Fix image handling to support category, room_id, and location_target fields

src/lib/schema.ts

@@ -22,6 +22,7 @@ export async function initSchema() {
       data TEXT NOT NULL,
       category VARCHAR(100) DEFAULT 'other',
       room_id INTEGER REFERENCES rooms(id) ON DELETE SET NULL,
+      location_target VARCHAR(100) DEFAULT 'gallery',
       uploaded_at TIMESTAMP DEFAULT NOW()
     );
   `);