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/designs/Responsive.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+
+import '../about/internal/application/TextType.dart';
+import 'text/Text.dart';
+
+class Responsive extends StatelessWidget {
+  final Widget mobile;
+  final Widget tablet;
+  final Widget desktop;
+
+  const Responsive({
+    super.key,
+    required this.desktop,
+    required this.mobile,
+    required this.tablet,
+  });
+
+  /// mobile < 650
+  static bool isMobile(BuildContext context) =>
+      MediaQuery.sizeOf(context).width < 650;
+
+  /// tablet >= 650
+  static bool isTablet(BuildContext context) =>
+      MediaQuery.sizeOf(context).width >= 650;
+
+  /// desktop >= 1100
+  static bool isDesktop(BuildContext context) =>
+      MediaQuery.sizeOf(context).width >= 1100;
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(builder: (context, constraints) {
+      if (isDesktop(context)) {
+        return desktop;
+      } else if (isTablet(context)) {
+        return tablet;
+      } else if (isMobile(context)) {
+        return mobile;
+      } else {
+        return SizedBox(
+          width: double.infinity,
+          height: double.infinity,
+          child: Column(
+            mainAxisSize: MainAxisSize.max,
+            crossAxisAlignment: CrossAxisAlignment.center,
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [text("NOT SUPPORTED", 12, TextType.Bold)],
+          ),
+        );
+      }
+    });
+  }
+}