Add FastAPI backend with agent system

backend/pyproject.toml

@@ -0,0 +1,77 @@
+[project]
+name = "jarvis-backend"
+version = "0.1.0"
+description = "Jarvis Personal AI Assistant - Backend"
+readme = "README.md"
+requires-python = ">=3.12"
+license = { text = "MIT" }
+
+dependencies = [
+    # Web 框架
+    "fastapi>=0.115.0",
+    "uvicorn[standard]>=0.30.0",
+    "python-multipart>=0.0.12",
+    "websockets>=12.0",
+    "aiofiles>=24.0.0",
+
+    # Agent 框架
+    "langgraph>=0.2.36",
+    "langchain-anthropic>=0.3.14",
+    "langchain-openai>=0.3.18",
+    "langchain-core>=0.3.52",
+    "langchain-ollama>=0.4.0",
+    "langsmith>=0.1.0",
+
+    # 知识库框架
+    "llama-index>=0.12.0",
+    "llama-index-vector-stores-chroma>=0.3.0",
+    "chromadb>=0.5.0",
+
+    # 数据库
+    "sqlalchemy>=2.0.0",
+    "aiosqlite>=0.20.0",
+    "alembic>=1.13.0",
+
+    # 认证 & 安全
+    "python-jose[cryptography]>=3.3.0",
+    "passlib[bcrypt]>=1.7.4",
+    "bcrypt>=4.0.0,<5.0.0",
+
+    # 配置 & 验证
+    "pydantic>=2.0.0",
+    "pydantic-settings>=2.0.0",
+    "email-validator>=2.0.0",
+
+    # 定时任务
+    "APScheduler>=3.10.0",
+
+    # 工具
+    "python-dotenv>=1.0.0",
+    "httpx>=0.27.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "pytest-asyncio>=0.23.0",
+    "pytest-cov>=4.1.0",
+    "ruff>=0.5.0",
+    "mypy>=1.10.0",
+    "pre-commit>=3.7.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["app"]
+
+[tool.ruff]
+target-version = "py312"
+line-length = 100
+select = ["E", "F", "I", "N", "W", "UP"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]