修复数据采集和清理的bug，新增持仓排名功能，日线数据分页

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ft-app/app/routers/admin.py

@@ -2,8 +2,8 @@ from fastapi import APIRouter, Depends, Form, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
 from sqlalchemy.orm import Session
 from app.database import get_db
-from app.models import Product, Contract, DailyBar, PositionSnapshot
-from app.collector import sync_active_contracts, sync_one_contract
+from app.models import Product, Contract, DailyBar, PositionRanking
+from app.collector import sync_active_contracts, sync_one_contract, sync_position_rankings
 
 router = APIRouter(prefix="/admin", tags=["admin"])
 
@@ -113,7 +113,7 @@ def delete_contract(contract_id: int, db: Session = Depends(get_db)):
     c = db.query(Contract).filter(Contract.id == contract_id).first()
     if c:
         db.query(DailyBar).filter(DailyBar.contract == c.code).delete()
-        db.query(PositionSnapshot).filter(PositionSnapshot.contract_code == c.code).delete()
+        db.query(PositionRanking).filter(PositionRanking.contract_code == c.code).delete()
         db.delete(c)
         db.commit()
     return RedirectResponse("/admin/?tab=contract", status_code=303)
@@ -125,6 +125,7 @@ def delete_product(product_id: int, db: Session = Depends(get_db)):
     if p:
         for c in p.contracts:
             db.query(DailyBar).filter(DailyBar.contract == c.code).delete()
+            db.query(PositionRanking).filter(PositionRanking.contract_code == c.code).delete()
         db.delete(p)
         db.commit()
     return RedirectResponse("/admin/?tab=product", status_code=303)
@@ -144,6 +145,14 @@ def sync_single(contract_code: str):
     return RedirectResponse(f"/admin/?tab=sync&synced={count}", status_code=303)
 
 
+@router.post("/sync-positions")
+def sync_positions(request: Request):
+    results = sync_position_rankings()
+    total = sum(results.values())
+    print(f"[sync] Position rankings: {total} rows across {len(results)} contracts")
+    return RedirectResponse(f"/admin/?tab=sync&pos_synced={total}", status_code=303)
+
+
 @router.post("/sync/product/{product_id}")
 def sync_product(product_id: int, request: Request, db: Session = Depends(get_db)):
     contracts = db.query(Contract).filter(