chore: init monorepo snapshot

wolai-backend/app/routers/__init__.py

@@ -0,0 +1,10 @@
+from fastapi import APIRouter
+
+from . import chat, health, tasks
+
+api_router = APIRouter(prefix="/api/v1")
+api_router.include_router(tasks.router, tags=["tasks"])
+api_router.include_router(chat.router, tags=["chat"])
+
+root_router = APIRouter()
+root_router.include_router(health.router, tags=["health"])

wolai-backend/app/routers/chat.py

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+import asyncio
+from fastapi import APIRouter
+from fastapi.responses import StreamingResponse
+
+from app.deps import AuthDep
+from app.services.lightrag_service import lightrag_service
+
+router = APIRouter(prefix="/chat")
+
+
+@router.get("")
+async def chat(query: str, document_id: str, auth: AuthDep) -> StreamingResponse:  # noqa: ARG001
+    """
+    SSE 流式占位。后续会调用 LightRAG + OpenAI。
+    当前直接返回 mock 文字，确保前端链路可用。
+    """
+
+    async def event_stream() -> asyncio.AsyncGenerator[str, None]:
+        reply = await lightrag_service.query(query_text=query, user_id="placeholder-user")
+        chunks = [reply[: len(reply) // 2 or 1], reply[len(reply) // 2 or 1 :]]
+        for chunk in chunks:
+            yield f"data: {chunk}\n\n"
+            await asyncio.sleep(0.1)
+        yield "data: [DONE]\n\n"
+
+    return StreamingResponse(event_stream(), media_type="text/event-stream")

wolai-backend/app/routers/health.py

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+from typing import Dict
+
+from fastapi import APIRouter
+
+router = APIRouter()
+
+
+@router.get("/health")
+async def healthcheck() -> Dict[str, str]:
+    """简单健康检查，供阶段 0 自检使用。"""
+    return {"status": "ok"}

wolai-backend/app/routers/tasks.py

@@ -0,0 +1,29 @@
+from fastapi import APIRouter, HTTPException, status
+
+from app.deps import AuthDep
+from app.schemas.tasks import OcrTaskRequest, TaskStatusResponse
+from app.services.task_tracker import task_tracker
+from app.workers.tasks import ocr_pipeline
+
+router = APIRouter(prefix="/tasks")
+
+
+@router.post("/ocr", response_model=TaskStatusResponse)
+async def enqueue_ocr_task(payload: OcrTaskRequest, auth: AuthDep) -> TaskStatusResponse:
+    """记录任务并投递 Celery，阶段 0 返回占位任务。"""
+    task = task_tracker.create_task(user_id=auth.user_id, document_id=payload.document_id, task_type="ocr")
+    ocr_pipeline.delay(
+        task_id=task.task_id,
+        document_id=payload.document_id,
+        file_url=str(payload.file_url),
+        user_id=auth.user_id,
+    )
+    return task
+
+
+@router.get("/{task_id}", response_model=TaskStatusResponse)
+async def get_task_status(task_id: str, auth: AuthDep) -> TaskStatusResponse:
+    task = task_tracker.get_task(task_id=task_id, user_id=auth.user_id)
+    if not task:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Task not found")
+    return task