Fix onboarding layout issues

lib/screens/welcome_wizard_screen.dart

@@ -1,6 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 import '../l10n/app_localizations.dart';
+import '../providers/connection_provider.dart';
 import '../services/wizard_preferences.dart';
+import '../widgets/connection_dialog.dart';
 
 /// Welcome wizard screen to introduce new users to the app
 class WelcomeWizardScreen extends StatefulWidget {
@@ -14,12 +17,171 @@ class WelcomeWizardScreen extends StatefulWidget {
 
 class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
   final PageController _pageController = PageController();
+  final TextEditingController _deviceNameController = TextEditingController();
   int _currentPage = 0;
-  static const int _totalPages = 5;
+  bool _isApplyingDeviceSetup = false;
+  static const int _totalPages = 6;
+  static const List<_RadioPreset> _radioPresets = [
+    // Official MeshCore config presets from https://api.meshcore.nz/api/v1/config
+    _RadioPreset(
+      id: 'australia',
+      label: 'Australia',
+      summary: '915.800 MHz, BW 250 kHz, SF10, CR5',
+      frequencyKhz: 915800,
+      bandwidth: 8,
+      spreadingFactor: 10,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'australia_narrow',
+      label: 'Australia (Narrow)',
+      summary: '916.575 MHz, BW 62.5 kHz, SF7, CR8',
+      frequencyKhz: 916575,
+      bandwidth: 6,
+      spreadingFactor: 7,
+      codingRate: 8,
+    ),
+    _RadioPreset(
+      id: 'australia_sa_wa',
+      label: 'Australia: SA, WA',
+      summary: '923.125 MHz, BW 62.5 kHz, SF8, CR8',
+      frequencyKhz: 923125,
+      bandwidth: 6,
+      spreadingFactor: 8,
+      codingRate: 8,
+    ),
+    _RadioPreset(
+      id: 'australia_qld',
+      label: 'Australia: QLD',
+      summary: '923.125 MHz, BW 62.5 kHz, SF8, CR5',
+      frequencyKhz: 923125,
+      bandwidth: 6,
+      spreadingFactor: 8,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'eu_uk_narrow',
+      label: 'EU/UK (Narrow)',
+      summary: '869.618 MHz, BW 62.5 kHz, SF8, CR8',
+      frequencyKhz: 869618,
+      bandwidth: 6,
+      spreadingFactor: 8,
+      codingRate: 8,
+    ),
+    _RadioPreset(
+      id: 'eu_uk_deprecated',
+      label: 'EU/UK (Deprecated)',
+      summary: '869.525 MHz, BW 250 kHz, SF11, CR5',
+      frequencyKhz: 869525,
+      bandwidth: 8,
+      spreadingFactor: 11,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'czech_republic_narrow',
+      label: 'Czech Republic (Narrow)',
+      summary: '869.432 MHz, BW 62.5 kHz, SF7, CR5',
+      frequencyKhz: 869432,
+      bandwidth: 6,
+      spreadingFactor: 7,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'eu_433_long_range',
+      label: 'EU 433MHz (Long Range)',
+      summary: '433.650 MHz, BW 250 kHz, SF11, CR5',
+      frequencyKhz: 433650,
+      bandwidth: 8,
+      spreadingFactor: 11,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'new_zealand',
+      label: 'New Zealand',
+      summary: '917.375 MHz, BW 250 kHz, SF11, CR5',
+      frequencyKhz: 917375,
+      bandwidth: 8,
+      spreadingFactor: 11,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'new_zealand_narrow',
+      label: 'New Zealand (Narrow)',
+      summary: '917.375 MHz, BW 62.5 kHz, SF7, CR5',
+      frequencyKhz: 917375,
+      bandwidth: 6,
+      spreadingFactor: 7,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'portugal_433',
+      label: 'Portugal 433',
+      summary: '433.375 MHz, BW 62.5 kHz, SF9, CR6',
+      frequencyKhz: 433375,
+      bandwidth: 6,
+      spreadingFactor: 9,
+      codingRate: 6,
+    ),
+    _RadioPreset(
+      id: 'portugal_868',
+      label: 'Portugal 868',
+      summary: '869.618 MHz, BW 62.5 kHz, SF7, CR6',
+      frequencyKhz: 869618,
+      bandwidth: 6,
+      spreadingFactor: 7,
+      codingRate: 6,
+    ),
+    _RadioPreset(
+      id: 'switzerland',
+      label: 'Switzerland',
+      summary: '869.618 MHz, BW 62.5 kHz, SF8, CR8',
+      frequencyKhz: 869618,
+      bandwidth: 6,
+      spreadingFactor: 8,
+      codingRate: 8,
+    ),
+    _RadioPreset(
+      id: 'usa_canada_recommended',
+      label: 'USA/Canada (Recommended)',
+      summary: '910.525 MHz, BW 62.5 kHz, SF7, CR5',
+      frequencyKhz: 910525,
+      bandwidth: 6,
+      spreadingFactor: 7,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'vietnam_narrow',
+      label: 'Vietnam (Narrow)',
+      summary: '920.250 MHz, BW 62.5 kHz, SF8, CR5',
+      frequencyKhz: 920250,
+      bandwidth: 6,
+      spreadingFactor: 8,
+      codingRate: 5,
+    ),
+    _RadioPreset(
+      id: 'vietnam_deprecated',
+      label: 'Vietnam (Deprecated)',
+      summary: '920.250 MHz, BW 250 kHz, SF11, CR5',
+      frequencyKhz: 920250,
+      bandwidth: 8,
+      spreadingFactor: 11,
+      codingRate: 5,
+    ),
+  ];
+  _RadioPreset _selectedPreset = _radioPresets[4];
+
+  @override
+  void initState() {
+    super.initState();
+    final deviceInfo = context.read<ConnectionProvider>().deviceInfo;
+    _deviceNameController.text =
+        deviceInfo.selfName ?? deviceInfo.deviceName ?? '';
+  }
 
   @override
   void dispose() {
     _pageController.dispose();
+    _deviceNameController.dispose();
     super.dispose();
   }
 
@@ -30,7 +192,9 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
   }
 
   void _nextPage() {
-    if (_currentPage < _totalPages - 1) {
+    if (_currentPage == 1) {
+      _handleDeviceSetupAction();
+    } else if (_currentPage < _totalPages - 1) {
       _pageController.nextPage(
         duration: const Duration(milliseconds: 300),
         curve: Curves.easeInOut,
@@ -56,6 +220,96 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
     }
   }
 
+  Future<void> _openConnectionDialog() async {
+    await showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      builder: (context) => const ConnectionDialog(),
+    );
+    if (!mounted) return;
+    final connectionProvider = context.read<ConnectionProvider>();
+    if (connectionProvider.deviceInfo.isConnected) {
+      await connectionProvider.refreshDeviceInfo();
+    }
+    if (!mounted) return;
+    final deviceInfo = connectionProvider.deviceInfo;
+    final fetchedName = deviceInfo.selfName ?? deviceInfo.deviceName ?? '';
+    if (fetchedName.isNotEmpty) {
+      setState(() {
+        _deviceNameController.text = fetchedName;
+      });
+    } else {
+      setState(() {});
+    }
+  }
+
+  Future<void> _handleDeviceSetupAction() async {
+    final l10n = AppLocalizations.of(context)!;
+    final connectionProvider = context.read<ConnectionProvider>();
+    final deviceInfo = connectionProvider.deviceInfo;
+    if (!deviceInfo.isConnected) {
+      await _openConnectionDialog();
+      return;
+    }
+
+    final trimmedName = _deviceNameController.text.trim();
+    if (trimmedName.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Enter a device name before continuing.')),
+      );
+      return;
+    }
+
+    setState(() {
+      _isApplyingDeviceSetup = true;
+    });
+
+    try {
+      await connectionProvider.setAdvertName(trimmedName);
+      await connectionProvider.setRadioParams(
+        frequency: _selectedPreset.frequencyKhz,
+        bandwidth: _selectedPreset.bandwidth,
+        spreadingFactor: _selectedPreset.spreadingFactor,
+        codingRate: _selectedPreset.codingRate,
+      );
+      await connectionProvider.refreshDeviceInfo();
+
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('Saved $trimmedName with ${_selectedPreset.label}.'),
+          backgroundColor: Colors.green,
+        ),
+      );
+      _pageController.nextPage(
+        duration: const Duration(milliseconds: 300),
+        curve: Curves.easeInOut,
+      );
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(l10n.failedToSave(e.toString())),
+          backgroundColor: Colors.red,
+        ),
+      );
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isApplyingDeviceSetup = false;
+        });
+      }
+    }
+  }
+
+  void _skipDeviceSetupStep() {
+    if (_isApplyingDeviceSetup) return;
+    _pageController.nextPage(
+      duration: const Duration(milliseconds: 300),
+      curve: Curves.easeInOut,
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
@@ -68,7 +322,7 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
           children: [
             // Top bar with skip button
             Padding(
-              padding: const EdgeInsets.all(16.0),
+              padding: const EdgeInsets.fromLTRB(16, 12, 16, 8),
               child: Row(
                 mainAxisAlignment: MainAxisAlignment.spaceBetween,
                 children: [
@@ -96,8 +350,10 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
               child: PageView(
                 controller: _pageController,
                 onPageChanged: _onPageChanged,
+                physics: const NeverScrollableScrollPhysics(),
                 children: [
                   _buildWelcomePage(context, l10n, colorScheme),
+                  _buildConnectDevicePage(context, l10n, colorScheme),
                   _buildConnectingPage(context, l10n, colorScheme),
                   _buildChannelPage(context, l10n, colorScheme),
                   _buildContactsPage(context, l10n, colorScheme),
@@ -108,7 +364,7 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
 
             // Page indicators
             Padding(
-              padding: const EdgeInsets.all(16.0),
+              padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
               child: Row(
                 mainAxisAlignment: MainAxisAlignment.center,
                 children: List.generate(
@@ -130,11 +386,11 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
 
             // Next/Get Started button
             Padding(
-              padding: const EdgeInsets.all(16.0),
+              padding: const EdgeInsets.fromLTRB(16, 8, 16, 16),
               child: SizedBox(
                 width: double.infinity,
                 child: ElevatedButton(
-                  onPressed: _nextPage,
+                  onPressed: _isApplyingDeviceSetup ? null : _nextPage,
                   style: ElevatedButton.styleFrom(
                     padding: const EdgeInsets.symmetric(vertical: 16.0),
                     shape: RoundedRectangleBorder(
@@ -142,7 +398,9 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
                     ),
                   ),
                   child: Text(
-                    _currentPage < _totalPages - 1
+                    _currentPage == 1
+                        ? _deviceSetupButtonLabel(context)
+                        : _currentPage < _totalPages - 1
                         ? l10n.wizardNext
                         : l10n.wizardGetStarted,
                     style: const TextStyle(fontSize: 16),
@@ -164,8 +422,26 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
     return _buildPage(
       icon: Icons.waving_hand,
       iconColor: Colors.orange,
-      title: l10n.wizardWelcomeTitle,
+      title: 'Welcome to MeshCore SAR',
-      description: l10n.wizardWelcomeDescription,
+      description:
+          'This app combines MeshCore messaging, SAR field updates, mapping, and device tools in one place.',
+      features: [
+        _FeatureItem(
+          icon: Icons.chat_bubble_outline,
+          text:
+              'Send direct, room, and channel messages from the main Messages tab.',
+        ),
+        _FeatureItem(
+          icon: Icons.emergency_share,
+          text:
+              'Share SAR markers, map drawings, voice clips, and images over the mesh.',
+        ),
+        _FeatureItem(
+          icon: Icons.settings_input_antenna,
+          text:
+              'Connect over BLE or TCP, then manage the companion radio from inside the app.',
+        ),
+      ],
       colorScheme: colorScheme,
     );
   }
@@ -176,33 +452,247 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
     ColorScheme colorScheme,
   ) {
     return _buildPage(
-      icon: Icons.bluetooth_searching,
+      icon: Icons.forum_rounded,
       iconColor: Colors.blue,
-      title: l10n.wizardConnectingTitle,
+      title: 'Messaging and Field Reports',
-      description: l10n.wizardConnectingDescription,
+      description:
+          'Messages are more than plain text here. The app already supports several operational payloads and transfer workflows.',
       features: [
-        _FeatureItem(icon: Icons.radio, text: l10n.wizardConnectingFeature1),
+        _FeatureItem(
-        _FeatureItem(icon: Icons.link, text: l10n.wizardConnectingFeature2),
+          icon: Icons.chat,
-        _FeatureItem(icon: Icons.wifi_off, text: l10n.wizardConnectingFeature3),
+          text:
+              'Send direct messages, room posts, and channel traffic from one composer.',
+        ),
+        _FeatureItem(
+          icon: Icons.campaign,
+          text:
+              'Create SAR updates and reusable SAR templates for common field reports.',
+        ),
+        _FeatureItem(
+          icon: Icons.mic,
+          text:
+              'Transfer voice sessions and images, with progress and airtime estimates in the UI.',
+        ),
       ],
       colorScheme: colorScheme,
     );
   }
 
+  Widget _buildConnectDevicePage(
+    BuildContext context,
+    AppLocalizations l10n,
+    ColorScheme colorScheme,
+  ) {
+    final connectionProvider = context.watch<ConnectionProvider>();
+    final deviceInfo = connectionProvider.deviceInfo;
+    final isConnected = deviceInfo.isConnected;
+    final connectedName = deviceInfo.selfName ?? deviceInfo.deviceName;
+
+    return LayoutBuilder(
+      builder: (context, constraints) => Center(
+        child: ConstrainedBox(
+          constraints: BoxConstraints(
+            maxWidth: 600,
+            maxHeight: constraints.maxHeight,
+          ),
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(20, 12, 20, 12),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                _buildPageHeader(
+                  context: context,
+                  colorScheme: colorScheme,
+                  icon: Icons.bluetooth_connected,
+                  iconColor: Colors.green,
+                  title: 'Connect device',
+                  description:
+                      'Connect your MeshCore radio, choose a name, and apply a radio preset before continuing.',
+                  badge: 'Setup',
+                ),
+                const SizedBox(height: 16),
+                _buildContentCard(
+                  colorScheme: colorScheme,
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: [
+                      Row(
+                        children: [
+                          Icon(
+                            isConnected
+                                ? Icons.check_circle
+                                : Icons.bluetooth_searching,
+                            color: isConnected
+                                ? colorScheme.primary
+                                : colorScheme.onSurfaceVariant,
+                          ),
+                          const SizedBox(width: 12),
+                          Expanded(
+                            child: Text(
+                              isConnected
+                                  ? 'Connected to ${connectedName ?? "device"}'
+                                  : 'No device connected yet',
+                              style: Theme.of(context).textTheme.bodyMedium
+                                  ?.copyWith(fontWeight: FontWeight.w600),
+                            ),
+                          ),
+                          TextButton(
+                            onPressed: _openConnectionDialog,
+                            child: Text(isConnected ? 'Change' : l10n.connect),
+                          ),
+                        ],
+                      ),
+                      Align(
+                        alignment: Alignment.centerRight,
+                        child: TextButton(
+                          onPressed: _skipDeviceSetupStep,
+                          child: const Text('Skip for now'),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+                const SizedBox(height: 12),
+                _buildContentCard(
+                  colorScheme: colorScheme,
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: [
+                      TextField(
+                        controller: _deviceNameController,
+                        textInputAction: TextInputAction.done,
+                        decoration: const InputDecoration(
+                          labelText: 'Device name',
+                          border: OutlineInputBorder(),
+                          helperText:
+                              'This name is advertised to other MeshCore users.',
+                        ),
+                      ),
+                      const SizedBox(height: 12),
+                      DropdownButtonFormField<_RadioPreset>(
+                        initialValue: _selectedPreset,
+                        isExpanded: true,
+                        decoration: const InputDecoration(
+                          labelText: 'Config region',
+                          border: OutlineInputBorder(),
+                          helperText:
+                              'Uses the full official MeshCore preset list. Default is EU/UK (Narrow).',
+                        ),
+                        items: _radioPresets
+                            .map(
+                              (preset) => DropdownMenuItem<_RadioPreset>(
+                                value: preset,
+                                child: Text(
+                                  preset.label,
+                                  overflow: TextOverflow.ellipsis,
+                                ),
+                              ),
+                            )
+                            .toList(),
+                        onChanged: (preset) {
+                          if (preset == null) return;
+                          setState(() {
+                            _selectedPreset = preset;
+                          });
+                        },
+                      ),
+                    ],
+                  ),
+                ),
+                const SizedBox(height: 16),
+                _buildContentCard(
+                  colorScheme: colorScheme,
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text(
+                        _selectedPreset.label,
+                        style: Theme.of(context).textTheme.titleMedium
+                            ?.copyWith(fontWeight: FontWeight.w700),
+                      ),
+                      const SizedBox(height: 4),
+                      Text(
+                        _selectedPreset.summary,
+                        style: Theme.of(context).textTheme.bodyMedium,
+                      ),
+                      const SizedBox(height: 14),
+                      ...[
+                        _FeatureItem(
+                          icon: Icons.rule,
+                          text:
+                              'Make sure the selected preset matches your local radio regulations.',
+                        ),
+                        _FeatureItem(
+                          icon: Icons.settings_input_antenna,
+                          text:
+                              'The list matches the official MeshCore config tool preset feed.',
+                        ),
+                        _FeatureItem(
+                          icon: Icons.public,
+                          text:
+                              'EU/UK (Narrow) stays selected by default for onboarding.',
+                        ),
+                      ].map(
+                        (feature) => Padding(
+                          padding: const EdgeInsets.symmetric(vertical: 5),
+                          child: _buildFeatureRow(
+                            context,
+                            colorScheme,
+                            feature,
+                            iconSize: 20,
+                            gap: 12,
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  String _deviceSetupButtonLabel(BuildContext context) {
+    final isConnected = context
+        .watch<ConnectionProvider>()
+        .deviceInfo
+        .isConnected;
+    if (_isApplyingDeviceSetup) {
+      return 'Saving...';
+    }
+    return isConnected ? 'Save and continue' : 'Connect device';
+  }
+
   Widget _buildChannelPage(
     BuildContext context,
     AppLocalizations l10n,
     ColorScheme colorScheme,
   ) {
     return _buildPage(
-      icon: Icons.campaign,
+      icon: Icons.groups_rounded,
       iconColor: Colors.purple,
-      title: l10n.wizardChannelTitle,
+      title: 'Contacts, Rooms, and Repeaters',
-      description: l10n.wizardChannelDescription,
+      description:
+          'The Contacts tab organizes the network you discover and the routes you learn over time.',
       features: [
-        _FeatureItem(icon: Icons.public, text: l10n.wizardChannelFeature1),
+        _FeatureItem(
-        _FeatureItem(icon: Icons.groups, text: l10n.wizardChannelFeature2),
+          icon: Icons.person_add_alt_1,
-        _FeatureItem(icon: Icons.send, text: l10n.wizardChannelFeature3),
+          text:
+              'Review team members, repeaters, rooms, channels, and pending adverts in one list.',
+        ),
+        _FeatureItem(
+          icon: Icons.route,
+          text:
+              'Use smart ping, room login, learned paths, and route reset tools when connectivity gets messy.',
+        ),
+        _FeatureItem(
+          icon: Icons.hub,
+          text:
+              'Create channels and manage network destinations without leaving the app.',
+        ),
       ],
       colorScheme: colorScheme,
     );
@@ -214,16 +704,26 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
     ColorScheme colorScheme,
   ) {
     return _buildPage(
-      icon: Icons.people,
+      icon: Icons.map_rounded,
       iconColor: Colors.teal,
-      title: l10n.wizardContactsTitle,
+      title: 'Map, Trails, and Shared Geometry',
-      description: l10n.wizardContactsDescription,
+      description:
+          'The app map is tied directly into messaging, tracking, and SAR overlays instead of being a separate viewer.',
       features: [
-        _FeatureItem(icon: Icons.person_add, text: l10n.wizardContactsFeature1),
-        _FeatureItem(icon: Icons.chat, text: l10n.wizardContactsFeature2),
         _FeatureItem(
-          icon: Icons.battery_std,
+          icon: Icons.location_on,
-          text: l10n.wizardContactsFeature3,
+          text:
+              'Track your own position, teammate locations, and movement trails on the map.',
+        ),
+        _FeatureItem(
+          icon: Icons.draw,
+          text:
+              'Open drawings from messages, preview them inline, and remove them from the map when needed.',
+        ),
+        _FeatureItem(
+          icon: Icons.router,
+          text:
+              'Use repeater map views and shared overlays to understand network reach in the field.',
         ),
       ],
       colorScheme: colorScheme,
@@ -236,18 +736,27 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
     ColorScheme colorScheme,
   ) {
     return _buildPage(
-      icon: Icons.map,
+      icon: Icons.tune_rounded,
       iconColor: Colors.red,
-      title: l10n.wizardMapTitle,
+      title: 'Tools Beyond Messaging',
-      description: l10n.wizardMapDescription,
+      description:
+          'There is more here than the four main tabs. The app also includes configuration, diagnostics, and optional sensor workflows.',
       features: [
-        _FeatureItem(icon: Icons.location_on, text: l10n.wizardMapFeature1),
         _FeatureItem(
-          icon: Icons.person_pin_circle,
+          icon: Icons.settings,
-          text: l10n.wizardMapFeature2,
+          text:
+              'Open device config to change radio settings, telemetry, TX power, and companion details.',
+        ),
+        _FeatureItem(
+          icon: Icons.sensors,
+          text:
+              'Enable the Sensors tab when you want watched sensor dashboards and quick refresh actions.',
+        ),
+        _FeatureItem(
+          icon: Icons.analytics_outlined,
+          text:
+              'Use packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.',
         ),
-        _FeatureItem(icon: Icons.offline_pin, text: l10n.wizardMapFeature3),
-        _FeatureItem(icon: Icons.draw, text: l10n.wizardMapFeature4),
       ],
       colorScheme: colorScheme,
     );
@@ -261,67 +770,146 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
     List<_FeatureItem>? features,
     required ColorScheme colorScheme,
   }) {
-    return SingleChildScrollView(
+    return LayoutBuilder(
-      padding: const EdgeInsets.all(24.0),
+      builder: (context, constraints) => Center(
+        child: ConstrainedBox(
+          constraints: BoxConstraints(
+            maxWidth: 560,
+            maxHeight: constraints.maxHeight,
+          ),
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(20, 12, 20, 12),
             child: Column(
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
-          const SizedBox(height: 20),
+                _buildPageHeader(
-          // Icon
+                  context: context,
+                  colorScheme: colorScheme,
+                  icon: icon,
+                  iconColor: iconColor,
+                  title: title,
+                  description: description,
+                  badge: 'Overview',
+                ),
+                if (features != null && features.isNotEmpty) ...[
+                  const SizedBox(height: 18),
+                  _buildContentCard(
+                    colorScheme: colorScheme,
+                    child: Column(
+                      children: features
+                          .map(
+                            (feature) => Padding(
+                              padding: const EdgeInsets.symmetric(vertical: 7),
+                              child: _buildFeatureRow(
+                                context,
+                                colorScheme,
+                                feature,
+                              ),
+                            ),
+                          )
+                          .toList(),
+                    ),
+                  ),
+                ],
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildPageHeader({
+    required BuildContext context,
+    required ColorScheme colorScheme,
+    required IconData icon,
+    required Color iconColor,
+    required String title,
+    required String description,
+    required String badge,
+  }) {
+    return Column(
+      children: [
         Container(
-            padding: const EdgeInsets.all(24.0),
+          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+          decoration: BoxDecoration(
+            color: colorScheme.secondaryContainer,
+            borderRadius: BorderRadius.circular(999),
+          ),
+          child: Text(
+            badge,
+            style: Theme.of(context).textTheme.labelLarge?.copyWith(
+              color: colorScheme.onSecondaryContainer,
+              fontWeight: FontWeight.w700,
+            ),
+          ),
+        ),
+        const SizedBox(height: 12),
+        Container(
+          padding: const EdgeInsets.all(18),
           decoration: BoxDecoration(
             color: iconColor.withValues(alpha: 0.1),
             shape: BoxShape.circle,
           ),
-            child: Icon(icon, size: 80, color: iconColor),
+          child: Icon(icon, size: 56, color: iconColor),
         ),
-          const SizedBox(height: 32),
+        const SizedBox(height: 18),
-          // Title
         Text(
           title,
-            style: Theme.of(context).textTheme.headlineMedium?.copyWith(
+          style: Theme.of(context).textTheme.headlineSmall?.copyWith(
             fontWeight: FontWeight.bold,
             color: colorScheme.onSurface,
           ),
           textAlign: TextAlign.center,
         ),
-          const SizedBox(height: 16),
+        const SizedBox(height: 10),
-          // Description
         Text(
           description,
-            style: Theme.of(context).textTheme.bodyLarge?.copyWith(
+          style: Theme.of(context).textTheme.bodyMedium?.copyWith(
-              color: colorScheme.onSurface.withValues(alpha: 0.7),
+            color: colorScheme.onSurface.withValues(alpha: 0.72),
-              height: 1.5,
+            height: 1.4,
           ),
           textAlign: TextAlign.center,
         ),
-          if (features != null && features.isNotEmpty) ...[
+      ],
-            const SizedBox(height: 32),
+    );
-            // Features list
+  }
-            ...features.map(
+
-              (feature) => Padding(
+  Widget _buildContentCard({
-                padding: const EdgeInsets.symmetric(vertical: 8.0),
+    required ColorScheme colorScheme,
-                child: Row(
+    required Widget child,
+  }) {
+    return Container(
+      padding: const EdgeInsets.all(16),
+      decoration: BoxDecoration(
+        color: colorScheme.surfaceContainerHighest,
+        borderRadius: BorderRadius.circular(18),
+      ),
+      child: child,
+    );
+  }
+
+  Widget _buildFeatureRow(
+    BuildContext context,
+    ColorScheme colorScheme,
+    _FeatureItem feature, {
+    double iconSize = 22,
+    double gap = 14,
+  }) {
+    return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
       children: [
-                    Icon(feature.icon, color: colorScheme.primary, size: 24),
+        Icon(feature.icon, color: colorScheme.primary, size: iconSize),
-                    const SizedBox(width: 16),
+        SizedBox(width: gap),
         Expanded(
           child: Text(
             feature.text,
-                        style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+            style: Theme.of(
-                          color: colorScheme.onSurface,
+              context,
-                        ),
+            ).textTheme.bodyMedium?.copyWith(color: colorScheme.onSurface),
           ),
         ),
       ],
-                ),
-              ),
-            ),
-          ],
-          const SizedBox(height: 20),
-        ],
-      ),
     );
   }
 }
@@ -332,3 +920,23 @@ class _FeatureItem {
 
   _FeatureItem({required this.icon, required this.text});
 }
+
+class _RadioPreset {
+  final String id;
+  final String label;
+  final String summary;
+  final int frequencyKhz;
+  final int bandwidth;
+  final int spreadingFactor;
+  final int codingRate;
+
+  const _RadioPreset({
+    required this.id,
+    required this.label,
+    required this.summary,
+    required this.frequencyKhz,
+    required this.bandwidth,
+    required this.spreadingFactor,
+    required this.codingRate,
+  });
+}

lib/widgets/contacts/add_channel_dialog.dart

@@ -35,16 +35,17 @@ class _AddChannelDialogState extends State<AddChannelDialog> {
   /// Validate channel name
   String? _validateName(String? value) {
     final l10n = AppLocalizations.of(context)!;
+    final trimmedValue = value?.trim() ?? '';
 
-    if (value == null || value.trim().isEmpty) {
+    if (trimmedValue.isEmpty) {
       return l10n.channelNameRequired;
     }
 
-    if (value.length > 31) {
+    if (trimmedValue.length > 31) {
       return l10n.channelNameTooLong;
     }
 
-    if (!_isAscii(value)) {
+    if (!_isAscii(trimmedValue)) {
       return l10n.invalidAsciiCharacters;
     }
 
@@ -105,7 +106,8 @@ class _AddChannelDialogState extends State<AddChannelDialog> {
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
-    final isHashChannel = _nameController.text.startsWith('#');
+    final normalizedName = _nameController.text.trimLeft();
+    final isHashChannel = normalizedName.startsWith('#');
 
     return AlertDialog(
       title: Text(l10n.addChannel),
@@ -163,8 +165,15 @@ class _AddChannelDialogState extends State<AddChannelDialog> {
                 enabled: !_isCreating,
                 maxLength: 31,
                 validator: _validateName,
-                textInputAction: TextInputAction.next,
+                textInputAction: isHashChannel
+                    ? TextInputAction.done
+                    : TextInputAction.next,
                 onChanged: (_) => setState(() {}), // Rebuild to update icon
+                onFieldSubmitted: (_) {
+                  if (isHashChannel) {
+                    _handleCreate();
+                  }
+                },
               ),
               // Channel Secret Field (only show for private channels)
               if (!isHashChannel) ...[

test/widgets/add_channel_dialog_test.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/widgets/contacts/add_channel_dialog.dart';
+
+void main() {
+  Future<void> pumpDialog(
+    WidgetTester tester, {
+    required Future<void> Function(String name, String secret) onCreateChannel,
+  }) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: Builder(
+            builder: (context) => Center(
+              child: AddChannelDialog(onCreateChannel: onCreateChannel),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  testWidgets('submits hash channels with an empty secret', (tester) async {
+    String? submittedName;
+    String? submittedSecret;
+
+    await pumpDialog(
+      tester,
+      onCreateChannel: (name, secret) async {
+        submittedName = name;
+        submittedSecret = secret;
+      },
+    );
+
+    await tester.enterText(find.byType(TextFormField).first, '#slovenia');
+    await tester.pump();
+    await tester.tap(find.text('Create Channel'));
+    await tester.pumpAndSettle();
+
+    expect(submittedName, '#slovenia');
+    expect(submittedSecret, '');
+  });
+
+  testWidgets('uses done action for hash channels', (tester) async {
+    String? submittedName;
+
+    await pumpDialog(
+      tester,
+      onCreateChannel: (name, secret) async {
+        submittedName = name;
+      },
+    );
+
+    await tester.enterText(find.byType(TextFormField).first, '#slovenia');
+    await tester.pump();
+    await tester.testTextInput.receiveAction(TextInputAction.done);
+    await tester.pumpAndSettle();
+
+    expect(submittedName, '#slovenia');
+  });
+}