Add accent colour picker, fix empty user card when accepting friend request, add button to transfer allocations

lib/services/accent_color_service.dart

@@ -0,0 +1,51 @@
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AccentColorService extends ChangeNotifier {
+  static const _prefsKeyUseSystem = 'accent_use_system';
+  static const _prefsKeySeed = 'accent_seed';
+  static const Color defaultSeed = Colors.red;
+
+  bool _useSystem = true;
+  Color _seedColor = defaultSeed;
+  bool _hasSavedSeed = false;
+  bool _loaded = false;
+
+  bool get useSystem => _useSystem;
+  Color get seedColor => _seedColor;
+  bool get hasSavedSeed => _hasSavedSeed;
+  bool get isLoaded => _loaded;
+
+  AccentColorService() {
+    _load();
+  }
+
+  Future<void> _load() async {
+    final prefs = await SharedPreferences.getInstance();
+    _useSystem = prefs.getBool(_prefsKeyUseSystem) ?? true;
+    final seedValue = prefs.getInt(_prefsKeySeed);
+    if (seedValue != null) {
+      _seedColor = Color(seedValue);
+      _hasSavedSeed = true;
+    }
+    _loaded = true;
+    notifyListeners();
+  }
+
+  Future<void> setUseSystem(bool value) async {
+    _useSystem = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_prefsKeyUseSystem, _useSystem);
+    notifyListeners();
+  }
+
+  Future<void> setSeedColor(Color color) async {
+    _seedColor = color;
+    _useSystem = false;
+    _hasSavedSeed = true;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt(_prefsKeySeed, color.toARGB32());
+    await prefs.setBool(_prefsKeyUseSystem, _useSystem);
+    notifyListeners();
+  }
+}

lib/services/data_service/data_service_friendships.dart

@@ -151,6 +151,8 @@ extension DataServiceFriendships on DataService {
       overrideAddressee: targetUser,
     );
     _pendingOutgoing = [friendship, ..._pendingOutgoing];
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
     return friendship;
   }
@@ -159,6 +161,8 @@ extension DataServiceFriendships on DataService {
     final json = await api.post('/friendships/$friendshipId/accept', {});
     final friendship = _parseAndUpsertFriendship(json, fallbackStatus: 'accepted');
     _pendingIncoming = _pendingIncoming.where((f) => f.id != friendshipId).toList();
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
     return friendship;
   }
@@ -177,6 +181,8 @@ extension DataServiceFriendships on DataService {
         _parseAndRemoveFriendship(json, friendshipId, status: 'none');
     _pendingOutgoing =
         _pendingOutgoing.where((f) => f.id != friendshipId).toList();
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
     return friendship;
   }
@@ -193,6 +199,8 @@ extension DataServiceFriendships on DataService {
         _pendingIncoming.where((f) => f.id != friendshipId).toList();
     _pendingOutgoing =
         _pendingOutgoing.where((f) => f.id != friendshipId).toList();
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
   }
 

lib/services/data_service/data_service_traction.dart

@@ -466,6 +466,21 @@ extension DataServiceTraction on DataService {
     }
   }
 
+  Future<void> transferAllocations({
+    required int fromLocoId,
+    required int toLocoId,
+  }) async {
+    try {
+      await api.post('/loco/alloc/transfer', {
+        'loco_id': fromLocoId,
+        'to_loco_id': toLocoId,
+      });
+    } catch (e) {
+      debugPrint('Failed to transfer allocations $fromLocoId -> $toLocoId: $e');
+      rethrow;
+    }
+  }
+
   Future<void> adminDeleteLoco({required int locoId}) async {
     try {
       await api.delete('/loco/admin/delete/$locoId');

lib/services/theme_mode_service.dart

@@ -0,0 +1,47 @@
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class ThemeModeService extends ChangeNotifier {
+  static const _prefsKey = 'theme_mode_preference';
+
+  ThemeMode _mode = ThemeMode.system;
+  bool _loaded = false;
+
+  ThemeMode get mode => _mode;
+  bool get isLoaded => _loaded;
+
+  ThemeModeService() {
+    _load();
+  }
+
+  Future<void> _load() async {
+    final prefs = await SharedPreferences.getInstance();
+    final saved = prefs.getString(_prefsKey);
+    if (saved != null) {
+      switch (saved) {
+        case 'light':
+          _mode = ThemeMode.light;
+          break;
+        case 'dark':
+          _mode = ThemeMode.dark;
+          break;
+        default:
+          _mode = ThemeMode.system;
+      }
+    }
+    _loaded = true;
+    notifyListeners();
+  }
+
+  Future<void> setMode(ThemeMode mode) async {
+    _mode = mode;
+    final prefs = await SharedPreferences.getInstance();
+    final value = switch (mode) {
+      ThemeMode.light => 'light',
+      ThemeMode.dark => 'dark',
+      _ => 'system',
+    };
+    await prefs.setString(_prefsKey, value);
+    notifyListeners();
+  }
+}