feat: AI余额定时自动同步（CLI脚本+systemd每日timer+批量同步接口+前端按钮）

app/routers/sync.py

@@ -0,0 +1,19 @@
+"""同步相关路由（批量同步操作）"""
+
+from fastapi import APIRouter, Depends
+from sqlmodel import Session
+
+from app.core.security import require_api_key
+from app.database import get_session
+from app.services import sync_service
+
+router = APIRouter(prefix="/api/sync", tags=["sync"])
+
+
+@router.post(
+    "/ai-balances",
+    summary="同步所有 AI 账号余额",
+    dependencies=[Depends(require_api_key)],
+)
+def sync_ai_balances(session: Session = Depends(get_session)) -> dict:
+    return sync_service.sync_all_ai_balances(session)