Add breakpoint-responsive smoke tests and overflow fixes

docs/progress.md

@@ -27,6 +27,25 @@ Validation for this milestone:
 - `flutter analyze` -> pass
 - `flutter test` -> pass
 
+### Breakpoint QA follow-up
+
+Ran targeted responsive smoke checks for:
+
+- iPhone SE (`320x568`)
+- iPhone Pro Max (`430x932`)
+- iPad portrait (`768x1024`)
+- Web/desktop (`1280x800`)
+
+Follow-up fixes from QA:
+
+- `lib/features/auth/sign_in_view.dart`
+  - added scroll-safe container for short-height screens to prevent vertical overflow
+- `lib/features/home/app_shell.dart`
+  - made sidebar brand text ellipsize-safe to prevent horizontal overflow
+- Added automated responsive regression suite:
+  - `test/features/responsive/responsive_views_smoke_test.dart`
+  - validates `AppShell` + all primary views across the breakpoints above
+
 ## Latest Milestone (2026-02-15): People Mobile Layout Fix
 
 Fixed the `People` view so it is mobile-friendly and no longer overflows on iOS narrow screens: