feat: ship persistent ai playground and alerts foundation

backend/app/api/v1/dashboard.py

@@ -2,7 +2,7 @@
 
 from datetime import UTC, datetime, timedelta
 from fastapi import APIRouter, Depends
-from sqlalchemy import select, func, text
+from sqlalchemy import case, select, func, text
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.db.session import get_db