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/ViewHome.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/external/data/pages/request/CommitmentsRequest.dart';
 import '../../about/external/data/pages/request/HistoryRequest.dart';
@@ -34,9 +35,40 @@ class ViewHome extends ParentViewModel {
 
     loadTodos();
 
+    loadWater();
+
+    loadWeek();
+
     loadPlan();
   }
 
+  /// The last seven days. Quiet on failure: the header falls back to today.
+  void loadWeek() async {
+    try {
+      final DateTime now = DateTime.now();
+      final DateTime start = DateTime(now.year, now.month, now.day)
+          .subtract(const Duration(days: 6));
+
+      final response =
+          await getDataManager().getWeeklyReportCard(ReportCardRequest(
+        periodStart: start.toIso8601String(),
+        periodEnd: now.toIso8601String(),
+      ));
+
+      connection.onWeekLoaded(ReportCard.fromJson(response.data));
+    } catch (e) {
+      connection.onWeekLoaded(null);
+    }
+  }
+
+  void loadWater() async {
+    connection.onWaterLoaded(await getDataManager().getWaterToday());
+  }
+
+  void saveWater(int ml) async {
+    await getDataManager().setWaterToday(ml);
+  }
+
   void loadTodos() async {
     connection.onTodosLoaded(await getDataManager().getTodos());
   }