Add routines module and full goal management

Routines: workout, meditation and must-do routines with timed, rep and
tick steps, sets and rest. A library screen, a builder with templates
and drag-to-reorder steps, and a full-screen player that auto-advances
timed phases, counts backgrounding and logs broken chains as partial.

Goals: a goal editor (deadline, colour, category, default class, archive),
routines linked to goals, and a goal field on tasks and routines. Tasks
added from inside a goal are now actually attached to it via parentId.

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

frontend/lib/Grounded/see/routine/ViewRoutineBuilder.dart

@@ -0,0 +1,57 @@
+import '../../about/external/data/RoutineChain.dart';
+import '../../about/external/data/pages/request/HistoryRequest.dart';
+import '../../about/external/data/pages/request/PageAndSort.dart';
+import '../../about/external/data/pages/request/Pageable.dart';
+import '../../about/external/data/pages/request/Sort.dart';
+import '../../utils/ObjectConvertors.dart';
+import '../parent/ParentViewModel.dart';
+import 'ConnectRoutineBuilder.dart';
+
+class ViewRoutineBuilder extends ParentViewModel {
+  ConnectRoutineBuilder connection;
+
+  ViewRoutineBuilder(super.context, this.connection);
+
+  /// Goals for the picker — loaded on tap, never up front.
+  void loadGoals() async {
+    if (!await hasNetwork(() => loadGoals())) return;
+
+    showLoading("Loading goals");
+
+    try {
+      final response = await getDataManager().getMyGoals(HistoryRequest(
+        query: PageAndSort(
+          sort: Sort('desc', 'startDate'),
+          page: Pageable(0, 0, 50, 0),
+        ),
+      ));
+
+      closeLoading();
+
+      connection.onGoalsReady(getGoalList(response.data));
+    } catch (e) {
+      handleError(e, () => loadGoals(), () => dismissError(), "Retry");
+    }
+  }
+
+  void save(RoutineChain routine) async {
+    if (!await hasNetwork(() => save(routine))) return;
+
+    showLoading("Saving routine");
+
+    try {
+      for (int index = 0; index < routine.steps.length; index++) {
+        routine.steps[index].order = index;
+        routine.steps[index].completed = false;
+      }
+
+      await getDataManager().saveRoutineEntry(routine.toJson());
+
+      closeLoading();
+
+      connection.onSaved();
+    } catch (e) {
+      handleError(e, () => save(routine), () => dismissError(), "Retry");
+    }
+  }
+}