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/commitment/ConnectNewCommitment.dart

@@ -1,3 +1,4 @@
+import '../../about/external/data/Goal.dart';
 import '../../utils/CapacityEngine.dart';
 
 abstract class ConnectNewCommitment {
@@ -9,4 +10,7 @@ abstract class ConnectNewCommitment {
   /// The learned multiplier for this category, so the estimate field can show
   /// what the app actually expects the task to take.
   void onMultiplierResolved(double multiplier);
+
+  /// Goals are loaded; open the picker.
+  void onGoalsReady(List<Goal> goals);
 }