Initial commit: Pixel AI comic/video creation platform

- FastAPI backend with SQLModel, Alembic migrations, AgentScope agents
- Next.js 15 frontend with React 19, Tailwind, Zustand, React Flow
- Multi-provider AI system (DashScope, Kling, MiniMax, Volcengine, OpenAI, etc.)
- All HTTP clients migrated from sync requests to async httpx
- Admin-managed API keys via environment variables
- SSRF vulnerability fixed in ensure_url()

docker-compose.yml

@@ -0,0 +1,58 @@
+services:
+  backend:
+    build: 
+      context: ./backend
+      dockerfile: Dockerfile
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./backend/src:/app/src
+      - ./backend/data:/app/data
+      - ./backend/uploads:/app/uploads
+      # Mount .env if needed, or rely on COPY in Dockerfile. 
+      # Mounting is better for dev/secrets, but COPY is better for self-contained.
+      # We'll stick to the COPY in Dockerfile for now, but allow override via env_file.
+    env_file:
+      - ./backend/.env
+    environment:
+      - REDIS_URL=redis://redis:6379
+      - DATABASE_URL=postgresql://pixel:pixelpassword@postgres:5432/pixeldb
+    depends_on:
+      - redis
+      - postgres
+    restart: always
+
+  redis:
+    image: redis:6-alpine
+    ports:
+      - "63791:6379"
+    restart: always
+
+  postgres:
+    image: postgres:15-alpine
+    environment:
+      POSTGRES_USER: pixel
+      POSTGRES_PASSWORD: pixelpassword
+      POSTGRES_DB: pixeldb
+    ports:
+      - "54321:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    restart: always
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+      args:
+        - API_URL=http://backend:8000
+    ports:
+      - "3000:3000"
+    environment:
+      - API_URL=http://backend:8000
+    depends_on:
+      - backend
+    restart: always
+
+volumes:
+  postgres_data: