feat: room booking system with 4 action buttons

- Display amenity icons on room cards
- Reserve button: date picker, availability check, booking
- Message button: contact admins via platform
- Calendar button: view room availability
- Comment button: submit reviews for admin approval
- Admin comment queue for approve/reject/edit
- Reservations, availability, and messages tables

src/lib/schema.ts

@@ -308,6 +308,49 @@ export async function initSchema() {
       PRIMARY KEY (room_id, amenity_id)
     );
   `);
+
+  await db.query(`
+    CREATE TABLE IF NOT EXISTS reservations (
+      id SERIAL PRIMARY KEY,
+      room_id INTEGER NOT NULL REFERENCES rooms(id),
+      user_id INTEGER NOT NULL REFERENCES users(id),
+      check_in DATE NOT NULL,
+      check_out DATE NOT NULL,
+      status VARCHAR(20) NOT NULL DEFAULT 'pending',
+      total_price DECIMAL(10,2),
+      created_at TIMESTAMP DEFAULT NOW(),
+      updated_at TIMESTAMP DEFAULT NOW()
+    );
+  `);
+
+  await db.query(`
+    CREATE TABLE IF NOT EXISTS room_availability (
+      id SERIAL PRIMARY KEY,
+      room_id INTEGER NOT NULL REFERENCES rooms(id),
+      date DATE NOT NULL,
+      status VARCHAR(20) NOT NULL DEFAULT 'available',
+      reason TEXT,
+      created_at TIMESTAMP DEFAULT NOW(),
+      UNIQUE(room_id, date)
+    );
+  `);
+
+  await db.query(`
+    CREATE TABLE IF NOT EXISTS messages (
+      id SERIAL PRIMARY KEY,
+      room_id INTEGER REFERENCES rooms(id),
+      user_id INTEGER NOT NULL REFERENCES users(id),
+      message TEXT NOT NULL,
+      read_by_admins BOOLEAN DEFAULT FALSE,
+      created_at TIMESTAMP DEFAULT NOW()
+    );
+  `);
+
+  await db.query(`ALTER TABLE room_comments ADD COLUMN IF NOT EXISTS status VARCHAR(20) DEFAULT 'approved'`);
+
+  await db.query(`CREATE INDEX IF NOT EXISTS idx_reservations_room_dates ON reservations(room_id, check_in, check_out)`);
+  await db.query(`CREATE INDEX IF NOT EXISTS idx_room_availability_room_date ON room_availability(room_id, date)`);
+  await db.query(`CREATE INDEX IF NOT EXISTS idx_messages_created_at ON messages(created_at DESC)`);
 }
 
 export async function migrateFromLegacyPlaces() {