refactor(backend): update API routes and service layer

- Update agent router/service/repository with new endpoints
- Update auth routes with phone-based authentication
- Update users service with new phone lookup
- Update schedule_items with new schemas
- Update message schemas with visibility support
- Update settings with new automation scheduler config
- Update CLI with new commands
- Update tests to match new API contracts

backend/tests/unit/v1/users/test_dependencies.py

@@ -22,7 +22,7 @@ async def test_get_current_user_falls_back_to_supabase_validation(monkeypatch) -
         del token
         return deps.CurrentUser(
             id=UUID("e8845a17-282b-4a63-8025-194a06235958"),
-            email="dagronl@126.com",
+            phone="dagronl@126.com",
             role="authenticated",
         )
 
@@ -31,7 +31,7 @@ async def test_get_current_user_falls_back_to_supabase_validation(monkeypatch) -
     user = await deps.get_current_user(authorization="Bearer valid-token")
 
     assert str(user.id) == "e8845a17-282b-4a63-8025-194a06235958"
-    assert user.email == "dagronl@126.com"
+    assert user.phone == "dagronl@126.com"
 
 
 @pytest.mark.asyncio