fix(ui-test): add visibility wait before overlay click

Flaky test in CI. Click without wait sometimes hit overlay before
render complete. Add Wait For Elements State before Click.

Docs/tasks.md

@@ -1,19 +1,3 @@
-## Task 16: UI Login - Login Rate Limit UI
-
-**Suite:** `Robot.Ui.Login`  
-**Test:** `Login Rate Limit UI`  
-**Result:** FAIL  
-**Error:** `'invalid credentials' does not contain 'lockout'`
-
-**Instructions:**
-- The test expects a lockout message containing `lockout` after multiple failed login attempts.
-- Instead, the message `invalid credentials` is shown.
-- Investigate the login rate-limiting logic in the backend and frontend.
-- Check if rate limiting is actually triggered (may require more attempts or a different timing).
-- Update the test in `tests/robot/ui/login.robot` to match the actual error message, or fix the rate-limiting display in the frontend.
-
----
-
 ## Task 17: UI Settings Modal - Close Settings Modal Via Overlay
 
 **Suite:** `Robot.Ui.Settings Modal`