Initial scaffold: FastAPI backend + React frontend + Docker Compose

- Backend: FastAPI with SQLite, clip CRUD, health check
- Frontend: React + Vite + TypeScript + Tailwind, dark theme
- Components: Generator, Gallery, Player
- Docker: Compose setup for backend + frontend
- Architecture docs in Palace KB

docker-compose.yml

@@ -0,0 +1,24 @@
+version: '3.8'
+
+services:
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./data:/app/data
+    environment:
+      - LYRIA_API_KEY=${LYRIA_API_KEY}
+    restart: unless-stopped
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    ports:
+      - "3000:3000"
+    depends_on:
+      - backend
+    restart: unless-stopped