feat(app): add maps navigation page

flutter_app/lib/src/agent_home_page.dart

@@ -213,6 +213,14 @@ class _AgentHomePageState extends State<AgentHomePage>
     _inputController.selection = TextSelection.collapsed(offset: text.length);
   }
 
+  void _prefillChatPrompt(String text) {
+    setState(() {
+      _inputController.text = text;
+      _inputController.selection = TextSelection.collapsed(offset: text.length);
+      _selectedView = AppView.chat;
+    });
+  }
+
   Future<void> _sendMessage() async {
     final text = _inputController.text.trim();
     if (text.isEmpty || _isSending) return;
@@ -298,6 +306,7 @@ class _AgentHomePageState extends State<AgentHomePage>
       onDeleteSession: _deleteSession,
       onSuggestionSelected: _useSuggestion,
       onSend: _sendMessage,
+      onAskAssistant: _prefillChatPrompt,
       onLogout: widget.onLogout,
       onSaveProfile: widget.onSaveProfile,
       onSaveAgentConfig: _saveAgentConfig,

flutter_app/lib/src/map_location_models.dart

@@ -0,0 +1,78 @@
+import 'dart:convert';
+
+class MapLocation {
+  const MapLocation({
+    required this.name,
+    required this.latitude,
+    required this.longitude,
+    this.address,
+    this.category,
+    this.source = 'nominatim',
+  });
+
+  final String name;
+  final double latitude;
+  final double longitude;
+  final String? address;
+  final String? category;
+  final String source;
+
+  String get coordinateText =>
+      '${latitude.toStringAsFixed(5)}, ${longitude.toStringAsFixed(5)}';
+
+  String get mapsQuery => Uri.encodeComponent('$latitude,$longitude ($name)');
+
+  String assistantPrompt() {
+    final buffer = StringBuffer()
+      ..writeln('I selected this destination in StudyOS Maps:')
+      ..writeln('- Name: $name')
+      ..writeln('- Coordinates: $coordinateText')
+      ..writeln('- Source: $source');
+    if (address != null && address!.isNotEmpty) {
+      buffer.writeln('- Address: $address');
+    }
+    if (category != null && category!.isNotEmpty) {
+      buffer.writeln('- Category: $category');
+    }
+    buffer
+      ..writeln()
+      ..writeln(
+        'Please explain what is useful to know about this place, how I could get there from my current study context, and any navigation options or caveats.',
+      );
+    return buffer.toString().trim();
+  }
+
+  static MapLocation? fromNominatimJson(Map<String, Object?> json) {
+    final lat = double.tryParse(json['lat']?.toString() ?? '');
+    final lon = double.tryParse(json['lon']?.toString() ?? '');
+    final displayName = json['display_name']?.toString().trim();
+    if (lat == null ||
+        lon == null ||
+        displayName == null ||
+        displayName.isEmpty) {
+      return null;
+    }
+    final namedParts = displayName.split(',');
+    final name = namedParts.first.trim();
+    return MapLocation(
+      name: name.isEmpty ? displayName : name,
+      latitude: lat,
+      longitude: lon,
+      address: displayName,
+      category: json['type']?.toString(),
+    );
+  }
+}
+
+List<MapLocation> mapLocationsFromNominatim(String body) {
+  final decoded = jsonDecode(body);
+  if (decoded is! List) return const <MapLocation>[];
+  return decoded
+      .whereType<Map>()
+      .map(
+        (item) =>
+            MapLocation.fromNominatimJson(Map<String, Object?>.from(item)),
+      )
+      .whereType<MapLocation>()
+      .toList(growable: false);
+}

flutter_app/lib/src/map_search_client.dart

@@ -0,0 +1,50 @@
+import 'package:http/http.dart' as http;
+
+import 'map_location_models.dart';
+
+class MapSearchClient {
+  MapSearchClient({http.Client? client})
+    : _client = client ?? http.Client(),
+      _ownsClient = client == null;
+
+  final http.Client _client;
+  final bool _ownsClient;
+
+  Future<List<MapLocation>> search(String query) async {
+    final trimmed = query.trim();
+    if (trimmed.isEmpty) return const <MapLocation>[];
+    final uri = Uri.https('nominatim.openstreetmap.org', '/search', {
+      'format': 'jsonv2',
+      'limit': '8',
+      'addressdetails': '1',
+      'bounded': '1',
+      'viewbox': '8.93,48.57,9.16,48.47',
+      'q': '$trimmed Tuebingen',
+    });
+    final response = await _client.get(
+      uri,
+      headers: const <String, String>{
+        'User-Agent': 'StudyOS Agent course prototype',
+      },
+    );
+    if (response.statusCode < 200 || response.statusCode >= 300) {
+      throw MapSearchException(
+        'Search failed with HTTP ${response.statusCode}.',
+      );
+    }
+    return mapLocationsFromNominatim(response.body);
+  }
+
+  void close() {
+    if (_ownsClient) _client.close();
+  }
+}
+
+class MapSearchException implements Exception {
+  const MapSearchException(this.message);
+
+  final String message;
+
+  @override
+  String toString() => message;
+}

flutter_app/lib/src/models.dart

@@ -60,7 +60,7 @@ class ChatMessage {
   }
 }
 
-enum AppView { home, chat, schedule, mail, campus, memories, settings }
+enum AppView { home, chat, schedule, mail, maps, campus, memories, settings }
 
 enum AgentProvider { local, cloud }
 

flutter_app/lib/src/views/agent_selected_view.dart

@@ -7,6 +7,7 @@ import 'campus_view.dart';
 import 'chat_view.dart';
 import 'home_view.dart';
 import 'mail_view.dart';
+import 'maps_view.dart';
 import 'memories_view.dart';
 import 'schedule_view.dart';
 import 'settings_view.dart';
@@ -22,6 +23,7 @@ class AgentSelectedView extends StatelessWidget {
     required this.compactMessages,
     required this.onSuggestionSelected,
     required this.onSend,
+    required this.onAskAssistant,
     required this.onSelectView,
     required this.worldState,
     required this.memoryText,
@@ -50,6 +52,7 @@ class AgentSelectedView extends StatelessWidget {
   final bool compactMessages;
   final ValueChanged<String> onSuggestionSelected;
   final VoidCallback onSend;
+  final ValueChanged<String> onAskAssistant;
   final ValueChanged<AppView> onSelectView;
   final Map<String, Object?> worldState;
   final String memoryText;
@@ -77,6 +80,7 @@ class AgentSelectedView extends StatelessWidget {
         memoryText: memoryText,
         timetable: timetable,
         onOpenMail: () => onSelectView(AppView.mail),
+        onOpenMaps: () => onSelectView(AppView.maps),
         onOpenCampus: () => onSelectView(AppView.campus),
         onOpenSchedule: () => onSelectView(AppView.schedule),
       ),
@@ -97,6 +101,7 @@ class AgentSelectedView extends StatelessWidget {
         onRefresh: onRefreshTimetable,
       ),
       AppView.mail => MailView(profile: profile),
+      AppView.maps => MapsView(onAskAssistant: onAskAssistant),
       AppView.campus => CampusView(profile: profile),
       AppView.memories => MemoriesView(
         worldState: worldState,

flutter_app/lib/src/views/home_view.dart

@@ -11,6 +11,7 @@ class HomeView extends StatelessWidget {
     required this.memoryText,
     required this.timetable,
     required this.onOpenMail,
+    required this.onOpenMaps,
     required this.onOpenCampus,
     required this.onOpenSchedule,
     super.key,
@@ -21,6 +22,7 @@ class HomeView extends StatelessWidget {
   final String memoryText;
   final TimetableSnapshot? timetable;
   final VoidCallback onOpenMail;
+  final VoidCallback onOpenMaps;
   final VoidCallback onOpenCampus;
   final VoidCallback onOpenSchedule;
 
@@ -69,6 +71,11 @@ class HomeView extends StatelessWidget {
               label: 'Mail',
               value: profile == null ? 'Sign in needed' : 'Local tools ready',
             ),
+            const _HomeStatusItem(
+              icon: Icons.map_outlined,
+              label: 'Map',
+              value: 'Tübingen',
+            ),
           ],
         ),
         const SizedBox(height: StudyOsSpacing.lg),
@@ -86,6 +93,14 @@ class HomeView extends StatelessWidget {
           onTap: onOpenMail,
         ),
         const SizedBox(height: StudyOsSpacing.md),
+        _HomeCard(
+          key: const ValueKey<String>('home-maps-card'),
+          icon: Icons.map_outlined,
+          title: 'Navigate',
+          body: 'Search destinations and ask StudyOS about routes.',
+          onTap: onOpenMaps,
+        ),
+        const SizedBox(height: StudyOsSpacing.md),
         _HomeCard(
           key: const ValueKey<String>('home-campus-card'),
           icon: Icons.restaurant_outlined,