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()

backend/pyproject.toml

@@ -0,0 +1,49 @@
+[project]
+name = "backend"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "alibabacloud-tea-openapi>=0.4.2",
+    "alibabacloud-tea-util>=0.3.14",
+    "alibabacloud-videoenhan20200320>=4.0.0",
+    "fastapi>=0.127.0",
+    "oss2>=2.19.1",
+    "pydantic>=2.12.5",
+    "python-dotenv>=1.2.1",
+    "python-multipart>=0.0.21",
+    "requests>=2.32.5",
+    "httpx>=0.27.0",
+    "uvicorn>=0.40.0",
+    "modelscope>=1.29.2",
+    "volcengine>=1.0.100",
+    "google-generativeai>=0.8.4",
+    "sqlmodel>=0.0.31",
+    "alembic>=1.17.2",
+    "agentscope>=1.0.11",
+    "redis>=5.0.0",
+    "prometheus-client>=0.20.0",
+    "opentelemetry-api>=1.25.0",
+    "opentelemetry-sdk>=1.25.0",
+    "opentelemetry-instrumentation-fastapi>=0.46b0",
+    "opentelemetry-exporter-otlp-proto-grpc>=1.25.0",
+    "fastmcp>=2.0.0",
+    "tenacity>=8.2.3",
+    "psycopg2-binary>=2.9.9",
+    "asyncpg>=0.29.0",
+    "sqladmin[full]>=0.16.0",
+    "itsdangerous>=2.1.2",
+    "psutil>=5.9.0",
+    "Pillow>=11.0.0",
+]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "function"
+pythonpath = ["."]
+
+[dependency-groups]
+dev = [
+    "hypothesis>=6.151.5",
+]