Initial commit: Grounded Flutter frontend

A to-do app that doesn't believe you — an enforcement layer rather than a
neutral ledger.

Architecture ported from Autoreceptives/Frontend/Receptive: stacked MVVM with
the mandatory 4-file screen pattern, one ParentViewModel owning the loading /
network / error overlays and the handleError decision tree, one AppDataManager
gateway, dio comms carrying the three identity headers, secure storage with
random-suffixed keys, and a single-chokepoint Navigator. Package root and Dart
package name are both Grounded; org is nya.

The enforcement engine, one unit per formula in utils/:

- DebtEngine      w(class) x severity(d) x decay(t), sublinear severity so old
                  misses cannot swamp the score; abandonment 2x with 30-day
                  decay immunity; late complete retains 30%
- StandingEngine  Good -> Warned -> Grounded -> Lockdown, derived not set;
                  Grounded replaces home with the overdue queue
- CapacityEngine  blocks over-scheduling against p50 of historically completed
                  minutes, with a learned per-category estimation multiplier
- IntegrityEngine session integrity, weekly volume, plyometric contact ceiling
                  and enforced recovery gaps
- ExcuseAnalyser  on-device excuse clustering plus the confrontation copy
- GuardrailEngine distress detection and rationed amnesty
- ToneEngine      all enforcement copy, so the tone cap lives in one place

CommitmentEvent is append-only and is the source of truth rather than the
status field, which is what makes honest history and excuse analysis possible.

Goals contain commitments via parentId, and a task can be run from a
full-screen runner that derives elapsed time from wall-clock so screen-off
cannot lose time. Backgrounding pauses the clock and is counted. The runner is
mirrored into an ongoing notification, with alarm-class full-screen intents
reserved for non-negotiables.

Design language, fonts, icon and native splash are in place; Mason bricks are
retargeted to this project and verified end-to-end.

flutter analyze lib/ reports no errors.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mfu2gQLSFN21YRBcU2NrTt

frontend/lib/Grounded/about/external/data/ExercisePrescription.dart

@@ -0,0 +1,91 @@
+import '../../internal/application/ProgressionRule.dart';
+
+class ExercisePrescription {
+  String? id;
+
+  String sessionTemplateId;
+
+  String exerciseId;
+
+  String exerciseName;
+
+  /// Primary muscle group, for weekly volume tracking.
+  String muscleGroup;
+
+  int sets;
+
+  int targetReps;
+
+  /// For timed holds and intervals; 0 when the work is rep-based.
+  int targetTimeSeconds;
+
+  int restSeconds;
+
+  /// Eccentric-pause-concentric-pause, e.g. "3010".
+  String tempo;
+
+  ProgressionRule progressionRule;
+
+  /// Ground contacts per set, for the plyometric weekly ceiling.
+  int contactsPerSet;
+
+  /// Whether this is a hard exercise for integrity scoring. Derived from
+  /// historical RPE rather than set statically.
+  bool hard;
+
+  ExercisePrescription({
+    this.id,
+    this.sessionTemplateId = "",
+    this.exerciseId = "",
+    this.exerciseName = "",
+    this.muscleGroup = "",
+    this.sets = 0,
+    this.targetReps = 0,
+    this.targetTimeSeconds = 0,
+    this.restSeconds = 0,
+    this.tempo = "",
+    this.progressionRule = ProgressionRule.Reps,
+    this.contactsPerSet = 0,
+    this.hard = false,
+  });
+
+  factory ExercisePrescription.fromJson(Map<String, dynamic> json) {
+    return ExercisePrescription(
+      id: json['id'],
+      sessionTemplateId: json['sessionTemplateId'] ?? "",
+      exerciseId: json['exerciseId'] ?? "",
+      exerciseName: json['exerciseName'] ?? "",
+      muscleGroup: json['muscleGroup'] ?? "",
+      sets: json['sets'] ?? 0,
+      targetReps: json['targetReps'] ?? 0,
+      targetTimeSeconds: json['targetTimeSeconds'] ?? 0,
+      restSeconds: json['restSeconds'] ?? 0,
+      tempo: json['tempo'] ?? "",
+      progressionRule: getProgressionRule(json['progressionRule']),
+      contactsPerSet: json['contactsPerSet'] ?? 0,
+      hard: json['hard'] ?? false,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = <String, dynamic>{};
+    data['id'] = id;
+    data['sessionTemplateId'] = sessionTemplateId;
+    data['exerciseId'] = exerciseId;
+    data['exerciseName'] = exerciseName;
+    data['muscleGroup'] = muscleGroup;
+    data['sets'] = sets;
+    data['targetReps'] = targetReps;
+    data['targetTimeSeconds'] = targetTimeSeconds;
+    data['restSeconds'] = restSeconds;
+    data['tempo'] = tempo;
+    data['progressionRule'] = progressionRule.name;
+    data['contactsPerSet'] = contactsPerSet;
+    data['hard'] = hard;
+    return data;
+  }
+
+  int get plannedContacts {
+    return contactsPerSet * sets;
+  }
+}