init

backend/app/api/routes/__init__.py

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+from fastapi import APIRouter
+
+from app.api.routes import chat, health, pomodoro
+
+api_router = APIRouter(prefix="/api/v1")
+api_router.include_router(health.router, tags=["health"])
+api_router.include_router(chat.router, prefix="/chat", tags=["chat"])
+api_router.include_router(pomodoro.router, prefix="/pomodoro", tags=["pomodoro"])

backend/app/api/routes/chat.py

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+from fastapi import APIRouter, Depends, HTTPException
+from fastapi.responses import StreamingResponse
+from sqlalchemy.orm import Session
+
+from app.api.schemas import MessageCreate, MessageOut, SessionCreate, SessionDetailOut, SessionOut
+from app.chat.service import ChatService
+from app.db.base import get_db
+
+router = APIRouter()
+
+
+@router.post("/sessions", response_model=SessionOut)
+def create_session(payload: SessionCreate, db: Session = Depends(get_db)) -> SessionOut:
+    service = ChatService(db)
+    return service.create_session(title=payload.title)
+
+
+@router.get("/sessions", response_model=list[SessionOut])
+def list_sessions(db: Session = Depends(get_db)) -> list[SessionOut]:
+    service = ChatService(db)
+    return service.list_sessions()
+
+
+@router.get("/sessions/{session_id}", response_model=SessionDetailOut)
+def get_session(session_id: int, db: Session = Depends(get_db)) -> SessionDetailOut:
+    service = ChatService(db)
+    session = service.get_session(session_id)
+    if not session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    return session
+
+
+@router.delete("/sessions/{session_id}")
+def delete_session(session_id: int, db: Session = Depends(get_db)) -> dict[str, bool]:
+    service = ChatService(db)
+    if not service.delete_session(session_id):
+        raise HTTPException(status_code=404, detail="Session not found")
+    return {"ok": True}
+
+
+@router.post("/sessions/{session_id}/messages")
+async def send_message(
+    session_id: int,
+    payload: MessageCreate,
+    db: Session = Depends(get_db),
+) -> StreamingResponse:
+    service = ChatService(db)
+    if not service.get_session(session_id):
+        raise HTTPException(status_code=404, detail="Session not found")
+
+    async def event_stream():
+        async for chunk in service.stream_response(session_id, payload.content):
+            yield chunk
+
+    return StreamingResponse(event_stream(), media_type="text/event-stream")

backend/app/api/routes/health.py

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+from fastapi import APIRouter
+
+router = APIRouter()
+
+
+@router.get("/health")
+def health() -> dict[str, str]:
+    return {"status": "ok"}

backend/app/api/routes/pomodoro.py

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+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.api.schemas import PomodoroStart, PomodoroStop
+from app.db.base import get_db
+from app.pomodoro.service import PomodoroService
+
+router = APIRouter()
+
+
+def _handle_value_error(exc: ValueError) -> HTTPException:
+    return HTTPException(status_code=400, detail=str(exc))
+
+
+@router.get("/status")
+def get_status(db: Session = Depends(get_db)) -> dict:
+    return PomodoroService(db).get_status()
+
+
+@router.post("/start")
+def start_pomodoro(payload: PomodoroStart, db: Session = Depends(get_db)) -> dict:
+    try:
+        return PomodoroService(db).start(
+            duration_min=payload.duration_min,
+            task_note=payload.task_note,
+        )
+    except ValueError as exc:
+        raise _handle_value_error(exc) from exc
+
+
+@router.post("/pause")
+def pause_pomodoro(db: Session = Depends(get_db)) -> dict:
+    try:
+        return PomodoroService(db).pause()
+    except ValueError as exc:
+        raise _handle_value_error(exc) from exc
+
+
+@router.post("/resume")
+def resume_pomodoro(db: Session = Depends(get_db)) -> dict:
+    try:
+        return PomodoroService(db).resume()
+    except ValueError as exc:
+        raise _handle_value_error(exc) from exc
+
+
+@router.post("/stop")
+def stop_pomodoro(payload: PomodoroStop, db: Session = Depends(get_db)) -> dict:
+    try:
+        return PomodoroService(db).stop(
+            result=payload.result,
+            completed=payload.completed,
+        )
+    except ValueError as exc:
+        raise _handle_value_error(exc) from exc
+
+
+@router.get("/history")
+def get_history(limit: int = 20, db: Session = Depends(get_db)) -> list[dict]:
+    return PomodoroService(db).history(limit=limit)