feat: fix debug updater

lib/views/dev_menu_view.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 
+import '../utils/app_update_util.dart';
 import '../viewmodels/dev_menu_view_model.dart';
 
 class DevMenuView extends StatefulWidget {
@@ -128,9 +129,9 @@ class _DevMenuViewState extends State<DevMenuView> {
             children: [
               _Tile(
                 icon: Icons.update_rounded,
-                title: 'Mock update available',
-                subtitle: 'Simulate OTA update dialog',
-                onTap: () => _showMockUpdateDialog(),
+                title: 'Simulate update download',
+                subtitle: 'Open the download progress screen',
+                onTap: () => _showSimulateUpdateDialog(),
               ),
             ],
           ),
@@ -209,28 +210,66 @@ class _DevMenuViewState extends State<DevMenuView> {
     );
   }
 
-  void _showMockUpdateDialog() {
+  void _showSimulateUpdateDialog() {
+    final fakeUpdate = UpdateInfo(
+      update: true,
+      version: '99.0.0',
+      notes: 'Bug fixes and performance improvements.',
+      mandatory: false,
+      sha256: 'abc123',
+      download: 'https://example.com/fake-update.apk',
+    );
+
     showDialog(
       context: context,
-      builder: (context) => AlertDialog(
-        title: const Text('Update available'),
-        content: const Column(
+      builder: (dialogContext) => AlertDialog(
+        title: const Text('Simulate update'),
+        content: Column(
           mainAxisSize: MainAxisSize.min,
-          crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Text('Version 99.0.0 is available.'),
-            SizedBox(height: 12),
-            Text('Bug fixes and performance improvements.'),
+            const Text('Choose a simulation mode:'),
+            const SizedBox(height: 16),
+            _SimOption(
+              icon: Icons.download_rounded,
+              label: 'Successful download',
+              description: 'Progress 0→100%, then install, then done',
+              onTap: () {
+                Navigator.pop(dialogContext);
+                context.push(
+                  '/update-progress?simulate=true',
+                  extra: fakeUpdate,
+                );
+              },
+            ),
+            const SizedBox(height: 8),
+            _SimOption(
+              icon: Icons.error_outline_rounded,
+              label: 'Download error',
+              description: 'Fails at 50% with a network timeout',
+              onTap: () {
+                Navigator.pop(dialogContext);
+                context.push(
+                  '/update-progress?simulate=true&simulateError=true',
+                  extra: fakeUpdate,
+                );
+              },
+            ),
+            const SizedBox(height: 8),
+            _SimOption(
+              icon: Icons.wifi_off_rounded,
+              label: 'Real download (will fail)',
+              description: 'Attempts real OTA with fake URL',
+              onTap: () {
+                Navigator.pop(dialogContext);
+                context.push('/update-progress', extra: fakeUpdate);
+              },
+            ),
           ],
         ),
         actions: [
           TextButton(
-            onPressed: () => Navigator.pop(context),
-            child: const Text('Later'),
-          ),
-          FilledButton(
-            onPressed: () => Navigator.pop(context),
-            child: const Text('Update'),
+            onPressed: () => Navigator.pop(dialogContext),
+            child: const Text('Cancel'),
           ),
         ],
       ),
@@ -238,6 +277,56 @@ class _DevMenuViewState extends State<DevMenuView> {
   }
 }
 
+class _SimOption extends StatelessWidget {
+  final IconData icon;
+  final String label;
+  final String description;
+  final VoidCallback onTap;
+
+  const _SimOption({
+    required this.icon,
+    required this.label,
+    required this.description,
+    required this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      color: Theme.of(context).colorScheme.surfaceContainerHighest,
+      borderRadius: BorderRadius.circular(12),
+      child: InkWell(
+        borderRadius: BorderRadius.circular(12),
+        onTap: onTap,
+        child: Padding(
+          padding: const EdgeInsets.all(12),
+          child: Row(
+            children: [
+              Icon(icon, size: 28),
+              const SizedBox(width: 12),
+              Expanded(
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(label, style: Theme.of(context).textTheme.titleSmall),
+                    Text(
+                      description,
+                      style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                        color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.6),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              const Icon(Icons.chevron_right_rounded),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
 class _Section extends StatelessWidget {
   final String title;
   final List<Widget> children;