Move hardcoded configuration to environment variables

.env.example

@@ -98,4 +98,32 @@ DEFAULT_NOTIFICATION_CHANNEL_ID=default_channel
 PLATFORM_COMMISSION_RATE=0.10
 
 # Provider payout (default: 90%)
-PROVIDER_PAYOUT_RATE=0.90
+PROVIDER_PAYOUT_RATE=0.90
+
+# ============================================================================
+# NOTIFICATION CONFIGURATION
+# ============================================================================
+
+# Notification channel ID (default: high_importance_channel)
+NOTIFICATION_CHANNEL_ID=high_importance_channel
+
+# Notification channel name (default: High Importance Notifications)
+NOTIFICATION_CHANNEL_NAME=High Importance Notifications
+
+# Notification channel description
+NOTIFICATION_CHANNEL_DESCRIPTION=This channel is used for important notifications.
+
+# LED timing for notifications (in milliseconds)
+LED_ON_MS=1000
+LED_OFF_MS=500
+
+# Notification icon (default: @mipmap/ic_launcher)
+NOTIFICATION_ICON=@mipmap/ic_launcher
+
+# ============================================================================
+# MAP CONFIGURATION
+# ============================================================================
+
+# Near distance threshold in meters (default: 5000 for 5km)
+# Used to determine if a task location is considered "near" the user
+NEAR_DISTANCE_THRESHOLD=5000

lib/config/app_config.dart

@@ -210,4 +210,56 @@ class AppConfig {
       return 0.90;
     }
   }
+
+  // ============================================================================
+  // NOTIFICATION CONFIGURATION
+  // ============================================================================
+
+  /// Notification Channel ID
+  static String get notificationChannelId => 
+      _getEnv('NOTIFICATION_CHANNEL_ID', 'high_importance_channel');
+
+  /// Notification Channel Name
+  static String get notificationChannelName => 
+      _getEnv('NOTIFICATION_CHANNEL_NAME', 'High Importance Notifications');
+
+  /// Notification Channel Description
+  static String get notificationChannelDescription => 
+      _getEnv('NOTIFICATION_CHANNEL_DESCRIPTION', 'This channel is used for important notifications.');
+
+  /// LED On Duration in milliseconds
+  static int get ledOnMs {
+    try {
+      return int.tryParse(_getEnv('LED_ON_MS', '1000')) ?? 1000;
+    } catch (e) {
+      return 1000;
+    }
+  }
+
+  /// LED Off Duration in milliseconds
+  static int get ledOffMs {
+    try {
+      return int.tryParse(_getEnv('LED_OFF_MS', '500')) ?? 500;
+    } catch (e) {
+      return 500;
+    }
+  }
+
+  /// Notification Icon
+  static String get notificationIcon => 
+      _getEnv('NOTIFICATION_ICON', '@mipmap/ic_launcher');
+
+  // ============================================================================
+  // MAP CONFIGURATION
+  // ============================================================================
+
+  /// Near Distance Threshold in meters (e.g., 5000 for 5km)
+  /// Used to determine if a task location is considered "near" the user
+  static double get nearDistanceThreshold {
+    try {
+      return double.tryParse(_getEnv('NEAR_DISTANCE_THRESHOLD', '5000')) ?? 5000;
+    } catch (e) {
+      return 5000;
+    }
+  }
 }

lib/core/constants/app_constants.dart

@@ -1,18 +1,23 @@
+import 'package:connect/config/app_config.dart';
+
 /// App-wide constants
 class AppConstants {
   AppConstants._();
 
   static const String appName = 'Connect';
   static const String appTitle = 'Connect';
 
-  static const String notificationChannelId = 'high_importance_channel';
-  static const String notificationChannelName = 'High Importance Notifications';
-  static const String notificationChannelDescription =
-      'This channel is used for important notifications.';
+  /// Notification channel configuration loaded from AppConfig
+  static String get notificationChannelId => AppConfig.notificationChannelId;
+  static String get notificationChannelName => AppConfig.notificationChannelName;
+  static String get notificationChannelDescription => AppConfig.notificationChannelDescription;
 
-  static const int ledOnMs = 1000;
-  static const int ledOffMs = 500;
-  static const String notificationIcon = '@mipmap/ic_launcher';
+  /// LED timing configuration loaded from AppConfig (in milliseconds)
+  static int get ledOnMs => AppConfig.ledOnMs;
+  static int get ledOffMs => AppConfig.ledOffMs;
+
+  /// Notification icon loaded from AppConfig
+  static String get notificationIcon => AppConfig.notificationIcon;
 
   static const String envFileName = '.env';
 }

lib/core/services/notification_service.dart

@@ -18,7 +18,7 @@ class NotificationService {
     if (kIsWeb) return;
 
     try {
-      const channel = AndroidNotificationChannel(
+      final channel = AndroidNotificationChannel(
         AppConstants.notificationChannelId,
         AppConstants.notificationChannelName,
         description: AppConstants.notificationChannelDescription,
@@ -27,7 +27,7 @@ class NotificationService {
         enableVibration: true,
       );
 
-      const androidSettings = AndroidInitializationSettings(
+      final androidSettings = AndroidInitializationSettings(
         AppConstants.notificationIcon,
       );
 
@@ -37,7 +37,7 @@ class NotificationService {
         requestSoundPermission: true,
       );
 
-      const initializationSettings = InitializationSettings(
+      final initializationSettings = InitializationSettings(
         android: androidSettings,
         iOS: iosSettings,
       );
@@ -89,7 +89,7 @@ class NotificationService {
 
   /// Get notification details for Android and iOS
   static NotificationDetails _getNotificationDetails() {
-    return const NotificationDetails(
+    return NotificationDetails(
       android: AndroidNotificationDetails(
         AppConstants.notificationChannelId,
         AppConstants.notificationChannelName,
@@ -103,7 +103,7 @@ class NotificationService {
         ledOnMs: AppConstants.ledOnMs,
         ledOffMs: AppConstants.ledOffMs,
       ),
-      iOS: DarwinNotificationDetails(
+      iOS: const DarwinNotificationDetails(
         presentAlert: true,
         presentBadge: true,
         presentSound: true,

lib/search_tasks/mappoints/points.dart

@@ -38,7 +38,9 @@ class _TaskMapScreenState extends State<TaskMapScreen> {
   BitmapDescriptor? _customMarkerIcon;
   BitmapDescriptor? _nearMarkerIcon;
   BitmapDescriptor? _farMarkerIcon;
-  static const double _nearDistanceThreshold = 5000; // 5km threshold
+
+  // Get near distance threshold from configuration (in meters)
+  double get _nearDistanceThreshold => AppConfig.nearDistanceThreshold;
 
   // Route-related variables
   bool _isRouteLoading = false;