Initial commit: 浼佷笟寰俊 AI 鏈哄櫒浜哄姪鐞?MVP

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/routers/sessions.py

@@ -0,0 +1,53 @@
+"""会话列表与消息：从 DB 读取，需登录。"""
+from fastapi import APIRouter, Depends
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.deps import get_current_user_id
+from app.logging_config import get_trace_id
+from app.models import ChatSession, Message
+
+router = APIRouter()
+
+
+def _session_row(s: ChatSession) -> dict:
+    return {
+        "id": s.id,
+        "external_user_id": s.external_user_id,
+        "external_name": s.external_name,
+        "status": s.status,
+        "created_at": s.created_at.isoformat() if s.created_at else None,
+    }
+
+
+def _message_row(m: Message) -> dict:
+    return {
+        "id": m.id,
+        "role": m.role,
+        "content": m.content,
+        "created_at": m.created_at.isoformat() if m.created_at else None,
+    }
+
+
+@router.get("")
+async def list_sessions(
+    db: AsyncSession = Depends(get_db),
+    _user: str = Depends(get_current_user_id),
+):
+    """会话列表。"""
+    r = await db.execute(select(ChatSession).order_by(ChatSession.updated_at.desc()))
+    rows = r.scalars().all()
+    return {"code": 0, "message": "ok", "data": [_session_row(s) for s in rows], "trace_id": get_trace_id()}
+
+
+@router.get("/{session_id}/messages")
+async def list_messages(
+    session_id: int,
+    db: AsyncSession = Depends(get_db),
+    _user: str = Depends(get_current_user_id),
+):
+    """某会话消息列表。"""
+    r = await db.execute(select(Message).where(Message.session_id == session_id).order_by(Message.id))
+    rows = r.scalars().all()
+    return {"code": 0, "message": "ok", "data": [_message_row(m) for m in rows], "trace_id": get_trace_id()}