()}%`))
+        .limit(limit);
+
+      return NextResponse.json(tags);
+    }
+
+    // Get most recently used tags (by entry count)
+    const tagsWithCount = await db
+      .select({
+        id: schema.tags.id,
+        name: schema.tags.name,
+        createdAt: schema.tags.createdAt,
+        useCount: sql<number>`count(${schema.entryTags.entryId})`.as("use_count"),
+      })
+      .from(schema.tags)
+      .leftJoin(schema.entryTags, sql`${schema.tags.id} = ${schema.entryTags.tagId}`)
+      .groupBy(schema.tags.id)
+      .orderBy(desc(sql`use_count`), desc(schema.tags.createdAt))
+      .limit(limit);
+
+    return NextResponse.json(tagsWithCount);
+  } catch (error) {
+    console.error("Failed to fetch tags:", error);
+    return NextResponse.json({ error: "Failed to fetch tags" }, { status: 500 });
+  }
+}
--- a/src/app/entry/[id]/page.tsx
+++ b/src/app/entry/[id]/page.tsx
@@ -0,0 +1,138 @@
+"use client";
+
+import { use, useState, useEffect, useCallback } from "react";
+import { useRouter } from "next/navigation";
+import { EntryForm } from "@/components/EntryForm";
+import { ToastContainer } from "@/components/Toast";
+import { useToast } from "@/hooks/useToast";
+import { ArrowLeft, Trash2 } from "lucide-react";
+import Link from "next/link";
+import type { EntryWithTags } from "@/lib/types";
+import { formatDateLong } from "@/lib/utils/date";
+import { APP_NAME } from "@/lib/constants";
+
+interface EntryPageProps {
+  params: Promise<{ id: string }>;
+}
+
+export default function EntryPage({ params }: EntryPageProps) {
+  const { id } = use(params);
+  const router = useRouter();
+  const { toasts, showToast, dismissToast } = useToast();
+  const [entry, setEntry] = useState<EntryWithTags | null>(null);
+  const [isDeleting, setIsDeleting] = useState(false);
+  const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
+
+  useEffect(() => {
+    async function loadEntry() {
+      try {
+        const res = await fetch(`/api/entries/${id}`);
+        if (res.ok) {
+          setEntry(await res.json());
+        }
+      } catch (error) {
+        console.error("Failed to load entry:", error);
+      }
+    }
+    loadEntry();
+  }, [id]);
+
+  const handleDelete = useCallback(async () => {
+    if (!entry) return;
+
+    setIsDeleting(true);
+    setShowDeleteConfirm(false);
+
+    try {
+      const res = await fetch(`/api/entries/${id}`, { method: "DELETE" });
+      if (res.ok) {
+        // Store for undo
+        const deletedEntry = entry;
+
+        showToast("Entry deleted", {
+          label: "Undo",
+          onClick: async () => {
+            // Re-create the entry
+            await fetch("/api/entries", {
+              method: "POST",
+              headers: { "Content-Type": "application/json" },
+              body: JSON.stringify({
+                date: deletedEntry.date,
+                text: deletedEntry.text,
+                mood: deletedEntry.mood,
+                roughDay: Boolean(deletedEntry.roughDay),
+                tagNames: deletedEntry.tags.map((t) => t.name),
+              }),
+            });
+            router.push("/timeline");
+          },
+        });
+
+        router.push("/timeline");
+      }
+    } catch (error) {
+      console.error("Failed to delete entry:", error);
+    } finally {
+      setIsDeleting(false);
+    }
+  }, [entry, id, router, showToast]);
+
+  return (
+    <div>
+      <header className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-3">
+          <Link
+            href="/timeline"
+            className="p-2 -ml-2 text-muted hover:text-foreground"
+          >
+            <ArrowLeft size={20} />
+          </Link>
+          <div>
+            <h1 className="text-xl font-light">{APP_NAME}</h1>
+            {entry && (
+              <p className="text-sm text-muted">{formatDateLong(entry.date)}</p>
+            )}
+          </div>
+        </div>
+        <button
+          onClick={() => setShowDeleteConfirm(true)}
+          disabled={isDeleting}
+          className="p-2 text-muted hover:text-red-400 transition-colors"
+          aria-label="Delete entry"
+        >
+          <Trash2 size={20} />
+        </button>
+      </header>
+
+      <EntryForm entryId={id} />
+
+      {/* Delete confirmation */}
+      {showDeleteConfirm && (
+        <div className="fixed inset-0 bg-black/50 flex items-center justify-center p-4 z-50">
+          <div className="bg-surface border border-border rounded-xl p-6 max-w-sm w-full">
+            <h2 className="text-lg font-medium mb-2">Delete entry?</h2>
+            <p className="text-sm text-muted mb-6">
+              This action can be undone for a few seconds after deletion.
+            </p>
+            <div className="flex gap-3 justify-end">
+              <button
+                onClick={() => setShowDeleteConfirm(false)}
+                className="px-4 py-2 text-sm text-muted hover:text-foreground"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleDelete}
+                className="px-4 py-2 text-sm bg-red-500 text-white rounded-lg hover:bg-red-600"
+              >
+                Delete
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
+      <ToastContainer toasts={toasts} onDismiss={dismissToast} />
+    </div>
+  );
+}
--- a/src/app/export/page.tsx
+++ b/src/app/export/page.tsx
@@ -0,0 +1,102 @@
+"use client";
+
+import { useState } from "react";
+import { Download, FileJson, FileText, Loader2 } from "lucide-react";
+import { APP_NAME } from "@/lib/constants";
+
+export default function ExportPage() {
+  const [isExporting, setIsExporting] = useState(false);
+
+  const handleExport = async (format: "markdown" | "json") => {
+    setIsExporting(true);
+    try {
+      const res = await fetch("/api/export", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ format }),
+      });
+
+      if (res.ok) {
+        const blob = await res.blob();
+        const contentDisposition = res.headers.get("Content-Disposition");
+        const filenameMatch = contentDisposition?.match(/filename="(.+)"/);
+        const filename =
+          filenameMatch?.[1] ||
+          `quietthanks-export.${format === "json" ? "json" : "md"}`;
+
+        // Trigger download
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement("a");
+        a.href = url;
+        a.download = filename;
+        document.body.appendChild(a);
+        a.click();
+        document.body.removeChild(a);
+        URL.revokeObjectURL(url);
+      }
+    } catch (error) {
+      console.error("Failed to export:", error);
+    } finally {
+      setIsExporting(false);
+    }
+  };
+
+  return (
+    <div>
+      <header className="mb-8">
+        <h1 className="text-2xl font-light">{APP_NAME}</h1>
+        <p className="text-sm text-muted">Export</p>
+      </header>
+
+      <div className="space-y-4">
+        <p className="text-muted">
+          Download all your entries for backup or use elsewhere.
+        </p>
+
+        <div className="grid gap-4">
+          <button
+            onClick={() => handleExport("markdown")}
+            disabled={isExporting}
+            className="flex items-center gap-4 p-4 bg-surface border border-border rounded-xl hover:border-muted transition-colors text-left"
+          >
+            <div className="p-3 bg-background rounded-lg">
+              <FileText size={24} className="text-accent" />
+            </div>
+            <div className="flex-1">
+              <h3 className="font-medium">Markdown</h3>
+              <p className="text-sm text-muted">
+                Readable format, grouped by date
+              </p>
+            </div>
+            {isExporting ? (
+              <Loader2 className="animate-spin text-muted" size={20} />
+            ) : (
+              <Download size={20} className="text-muted" />
+            )}
+          </button>
+
+          <button
+            onClick={() => handleExport("json")}
+            disabled={isExporting}
+            className="flex items-center gap-4 p-4 bg-surface border border-border rounded-xl hover:border-muted transition-colors text-left"
+          >
+            <div className="p-3 bg-background rounded-lg">
+              <FileJson size={24} className="text-accent" />
+            </div>
+            <div className="flex-1">
+              <h3 className="font-medium">JSON</h3>
+              <p className="text-sm text-muted">
+                Full data with timestamps
+              </p>
+            </div>
+            {isExporting ? (
+              <Loader2 className="animate-spin text-muted" size={20} />
+            ) : (
+              <Download size={20} className="text-muted" />
+            )}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -0,0 +1,95 @@
+@import "tailwindcss";
+
+:root {
+  --background: #0a0a0a;
+  --foreground: #e5e5e5;
+  --muted: #737373;
+  --border: #262626;
+  --accent: #6366f1;
+  --surface: #141414;
+}
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --color-muted: var(--muted);
+  --color-border: var(--border);
+  --color-accent: var(--accent);
+  --color-surface: var(--surface);
+}
+
+body {
+  background: var(--background);
+  color: var(--foreground);
+  font-family: system-ui, -apple-system, sans-serif;
+}
+
+/* Safe area for mobile */
+.safe-area-bottom {
+  padding-bottom: env(safe-area-inset-bottom, 0);
+}
+
+/* Toast animation */
+@keyframes slide-up {
+  from {
+    transform: translateY(100%);
+    opacity: 0;
+  }
+  to {
+    transform: translateY(0);
+    opacity: 1;
+  }
+}
+
+.animate-slide-up {
+  animation: slide-up 0.2s ease-out;
+}
+
+/* Scrollbar */
+::-webkit-scrollbar {
+  width: 8px;
+  height: 8px;
+}
+
+::-webkit-scrollbar-track {
+  background: var(--background);
+}
+
+::-webkit-scrollbar-thumb {
+  background: var(--border);
+  border-radius: 4px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background: var(--muted);
+}
+
+/* Custom checkbox */
+input[type="checkbox"] {
+  appearance: none;
+  -webkit-appearance: none;
+  width: 1.25rem;
+  height: 1.25rem;
+  border: 2px solid var(--border);
+  border-radius: 0.25rem;
+  background: var(--surface);
+  cursor: pointer;
+  position: relative;
+}
+
+input[type="checkbox"]:checked {
+  background: var(--accent);
+  border-color: var(--accent);
+}
+
+input[type="checkbox"]:checked::after {
+  content: "";
+  position: absolute;
+  left: 5px;
+  top: 2px;
+  width: 5px;
+  height: 9px;
+  border: solid white;
+  border-width: 0 2px 2px 0;
+  transform: rotate(45deg);
+}
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -0,0 +1,40 @@
+import type { Metadata, Viewport } from "next";
+import "./globals.css";
+import { Navigation } from "@/components/Navigation";
+import { APP_NAME } from "@/lib/constants";
+
+export const metadata: Metadata = {
+  title: APP_NAME,
+  description: "A calm, private gratitude and mood log",
+  icons: {
+    icon: "/icons/icon.svg",
+    apple: "/icons/icon.svg",
+  },
+};
+
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  maximumScale: 1,
+  userScalable: false,
+  themeColor: "#0a0a0a",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <head>
+        <meta name="apple-mobile-web-app-capable" content="yes" />
+        <meta name="mobile-web-app-capable" content="yes" />
+      </head>
+      <body className="antialiased min-h-screen pb-20">
+        <main className="max-w-lg mx-auto px-4 py-6">{children}</main>
+        <Navigation />
+      </body>
+    </html>
+  );
+}
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -0,0 +1,30 @@
+import { EntryForm } from "@/components/EntryForm";
+import { APP_NAME } from "@/lib/constants";
+import { formatDate, getLocalDate } from "@/lib/utils/date";
+import Link from "next/link";
+import { ChevronRight } from "lucide-react";
+
+export default function HomePage() {
+  const today = getLocalDate();
+
+  return (
+    <div>
+      <header className="mb-8">
+        <h1 className="text-2xl font-light mb-1">{APP_NAME}</h1>
+        <p className="text-sm text-muted">{formatDate(today)}</p>
+      </header>
+
+      <EntryForm />
+
+      <div className="mt-8 pt-6 border-t border-border">
+        <Link
+          href="/timeline"
+          className="flex items-center justify-between text-muted hover:text-foreground transition-colors"
+        >
+          <span>View timeline</span>
+          <ChevronRight size={20} />
+        </Link>
+      </div>
+    </div>
+  );
+}
--- a/src/app/settings/page.tsx
+++ b/src/app/settings/page.tsx
@@ -0,0 +1,73 @@
+import { APP_NAME } from "@/lib/constants";
+
+export default function SettingsPage() {
+  return (
+    <div>
+      <header className="mb-8">
+        <h1 className="text-2xl font-light">{APP_NAME}</h1>
+        <p className="text-sm text-muted">Settings</p>
+      </header>
+
+      <div className="space-y-6">
+        {/* Notifications - disabled in MVP */}
+        <div className="p-4 bg-surface border border-border rounded-xl opacity-50">
+          <div className="flex items-center justify-between">
+            <div>
+              <h3 className="font-medium">Daily reminder</h3>
+              <p className="text-sm text-muted">
+                Get a gentle nudge to check in
+              </p>
+            </div>
+            <button
+              disabled
+              className="relative w-12 h-6 bg-border rounded-full cursor-not-allowed"
+            >
+              <span className="absolute left-1 top-1 w-4 h-4 bg-muted rounded-full" />
+            </button>
+          </div>
+        </div>
+
+        {/* Sync - disabled in MVP */}
+        <div className="p-4 bg-surface border border-border rounded-xl opacity-50">
+          <div className="flex items-center justify-between">
+            <div>
+              <h3 className="font-medium">Cloud sync</h3>
+              <p className="text-sm text-muted">
+                Sync across devices (coming soon)
+              </p>
+            </div>
+            <button
+              disabled
+              className="relative w-12 h-6 bg-border rounded-full cursor-not-allowed"
+            >
+              <span className="absolute left-1 top-1 w-4 h-4 bg-muted rounded-full" />
+            </button>
+          </div>
+        </div>
+
+        {/* LLM Summaries - disabled in MVP */}
+        <div className="p-4 bg-surface border border-border rounded-xl opacity-50">
+          <div className="flex items-center justify-between">
+            <div>
+              <h3 className="font-medium">AI summaries</h3>
+              <p className="text-sm text-muted">
+                Monthly reflections with LLM (coming soon)
+              </p>
+            </div>
+            <button
+              disabled
+              className="relative w-12 h-6 bg-border rounded-full cursor-not-allowed"
+            >
+              <span className="absolute left-1 top-1 w-4 h-4 bg-muted rounded-full" />
+            </button>
+          </div>
+        </div>
+
+        <div className="pt-6 border-t border-border text-center text-sm text-muted">
+          <p>{APP_NAME} v0.1.0</p>
+          <p className="mt-1">A calm, private gratitude log.</p>
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/src/app/timeline/page.tsx
+++ b/src/app/timeline/page.tsx
@@ -0,0 +1,93 @@
+"use client";
+
+import { useState, useEffect, useCallback } from "react";
+import { WeeklyReflection } from "@/components/WeeklyReflection";
+import { FilterPanel } from "@/components/FilterPanel";
+import { EntryRow } from "@/components/EntryRow";
+import { Loader2 } from "lucide-react";
+import type { EntryWithTags, FilterState } from "@/lib/types";
+import { APP_NAME } from "@/lib/constants";
+
+export default function TimelinePage() {
+  const [entries, setEntries] = useState<EntryWithTags[]>([]);
+  const [filteredEntries, setFilteredEntries] = useState<EntryWithTags[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const [filters, setFilters] = useState<FilterState>({
+    moods: [],
+    tagId: null,
+    roughDay: null,
+  });
+
+  useEffect(() => {
+    async function loadEntries() {
+      try {
+        const res = await fetch("/api/entries");
+        if (res.ok) {
+          setEntries(await res.json());
+        }
+      } catch (error) {
+        console.error("Failed to load entries:", error);
+      } finally {
+        setIsLoading(false);
+      }
+    }
+    loadEntries();
+  }, []);
+
+  // Apply filters client-side
+  useEffect(() => {
+    let result = entries;
+
+    if (filters.moods.length > 0) {
+      result = result.filter((e) => e.mood && filters.moods.includes(e.mood));
+    }
+
+    if (filters.tagId) {
+      result = result.filter((e) => e.tags.some((t) => t.id === filters.tagId));
+    }
+
+    if (filters.roughDay === true) {
+      result = result.filter((e) => e.roughDay);
+    } else if (filters.roughDay === false) {
+      result = result.filter((e) => !e.roughDay);
+    }
+
+    setFilteredEntries(result);
+  }, [entries, filters]);
+
+  return (
+    <div>
+      <header className="mb-6">
+        <h1 className="text-2xl font-light">{APP_NAME}</h1>
+        <p className="text-sm text-muted">Timeline</p>
+      </header>
+
+      {isLoading ? (
+        <div className="flex items-center justify-center py-12">
+          <Loader2 className="animate-spin text-muted" size={24} />
+        </div>
+      ) : (
+        <>
+          <WeeklyReflection entries={entries} />
+          <FilterPanel filters={filters} onChange={setFilters} />
+
+          {filteredEntries.length === 0 ? (
+            <div className="text-center py-12 text-muted">
+              {entries.length === 0 ? (
+                <p>No entries yet. Start your first check-in!</p>
+              ) : (
+                <p>No entries match your filters.</p>
+              )}
+            </div>
+          ) : (
+            <div className="space-y-3">
+              {filteredEntries.map((entry) => (
+                <EntryRow key={entry.id} entry={entry} />
+              ))}
+            </div>
+          )}
+        </>
+      )}
+    </div>
+  );
+}
--- a/src/components/EntryForm.tsx
+++ b/src/components/EntryForm.tsx
@@ -0,0 +1,101 @@
+"use client";
+
+import { useEntry } from "@/hooks/useEntry";
+import { MoodSelector } from "./MoodSelector";
+import { TagInput } from "./TagInput";
+import { Check, Loader2 } from "lucide-react";
+
+interface EntryFormProps {
+  date?: string;
+  entryId?: string;
+}
+
+export function EntryForm({ date, entryId }: EntryFormProps) {
+  const {
+    text,
+    mood,
+    roughDay,
+    tagNames,
+    isLoading,
+    isSaving,
+    lastSaved,
+    updateText,
+    updateMood,
+    updateRoughDay,
+    addTag,
+    removeTag,
+  } = useEntry({ date, entryId });
+
+  if (isLoading) {
+    return (
+      <div className="flex items-center justify-center py-12">
+        <Loader2 className="animate-spin text-muted" size={24} />
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-6">
+      {/* Main prompt */}
+      <div>
+        <label htmlFor="gratitude-text" className="block text-lg mb-3 text-muted">
+          What are you grateful for today?
+        </label>
+        <textarea
+          id="gratitude-text"
+          value={text}
+          onChange={(e) => updateText(e.target.value)}
+          placeholder="Take a moment to reflect..."
+          rows={5}
+          className="w-full px-4 py-3 bg-surface border border-border rounded-xl text-foreground placeholder:text-muted/50 focus:outline-none focus:border-muted resize-none"
+        />
+      </div>
+
+      {/* Mood */}
+      <div>
+        <label className="block text-sm text-muted mb-2">How are you feeling?</label>
+        <MoodSelector value={mood} onChange={updateMood} />
+      </div>
+
+      {/* Rough day toggle */}
+      <div>
+        <label className="flex items-center gap-3 cursor-pointer">
+          <input
+            type="checkbox"
+            checked={roughDay}
+            onChange={(e) => updateRoughDay(e.target.checked)}
+            className="w-5 h-5 rounded border-border bg-surface accent-accent"
+          />
+          <span className="text-sm text-muted">Mark as a rough day</span>
+        </label>
+      </div>
+
+      {/* Tags */}
+      <div>
+        <label className="block text-sm text-muted mb-2">Tags (optional)</label>
+        <TagInput
+          selectedTags={tagNames}
+          onAddTag={addTag}
+          onRemoveTag={removeTag}
+        />
+      </div>
+
+      {/* Save status */}
+      <div className="flex items-center gap-2 text-sm text-muted">
+        {isSaving ? (
+          <>
+            <Loader2 className="animate-spin" size={14} />
+            Saving...
+          </>
+        ) : lastSaved ? (
+          <>
+            <Check size={14} className="text-green-500" />
+            Saved
+          </>
+        ) : text.trim() ? (
+          <span className="text-muted/50">Auto-saves as you type</span>
+        ) : null}
+      </div>
+    </div>
+  );
+}
--- a/src/components/EntryRow.tsx
+++ b/src/components/EntryRow.tsx
@@ -0,0 +1,49 @@
+"use client";
+
+import Link from "next/link";
+import { formatDate, isToday } from "@/lib/utils/date";
+import { MoodIcon } from "./MoodSelector";
+import { TagChips } from "./TagInput";
+import type { EntryWithTags } from "@/lib/types";
+
+interface EntryRowProps {
+  entry: EntryWithTags;
+}
+
+export function EntryRow({ entry }: EntryRowProps) {
+  // Truncate text to one line preview
+  const preview = entry.text.length > 80 ? entry.text.slice(0, 80) + "..." : entry.text;
+
+  return (
+    <Link
+      href={`/entry/${entry.id}`}
+      className="block p-4 bg-surface border border-border rounded-xl hover:border-muted transition-colors"
+    >
+      <div className="flex items-start justify-between gap-3">
+        <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2 mb-1">
+            <span className="text-sm text-muted">
+              {isToday(entry.date) ? "Today" : formatDate(entry.date)}
+            </span>
+            {entry.roughDay ? (
+              <span className="text-xs px-2 py-0.5 bg-red-500/20 text-red-400 rounded">
+                rough day
+              </span>
+            ) : null}
+          </div>
+          <p className="text-foreground truncate">{preview}</p>
+          {entry.tags.length > 0 && (
+            <div className="mt-2">
+              <TagChips tags={entry.tags} />
+            </div>
+          )}
+        </div>
+        {entry.mood && (
+          <div className="text-xl">
+            <MoodIcon mood={entry.mood} />
+          </div>
+        )}
+      </div>
+    </Link>
+  );
+}
--- a/src/components/FilterPanel.tsx
+++ b/src/components/FilterPanel.tsx
@@ -0,0 +1,172 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { Filter, X } from "lucide-react";
+import type { Tag } from "@/lib/db/schema";
+import type { FilterState } from "@/lib/types";
+import { MOOD_LABELS } from "@/lib/constants";
+
+interface FilterPanelProps {
+  filters: FilterState;
+  onChange: (filters: FilterState) => void;
+}
+
+const MOOD_OPTIONS = [1, 2, 3, 4, 5];
+
+export function FilterPanel({ filters, onChange }: FilterPanelProps) {
+  const [isOpen, setIsOpen] = useState(false);
+  const [tags, setTags] = useState<Tag[]>([]);
+
+  useEffect(() => {
+    async function loadTags() {
+      try {
+        const res = await fetch("/api/tags?limit=20");
+        if (res.ok) {
+          setTags(await res.json());
+        }
+      } catch {
+        // Ignore
+      }
+    }
+    loadTags();
+  }, []);
+
+  const hasFilters =
+    filters.moods.length > 0 || filters.tagId !== null || filters.roughDay !== null;
+
+  const clearFilters = () => {
+    onChange({ moods: [], tagId: null, roughDay: null });
+  };
+
+  const toggleMood = (mood: number) => {
+    const newMoods = filters.moods.includes(mood)
+      ? filters.moods.filter((m) => m !== mood)
+      : [...filters.moods, mood];
+    onChange({ ...filters, moods: newMoods });
+  };
+
+  return (
+    <div className="mb-4">
+      <div className="flex items-center gap-2">
+        <button
+          onClick={() => setIsOpen(!isOpen)}
+          className={`inline-flex items-center gap-2 px-3 py-2 rounded-lg text-sm transition-colors ${
+            isOpen || hasFilters
+              ? "bg-accent/20 text-accent"
+              : "bg-surface text-muted hover:text-foreground"
+          }`}
+        >
+          <Filter size={16} />
+          Filters
+          {hasFilters && (
+            <span className="bg-accent text-white text-xs px-1.5 rounded-full">
+              {(filters.moods.length > 0 ? 1 : 0) +
+                (filters.tagId ? 1 : 0) +
+                (filters.roughDay !== null ? 1 : 0)}
+            </span>
+          )}
+        </button>
+        {hasFilters && (
+          <button
+            onClick={clearFilters}
+            className="text-sm text-muted hover:text-foreground"
+          >
+            Clear all
+          </button>
+        )}
+      </div>
+
+      {isOpen && (
+        <div className="mt-3 p-4 bg-surface border border-border rounded-xl space-y-4">
+          {/* Mood filter */}
+          <div>
+            <label className="block text-sm font-medium text-muted mb-2">Mood</label>
+            <div className="flex gap-2">
+              {MOOD_OPTIONS.map((mood) => (
+                <button
+                  key={mood}
+                  onClick={() => toggleMood(mood)}
+                  aria-label={MOOD_LABELS[mood]}
+                  aria-pressed={filters.moods.includes(mood)}
+                  className={`text-xl p-2 rounded-lg transition-colors ${
+                    filters.moods.includes(mood)
+                      ? "bg-accent/20"
+                      : "opacity-40 hover:opacity-70"
+                  }`}
+                >
+                  {["😔", "😕", "😐", "🙂", "😊"][mood - 1]}
+                </button>
+              ))}
+            </div>
+          </div>
+
+          {/* Tag filter */}
+          {tags.length > 0 && (
+            <div>
+              <label className="block text-sm font-medium text-muted mb-2">Tag</label>
+              <div className="flex flex-wrap gap-2">
+                {tags.map((tag) => (
+                  <button
+                    key={tag.id}
+                    onClick={() =>
+                      onChange({
+                        ...filters,
+                        tagId: filters.tagId === tag.id ? null : tag.id,
+                      })
+                    }
+                    className={`px-3 py-1 rounded-full text-sm transition-colors ${
+                      filters.tagId === tag.id
+                        ? "bg-accent/20 text-accent"
+                        : "bg-background border border-border text-muted hover:text-foreground"
+                    }`}
+                  >
+                    {tag.name}
+                  </button>
+                ))}
+              </div>
+            </div>
+          )}
+
+          {/* Rough day filter */}
+          <div>
+            <label className="block text-sm font-medium text-muted mb-2">
+              Rough day
+            </label>
+            <div className="flex gap-2">
+              <button
+                onClick={() =>
+                  onChange({
+                    ...filters,
+                    roughDay: filters.roughDay === true ? null : true,
+                  })
+                }
+                className={`px-3 py-1 rounded-full text-sm transition-colors ${
+                  filters.roughDay === true
+                    ? "bg-accent/20 text-accent"
+                    : "bg-background border border-border text-muted hover:text-foreground"
+                }`}
+              >
+                Yes
+              </button>
+              <button
+                onClick={() =>
+                  onChange({
+                    ...filters,
+                    roughDay: filters.roughDay === false ? null : false,
+                  })
+                }
+                className={`px-3 py-1 rounded-full text-sm transition-colors ${
+                  filters.roughDay === false
+                    ? "bg-accent/20 text-accent"
+                    : "bg-background border border-border text-muted hover:text-foreground"
+                }`}
+              >
+                No
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
--- a/src/components/MoodSelector.tsx
+++ b/src/components/MoodSelector.tsx
@@ -0,0 +1,45 @@
+"use client";
+
+import { MOOD_LABELS } from "@/lib/constants";
+
+const MOOD_ICONS = ["😔", "😕", "😐", "🙂", "😊"];
+
+interface MoodSelectorProps {
+  value: number | null;
+  onChange: (mood: number | null) => void;
+}
+
+export function MoodSelector({ value, onChange }: MoodSelectorProps) {
+  return (
+    <div className="flex items-center gap-2">
+      {MOOD_ICONS.map((icon, index) => {
+        const moodValue = index + 1;
+        const isSelected = value === moodValue;
+        return (
+          <button
+            key={moodValue}
+            type="button"
+            onClick={() => onChange(isSelected ? null : moodValue)}
+            aria-label={MOOD_LABELS[moodValue]}
+            aria-pressed={isSelected}
+            className={`text-2xl p-2 rounded-lg transition-all ${
+              isSelected
+                ? "bg-accent/20 scale-110"
+                : "opacity-40 hover:opacity-70 hover:bg-surface"
+            }`}
+          >
+            {icon}
+          </button>
+        );
+      })}
+    </div>
+  );
+}
+
+export function MoodIcon({ mood }: { mood: number }) {
+  return (
+    <span aria-label={MOOD_LABELS[mood]} title={MOOD_LABELS[mood]}>
+      {MOOD_ICONS[mood - 1]}
+    </span>
+  );
+}
--- a/src/components/Navigation.tsx
+++ b/src/components/Navigation.tsx
@@ -0,0 +1,38 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { Home, List, Download, Settings } from "lucide-react";
+
+const NAV_ITEMS = [
+  { href: "/", icon: Home, label: "Check-in" },
+  { href: "/timeline", icon: List, label: "Timeline" },
+  { href: "/export", icon: Download, label: "Export" },
+  { href: "/settings", icon: Settings, label: "Settings" },
+];
+
+export function Navigation() {
+  const pathname = usePathname();
+
+  return (
+    <nav className="fixed bottom-0 left-0 right-0 bg-background border-t border-border safe-area-bottom">
+      <div className="flex justify-around max-w-lg mx-auto">
+        {NAV_ITEMS.map(({ href, icon: Icon, label }) => {
+          const isActive = pathname === href;
+          return (
+            <Link
+              key={href}
+              href={href}
+              className={`flex flex-col items-center gap-1 py-3 px-4 ${
+                isActive ? "text-accent" : "text-muted hover:text-foreground"
+              }`}
+            >
+              <Icon size={20} />
+              <span className="text-xs">{label}</span>
+            </Link>
+          );
+        })}
+      </div>
+    </nav>
+  );
+}
--- a/src/components/TagInput.tsx
+++ b/src/components/TagInput.tsx
@@ -0,0 +1,146 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { X, Plus } from "lucide-react";
+import type { Tag } from "@/lib/db/schema";
+
+interface TagInputProps {
+  selectedTags: string[];
+  onAddTag: (name: string) => void;
+  onRemoveTag: (name: string) => void;
+}
+
+export function TagInput({ selectedTags, onAddTag, onRemoveTag }: TagInputProps) {
+  const [recentTags, setRecentTags] = useState<Tag[]>([]);
+  const [inputValue, setInputValue] = useState("");
+  const [showInput, setShowInput] = useState(false);
+
+  useEffect(() => {
+    async function loadRecentTags() {
+      try {
+        const res = await fetch("/api/tags?limit=10");
+        if (res.ok) {
+          const tags = await res.json();
+          setRecentTags(tags);
+        }
+      } catch {
+        // Ignore
+      }
+    }
+    loadRecentTags();
+  }, []);
+
+  const availableTags = recentTags.filter((t) => !selectedTags.includes(t.name));
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    const trimmed = inputValue.trim();
+    if (trimmed) {
+      onAddTag(trimmed);
+      setInputValue("");
+      setShowInput(false);
+    }
+  };
+
+  return (
+    <div className="space-y-3">
+      {/* Selected tags */}
+      {selectedTags.length > 0 && (
+        <div className="flex flex-wrap gap-2">
+          {selectedTags.map((tag) => (
+            <span
+              key={tag}
+              className="inline-flex items-center gap-1 px-3 py-1 bg-accent/20 text-accent rounded-full text-sm"
+            >
+              {tag}
+              <button
+                type="button"
+                onClick={() => onRemoveTag(tag)}
+                className="hover:bg-accent/30 rounded-full p-0.5"
+                aria-label={`Remove ${tag}`}
+              >
+                <X size={14} />
+              </button>
+            </span>
+          ))}
+        </div>
+      )}
+
+      {/* Recent tags to tap */}
+      {availableTags.length > 0 && (
+        <div className="flex flex-wrap gap-2">
+          {availableTags.slice(0, 6).map((tag) => (
+            <button
+              key={tag.id}
+              type="button"
+              onClick={() => onAddTag(tag.name)}
+              className="px-3 py-1 bg-surface border border-border rounded-full text-sm text-muted hover:text-foreground hover:border-muted transition-colors"
+            >
+              + {tag.name}
+            </button>
+          ))}
+        </div>
+      )}
+
+      {/* Add custom tag */}
+      {showInput ? (
+        <form onSubmit={handleSubmit} className="flex gap-2">
+          <input
+            type="text"
+            value={inputValue}
+            onChange={(e) => setInputValue(e.target.value)}
+            placeholder="Type a tag..."
+            className="flex-1 px-3 py-2 bg-surface border border-border rounded-lg text-sm focus:outline-none focus:border-muted"
+            autoFocus
+            onBlur={() => {
+              if (!inputValue.trim()) setShowInput(false);
+            }}
+          />
+          <button
+            type="submit"
+            className="px-3 py-2 bg-accent text-white rounded-lg text-sm"
+          >
+            Add
+          </button>
+        </form>
+      ) : (
+        <button
+          type="button"
+          onClick={() => setShowInput(true)}
+          className="inline-flex items-center gap-1 px-3 py-1 text-sm text-muted hover:text-foreground transition-colors"
+        >
+          <Plus size={14} />
+          Add tag
+        </button>
+      )}
+    </div>
+  );
+}
+
+interface TagChipsProps {
+  tags: { id: string; name: string }[];
+  maxDisplay?: number;
+}
+
+export function TagChips({ tags, maxDisplay = 2 }: TagChipsProps) {
+  if (tags.length === 0) return null;
+
+  const displayed = tags.slice(0, maxDisplay);
+  const remaining = tags.length - maxDisplay;
+
+  return (
+    <div className="flex gap-1">
+      {displayed.map((tag) => (
+        <span
+          key={tag.id}
+          className="px-2 py-0.5 bg-surface text-muted text-xs rounded"
+        >
+          {tag.name}
+        </span>
+      ))}
+      {remaining > 0 && (
+        <span className="px-2 py-0.5 text-muted text-xs">+{remaining}</span>
+      )}
+    </div>
+  );
+}
--- a/src/components/Toast.tsx
+++ b/src/components/Toast.tsx
@@ -0,0 +1,41 @@
+"use client";
+
+import { X } from "lucide-react";
+import type { Toast as ToastType } from "@/hooks/useToast";
+
+interface ToastContainerProps {
+  toasts: ToastType[];
+  onDismiss: (id: string) => void;
+}
+
+export function ToastContainer({ toasts, onDismiss }: ToastContainerProps) {
+  if (toasts.length === 0) return null;
+
+  return (
+    <div className="fixed bottom-4 left-1/2 -translate-x-1/2 z-50 flex flex-col gap-2">
+      {toasts.map((toast) => (
+        <div
+          key={toast.id}
+          className="flex items-center gap-3 px-4 py-3 bg-surface border border-border rounded-lg shadow-lg animate-slide-up"
+        >
+          <span className="text-sm">{toast.message}</span>
+          {toast.action && (
+            <button
+              onClick={toast.action.onClick}
+              className="text-sm text-accent font-medium hover:underline"
+            >
+              {toast.action.label}
+            </button>
+          )}
+          <button
+            onClick={() => onDismiss(toast.id)}
+            className="text-muted hover:text-foreground p-1"
+            aria-label="Dismiss"
+          >
+            <X size={16} />
+          </button>
+        </div>
+      ))}
+    </div>
+  );
+}
--- a/src/components/WeeklyReflection.tsx
+++ b/src/components/WeeklyReflection.tsx
@@ -0,0 +1,65 @@
+"use client";
+
+import type { EntryWithTags } from "@/lib/types";
+import { isWithinWeek } from "@/lib/utils/date";
+
+interface WeeklyReflectionProps {
+  entries: EntryWithTags[];
+}
+
+export function WeeklyReflection({ entries }: WeeklyReflectionProps) {
+  // Filter to last 7 days
+  const weekEntries = entries.filter((e) => isWithinWeek(e.date));
+
+  if (weekEntries.length === 0) {
+    return null;
+  }
+
+  // Count tag occurrences
+  const tagCounts = new Map<string, { name: string; count: number }>();
+  for (const entry of weekEntries) {
+    for (const tag of entry.tags) {
+      const existing = tagCounts.get(tag.id);
+      if (existing) {
+        existing.count++;
+      } else {
+        tagCounts.set(tag.id, { name: tag.name, count: 1 });
+      }
+    }
+  }
+
+  // Get top 3 tags
+  const topTags = Array.from(tagCounts.values())
+    .sort((a, b) => b.count - a.count)
+    .slice(0, 3);
+
+  // Generate summary
+  let summary = "";
+  if (topTags.length > 0) {
+    const tagNames = topTags.map((t) => capitalize(t.name));
+    if (tagNames.length === 1) {
+      summary = `You mentioned: ${tagNames[0]}.`;
+    } else if (tagNames.length === 2) {
+      summary = `You mentioned: ${tagNames[0]} and ${tagNames[1]}.`;
+    } else {
+      summary = `You mentioned: ${tagNames.slice(0, -1).join(", ")}, and ${tagNames[tagNames.length - 1]}.`;
+    }
+  }
+
+  return (
+    <div className="bg-surface border border-border rounded-xl p-4 mb-6">
+      <h2 className="text-sm font-medium text-muted mb-2">This week</h2>
+      <div className="flex items-baseline gap-4 mb-2">
+        <span className="text-2xl font-light">{weekEntries.length}</span>
+        <span className="text-sm text-muted">
+          {weekEntries.length === 1 ? "entry" : "entries"}
+        </span>
+      </div>
+      {summary && <p className="text-sm text-muted italic">{summary}</p>}
+    </div>
+  );
+}
+
+function capitalize(str: string): string {
+  return str.charAt(0).toUpperCase() + str.slice(1);
+}
--- a/src/hooks/useDebounce.ts
+++ b/src/hooks/useDebounce.ts
@@ -0,0 +1,32 @@
+"use client";
+
+import { useEffect, useRef, useCallback } from "react";
+
+export function useDebounce<T extends (...args: Parameters<T>) => void>(
+  callback: T,
+  delay: number
+): T {
+  const timeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  const debouncedFn = useCallback(
+    (...args: Parameters<T>) => {
+      if (timeoutRef.current) {
+        clearTimeout(timeoutRef.current);
+      }
+      timeoutRef.current = setTimeout(() => {
+        callback(...args);
+      }, delay);
+    },
+    [callback, delay]
+  ) as T;
+
+  useEffect(() => {
+    return () => {
+      if (timeoutRef.current) {
+        clearTimeout(timeoutRef.current);
+      }
+    };
+  }, []);
+
+  return debouncedFn;
+}
--- a/src/hooks/useEntry.ts
+++ b/src/hooks/useEntry.ts
@@ -0,0 +1,191 @@
+"use client";
+
+import { useState, useEffect, useCallback, useRef } from "react";
+import { useDebounce } from "./useDebounce";
+import type { EntryWithTags, CreateEntryRequest } from "@/lib/types";
+import { getLocalDate } from "@/lib/utils/date";
+import { AUTOSAVE_DELAY } from "@/lib/constants";
+
+interface UseEntryOptions {
+  date?: string;
+  entryId?: string;
+}
+
+export function useEntry({ date, entryId }: UseEntryOptions = {}) {
+  const targetDate = date || getLocalDate();
+  const [entry, setEntry] = useState<EntryWithTags | null>(null);
+  const [text, setText] = useState("");
+  const [mood, setMood] = useState<number | null>(null);
+  const [roughDay, setRoughDay] = useState(false);
+  const [tagNames, setTagNames] = useState<string[]>([]);
+  const [isSaving, setIsSaving] = useState(false);
+  const [isLoading, setIsLoading] = useState(true);
+  const [lastSaved, setLastSaved] = useState<Date | null>(null);
+  const pendingSaveRef = useRef(false);
+
+  // Load entry
+  useEffect(() => {
+    async function loadEntry() {
+      setIsLoading(true);
+      try {
+        let data: EntryWithTags | null = null;
+
+        if (entryId) {
+          const res = await fetch(`/api/entries/${entryId}`);
+          if (res.ok) {
+            data = await res.json();
+          }
+        } else {
+          // Load today's entry by date
+          const res = await fetch(`/api/entries?since=${targetDate}`);
+          if (res.ok) {
+            const entries: EntryWithTags[] = await res.json();
+            data = entries.find((e) => e.date === targetDate) || null;
+          }
+        }
+
+        if (data) {
+          setEntry(data);
+          setText(data.text);
+          setMood(data.mood);
+          setRoughDay(Boolean(data.roughDay));
+          setTagNames(data.tags.map((t) => t.name));
+        }
+      } catch (error) {
+        console.error("Failed to load entry:", error);
+      } finally {
+        setIsLoading(false);
+      }
+    }
+
+    loadEntry();
+  }, [targetDate, entryId]);
+
+  // Save function
+  const save = useCallback(async () => {
+    if (!text.trim()) return;
+
+    setIsSaving(true);
+    pendingSaveRef.current = false;
+
+    try {
+      const body: CreateEntryRequest = {
+        date: entry?.date || targetDate,
+        text: text.trim(),
+        mood,
+        roughDay,
+        tagNames,
+      };
+
+      const res = await fetch("/api/entries", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(body),
+      });
+
+      if (res.ok) {
+        const saved: EntryWithTags = await res.json();
+        setEntry(saved);
+        setLastSaved(new Date());
+      }
+    } catch (error) {
+      console.error("Failed to save entry:", error);
+    } finally {
+      setIsSaving(false);
+    }
+  }, [text, mood, roughDay, tagNames, entry?.date, targetDate]);
+
+  // Debounced save
+  const debouncedSave = useDebounce(() => {
+    if (pendingSaveRef.current) {
+      save();
+    }
+  }, AUTOSAVE_DELAY);
+
+  // Mark pending and trigger debounced save
+  const markDirty = useCallback(() => {
+    pendingSaveRef.current = true;
+    debouncedSave();
+  }, [debouncedSave]);
+
+  // Update handlers that trigger autosave
+  const updateText = useCallback(
+    (value: string) => {
+      setText(value);
+      markDirty();
+    },
+    [markDirty]
+  );
+
+  const updateMood = useCallback(
+    (value: number | null) => {
+      setMood(value);
+      markDirty();
+    },
+    [markDirty]
+  );
+
+  const updateRoughDay = useCallback(
+    (value: boolean) => {
+      setRoughDay(value);
+      markDirty();
+    },
+    [markDirty]
+  );
+
+  const addTag = useCallback(
+    (name: string) => {
+      const normalized = name.toLowerCase().trim();
+      if (normalized && !tagNames.includes(normalized)) {
+        setTagNames((prev) => [...prev, normalized]);
+        markDirty();
+      }
+    },
+    [tagNames, markDirty]
+  );
+
+  const removeTag = useCallback(
+    (name: string) => {
+      setTagNames((prev) => prev.filter((t) => t !== name));
+      markDirty();
+    },
+    [markDirty]
+  );
+
+  // Save on unmount if pending
+  useEffect(() => {
+    return () => {
+      if (pendingSaveRef.current && text.trim()) {
+        // Fire and forget
+        fetch("/api/entries", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({
+            date: entry?.date || targetDate,
+            text: text.trim(),
+            mood,
+            roughDay,
+            tagNames,
+          }),
+        }).catch(() => {});
+      }
+    };
+  }, [text, mood, roughDay, tagNames, entry?.date, targetDate]);
+
+  return {
+    entry,
+    text,
+    mood,
+    roughDay,
+    tagNames,
+    isLoading,
+    isSaving,
+    lastSaved,
+    updateText,
+    updateMood,
+    updateRoughDay,
+    addTag,
+    removeTag,
+    save,
+  };
+}
--- a/src/hooks/useToast.ts
+++ b/src/hooks/useToast.ts
@@ -0,0 +1,38 @@
+"use client";
+
+import { useState, useCallback } from "react";
+
+export interface Toast {
+  id: string;
+  message: string;
+  action?: {
+    label: string;
+    onClick: () => void;
+  };
+}
+
+export function useToast() {
+  const [toasts, setToasts] = useState<Toast[]>([]);
+
+  const showToast = useCallback(
+    (message: string, action?: Toast["action"], duration = 5000) => {
+      const id = Math.random().toString(36).slice(2);
+      const toast: Toast = { id, message, action };
+
+      setToasts((prev) => [...prev, toast]);
+
+      setTimeout(() => {
+        setToasts((prev) => prev.filter((t) => t.id !== id));
+      }, duration);
+
+      return id;
+    },
+    []
+  );
+
+  const dismissToast = useCallback((id: string) => {
+    setToasts((prev) => prev.filter((t) => t.id !== id));
+  }, []);
+
+  return { toasts, showToast, dismissToast };
+}
--- a/src/lib/constants.ts
+++ b/src/lib/constants.ts
@@ -0,0 +1,14 @@
+// App name - change this to customize your instance
+export const APP_NAME = "Quiet Thanks";
+
+// Mood labels for accessibility
+export const MOOD_LABELS: Record<number, string> = {
+  1: "Very low",
+  2: "Low",
+  3: "Neutral",
+  4: "Good",
+  5: "Very good",
+};
+
+// Autosave debounce delay in ms
+export const AUTOSAVE_DELAY = 800;
--- a/src/lib/db/index.ts
+++ b/src/lib/db/index.ts
@@ -0,0 +1,14 @@
+import Database from "better-sqlite3";
+import { drizzle } from "drizzle-orm/better-sqlite3";
+import * as schema from "./schema";
+import path from "path";
+
+const dbPath = process.env.DATABASE_PATH || path.join(process.cwd(), "data", "quietthanks.db");
+
+const sqlite = new Database(dbPath);
+sqlite.pragma("journal_mode = WAL");
+sqlite.pragma("busy_timeout = 5000");
+sqlite.pragma("foreign_keys = ON");
+
+export const db = drizzle(sqlite, { schema });
+export { schema };
--- a/src/lib/db/migrate.ts
+++ b/src/lib/db/migrate.ts
@@ -0,0 +1,27 @@
+import Database from "better-sqlite3";
+import { drizzle } from "drizzle-orm/better-sqlite3";
+import { migrate } from "drizzle-orm/better-sqlite3/migrator";
+import path from "path";
+import fs from "fs";
+
+const dbPath = process.env.DATABASE_PATH || path.join(process.cwd(), "data", "quietthanks.db");
+
+// Ensure data directory exists
+const dataDir = path.dirname(dbPath);
+if (!fs.existsSync(dataDir)) {
+  fs.mkdirSync(dataDir, { recursive: true });
+}
+
+const sqlite = new Database(dbPath);
+sqlite.pragma("journal_mode = WAL");
+sqlite.pragma("busy_timeout = 5000");
+sqlite.pragma("foreign_keys = ON");
+const db = drizzle(sqlite);
+
+console.log("Running migrations...");
+migrate(db, { migrationsFolder: "./drizzle" });
+console.log("Migrations complete!");
+
+// Checkpoint WAL to ensure clean state for build
+sqlite.pragma("wal_checkpoint(TRUNCATE)");
+sqlite.close();
--- a/src/lib/db/schema.ts
+++ b/src/lib/db/schema.ts
@@ -0,0 +1,40 @@
+import { sqliteTable, text, integer, primaryKey } from "drizzle-orm/sqlite-core";
+
+export const entries = sqliteTable("entries", {
+  id: text("id").primaryKey(),
+  date: text("date").notNull(), // YYYY-MM-DD local date
+  text: text("text").notNull(),
+  mood: integer("mood"), // 1-5, null if not set
+  roughDay: integer("rough_day").notNull().default(0),
+  createdAt: integer("created_at").notNull(), // Unix ms
+  updatedAt: integer("updated_at").notNull(), // Unix ms
+});
+
+export const tags = sqliteTable("tags", {
+  id: text("id").primaryKey(),
+  name: text("name").notNull().unique(), // Normalized lowercase
+  createdAt: integer("created_at").notNull(), // Unix ms
+});
+
+export const entryTags = sqliteTable(
+  "entry_tags",
+  {
+    entryId: text("entry_id")
+      .notNull()
+      .references(() => entries.id, { onDelete: "cascade" }),
+    tagId: text("tag_id")
+      .notNull()
+      .references(() => tags.id, { onDelete: "cascade" }),
+  },
+  (table) => [primaryKey({ columns: [table.entryId, table.tagId] })]
+);
+
+// Types
+export type Entry = typeof entries.$inferSelect;
+export type NewEntry = typeof entries.$inferInsert;
+
+export type Tag = typeof tags.$inferSelect;
+export type NewTag = typeof tags.$inferInsert;
+
+export type EntryTag = typeof entryTags.$inferSelect;
+export type NewEntryTag = typeof entryTags.$inferInsert;
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -0,0 +1,39 @@
+import type { Entry, Tag } from "./db/schema";
+
+// Entry with tags for API responses
+export interface EntryWithTags extends Entry {
+  tags: Tag[];
+}
+
+// API request/response types
+export interface CreateEntryRequest {
+  date: string;
+  text: string;
+  mood?: number | null;
+  roughDay?: boolean;
+  tagNames?: string[];
+}
+
+export interface UpdateEntryRequest {
+  text?: string;
+  mood?: number | null;
+  roughDay?: boolean;
+  tagNames?: string[];
+}
+
+// Filter state
+export interface FilterState {
+  moods: number[];
+  tagId: string | null;
+  roughDay: boolean | null;
+}
+
+// Weekly reflection data
+export interface WeeklyReflection {
+  entryCount: number;
+  topTags: Tag[];
+  summary: string;
+}
+
+// Export format
+export type ExportFormat = "markdown" | "json";
--- a/src/lib/utils/date.ts
+++ b/src/lib/utils/date.ts
@@ -0,0 +1,50 @@
+// Get today's date in YYYY-MM-DD format (local time)
+export function getLocalDate(): string {
+  const now = new Date();
+  const year = now.getFullYear();
+  const month = String(now.getMonth() + 1).padStart(2, "0");
+  const day = String(now.getDate()).padStart(2, "0");
+  return `${year}-${month}-${day}`;
+}
+
+// Format date for display
+export function formatDate(dateStr: string): string {
+  const date = new Date(dateStr + "T00:00:00");
+  return date.toLocaleDateString("en-US", {
+    weekday: "short",
+    month: "short",
+    day: "numeric",
+  });
+}
+
+// Format date with year
+export function formatDateLong(dateStr: string): string {
+  const date = new Date(dateStr + "T00:00:00");
+  return date.toLocaleDateString("en-US", {
+    weekday: "long",
+    year: "numeric",
+    month: "long",
+    day: "numeric",
+  });
+}
+
+// Get date N days ago
+export function getDateDaysAgo(days: number): string {
+  const date = new Date();
+  date.setDate(date.getDate() - days);
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, "0");
+  const day = String(date.getDate()).padStart(2, "0");
+  return `${year}-${month}-${day}`;
+}
+
+// Check if date is today
+export function isToday(dateStr: string): boolean {
+  return dateStr === getLocalDate();
+}
+
+// Check if date is within last 7 days
+export function isWithinWeek(dateStr: string): boolean {
+  const weekAgo = getDateDaysAgo(7);
+  return dateStr >= weekAgo;
+}
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,34 @@
+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts",
+    "**/*.mts"
+  ],
+  "exclude": ["node_modules"]
+}