Rebuild Home around a forest header with streak, score and water

Home now opens on a deep green header: greeting, a Today / Weekly toggle,
a seven-day streak with a leaf on every kept day, minutes held with a +
ring, plan thumbnails, the report-card letter as the score, and one bar per
commitment class (weekly view swaps in per-day bars and class rates). The
+ opens an "Add to today" sheet over the blurred day. A water tracker sits
below the header, kept on the device. The nav marks the selected tab as a
filled block and drops the side action button.

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

@@ -1,5 +1,6 @@
 import '../../about/external/data/Commitment.dart';
 import '../../about/external/data/ExcuseCluster.dart';
+import '../../about/external/data/ReportCard.dart';
 import '../../about/external/data/RoutineChain.dart';
 import '../../about/internal/application/Standing.dart';
 import '../../about/internal/application/TodoItem.dart';
@@ -15,6 +16,13 @@ abstract class ConnectHome {
   /// The routine library, for the up-next rail.
   void onRoutinesLoaded(List<RoutineChain> routines);
 
+  /// This week's report card, for the streak row, the score and the weekly
+  /// view. Null when it could not be loaded.
+  void onWeekLoaded(ReportCard? week);
+
+  /// Water drunk today, in ml.
+  void onWaterLoaded(int ml);
+
   /// The quick to-do list, read from the device.
   void onTodosLoaded(List<TodoItem> todos);