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/ViewHome.dart

@@ -11,6 +11,7 @@ import '../../about/external/initial/CompletionRequest.dart';
 import '../../about/external/initial/ReportCardRequest.dart';
 import '../../about/internal/application/CommitmentClass.dart';
 import '../../about/internal/application/Standing.dart';
+import '../../about/internal/application/TodoItem.dart';
 import '../../about/internal/application/UserDetails.dart';
 import '../../utils/DebtEngine.dart';
 import '../../utils/GuardrailEngine.dart';
@@ -31,9 +32,20 @@ class ViewHome extends ParentViewModel {
     final UserDetails cached = await getDataManager().getUserDetails();
     connection.onUserLoaded(cached);
 
+    loadTodos();
+
     loadPlan();
   }
 
+  void loadTodos() async {
+    connection.onTodosLoaded(await getDataManager().getTodos());
+  }
+
+  /// Saves the whole list; it is small and only ever lives on the device.
+  void saveTodos(List<TodoItem> todos) async {
+    await getDataManager().setTodos(todos);
+  }
+
   void loadPlan() async {
     if (!await hasNetwork(() => loadPlan())) return;