Square every corner, enlarge the main surfaces and add a to-do list

Rounded rectangles and round controls are now square across the app; only
status dots, glows, the sun, rings and the breathing circle stay round.
Cards, rows, thumbnails, featured cards, category tiles, the standing card
and the nav are larger. Home gets a quick To-do list kept on the device
(TodoItem in InternalMemory), seeded with sample items in mock mode.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KhQh614DMeYoQEH9SoMRUw

frontend/lib/Grounded/see/home/ConnectHome.dart

@@ -2,6 +2,7 @@ import '../../about/external/data/Commitment.dart';
 import '../../about/external/data/ExcuseCluster.dart';
 import '../../about/external/data/RoutineChain.dart';
 import '../../about/internal/application/Standing.dart';
+import '../../about/internal/application/TodoItem.dart';
 import '../../about/internal/application/UserDetails.dart';
 
 abstract class ConnectHome {
@@ -14,6 +15,9 @@ abstract class ConnectHome {
   /// The routine library, for the up-next rail.
   void onRoutinesLoaded(List<RoutineChain> routines);
 
+  /// The quick to-do list, read from the device.
+  void onTodosLoaded(List<TodoItem> todos);
+
   /// Standing arrives derived, with the debt it was derived from.
   void onStandingResolved(Standing standing, double debtScore);