Add FastAPI backend with agent system

backend/app/routers/settings.py

@@ -0,0 +1,87 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from app.database import get_db
+from app.models.user import User
+from app.routers.auth import get_current_user
+from app.schemas.settings import (
+    SettingsOut, ProfileUpdateIn, LLMConfigIn, SchedulerConfigIn, LLMTestIn
+)
+from app.services.settings_service import (
+    get_user_settings, update_user_profile, update_llm_config,
+    update_scheduler_config, test_llm_connection
+)
+
+router = APIRouter(prefix="/api/settings", tags=["设置"])
+
+
+@router.get("", response_model=SettingsOut)
+async def get_settings(
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    settings = await get_user_settings(current_user.id, db)
+    if not settings:
+        raise HTTPException(status_code=404, detail="用户不存在")
+    return settings
+
+
+@router.put("/profile")
+async def update_profile(
+    data: ProfileUpdateIn,
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    try:
+        user = await update_user_profile(
+            current_user.id, db,
+            full_name=data.full_name,
+            password=data.password,
+            current_password=data.current_password
+        )
+        return user
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+
+
+@router.put("/llm")
+async def update_llm(
+    data: LLMConfigIn,
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    try:
+        config = await update_llm_config(current_user.id, data.model_dump(exclude_none=True), db)
+        return {"llm_config": config}
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+
+
+@router.post("/llm/test")
+async def test_llm(
+    data: LLMTestIn,
+    current_user: User = Depends(get_current_user),
+):
+    result = await test_llm_connection(
+        provider=data.provider,
+        model=data.model,
+        base_url=data.base_url,
+        api_key=data.api_key
+    )
+    return result
+
+
+@router.put("/scheduler")
+async def update_scheduler(
+    data: SchedulerConfigIn,
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    try:
+        config = await update_scheduler_config(
+            current_user.id,
+            data.model_dump(exclude_none=True),
+            db
+        )
+        return {"scheduler_config": config}
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))