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/NewCommitmentState.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:stacked/stacked.dart';
 
 import '../../about/external/data/Commitment.dart';
+import '../../about/external/data/Goal.dart';
 import '../../about/external/initial/CommitmentRequest.dart';
 import '../../about/internal/application/CommitmentClass.dart';
 import '../../about/internal/application/EnergyCost.dart';
@@ -10,6 +11,7 @@ import '../../about/internal/application/NotificationType.dart';
 import '../../about/internal/application/ProofType.dart';
 import '../../about/internal/application/TextType.dart';
 import '../../designs/Component.dart';
+import '../../designs/GoalPicker.dart';
 import '../../designs/Responsive.dart';
 import '../../designs/Shell.dart';
 import '../../designs/buttons/Buttons.dart';
@@ -49,6 +51,9 @@ class NewCommitmentState extends State<NewCommitment>
 
   String _windowError = "";
 
+  /// The goal this task belongs to; null for a loose task.
+  Goal? _goal;
+
   @override
   Widget build(BuildContext context) {
     return ViewModelBuilder<ViewNewCommitment>.reactive(
@@ -76,6 +81,11 @@ class NewCommitmentState extends State<NewCommitment>
     setState(() {
       _windowStart = now;
       _windowEnd = now.add(const Duration(hours: 2));
+      // A task made inside a goal starts in it, at the goal's default weight.
+      if (widget.goal != null) {
+        _goal = widget.goal;
+        _class = widget.goal!.defaultClass;
+      }
     });
   }
 
@@ -85,6 +95,10 @@ class NewCommitmentState extends State<NewCommitment>
     Navigator.pop(context, false);
   }
 
+  void _onPickGoal() {
+    _model?.loadGoals();
+  }
+
   void _onCategoryChanged(String value) {
     _model?.resolveMultiplier(value.trim());
   }
@@ -185,6 +199,7 @@ class NewCommitmentState extends State<NewCommitment>
 
   CommitmentRequest _buildRequest() {
     return CommitmentRequest(
+      parentId: _goal?.id,
       commitmentClass: _class.name,
       title: _title.text.trim(),
       category: _category.text.trim(),
@@ -200,6 +215,7 @@ class NewCommitmentState extends State<NewCommitment>
 
   Commitment _buildCandidate() {
     return Commitment(
+      parentId: _goal?.id,
       commitmentClass: _class,
       title: _title.text.trim(),
       category: _category.text.trim(),
@@ -237,6 +253,14 @@ class NewCommitmentState extends State<NewCommitment>
               validator: Validators.title,
             ),
             const SizedBox(height: 20),
+            selectField(
+              "Goal",
+              _goal?.title ?? "",
+              _onPickGoal,
+              hint: "No goal — a loose task",
+              icon: CupertinoIcons.flag,
+            ),
+            const SizedBox(height: 20),
             inputField(
               "Category",
               _category,
@@ -542,6 +566,20 @@ class NewCommitmentState extends State<NewCommitment>
     });
   }
 
+  @override
+  void onGoalsReady(List<Goal> goals) async {
+    final Goal? picked =
+        await showGoalPicker(context, goals, selectedId: _goal?.id);
+
+    if (picked == null || !mounted) {
+      return;
+    }
+
+    setState(() {
+      _goal = picked.id == null ? null : picked;
+    });
+  }
+
   @override
   void dispose() {
     _title.dispose();