chore: update dependencies and enhance connectivity service

- Added `connectivity_plus` dependency to manage network connectivity status.
- Updated `pubspec.yaml` to include the new dependency version.
- Enhanced `ConnectivityService` to utilize `connectivity_plus` for improved connectivity monitoring and handling.
- Refactored connectivity checks and state management for better performance and reliability.

ios/Podfile.lock

@@ -34,6 +34,8 @@ PODS:
     - DKImagePickerController/PhotoGallery
     - Flutter
   - Flutter (1.0.0)
+  - flutter_local_notifications (0.0.1):
+    - Flutter
   - flutter_native_splash (2.4.3):
     - Flutter
   - flutter_secure_storage (6.0.0):
@@ -82,6 +84,7 @@ PODS:
 DEPENDENCIES:
   - file_picker (from `.symlinks/plugins/file_picker/ios`)
   - Flutter (from `Flutter`)
+  - flutter_local_notifications (from `.symlinks/plugins/flutter_local_notifications/ios`)
   - flutter_native_splash (from `.symlinks/plugins/flutter_native_splash/ios`)
   - flutter_secure_storage (from `.symlinks/plugins/flutter_secure_storage/ios`)
   - flutter_tts (from `.symlinks/plugins/flutter_tts/ios`)
@@ -111,6 +114,8 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/file_picker/ios"
   Flutter:
     :path: Flutter
+  flutter_local_notifications:
+    :path: ".symlinks/plugins/flutter_local_notifications/ios"
   flutter_native_splash:
     :path: ".symlinks/plugins/flutter_native_splash/ios"
   flutter_secure_storage:
@@ -149,6 +154,7 @@ SPEC CHECKSUMS:
   DKPhotoGallery: b3834fecb755ee09a593d7c9e389d8b5d6deed60
   file_picker: a0560bc09d61de87f12d246fc47d2119e6ef37be
   Flutter: cabc95a1d2626b1b06e7179b784ebcf0c0cde467
+  flutter_local_notifications: a5a732f069baa862e728d839dd2ebb904737effb
   flutter_native_splash: c32d145d68aeda5502d5f543ee38c192065986cf
   flutter_secure_storage: 1ed9476fba7e7a782b22888f956cce43e2c62f13
   flutter_tts: b88dbc8655d3dc961bc4a796e4e16a4cc1795833

ios/Runner/AppDelegate.swift

@@ -122,11 +122,26 @@ class BackgroundStreamingHandler: NSObject {
     }
     
     private func saveStreamStates(_ states: [[String: Any]]) {
-        UserDefaults.standard.set(states, forKey: "ConduitActiveStreams")
+        do {
+            let jsonData = try JSONSerialization.data(withJSONObject: states, options: [])
+            UserDefaults.standard.set(jsonData, forKey: "ConduitActiveStreams")
+        } catch {
+            print("BackgroundStreamingHandler: Failed to serialize stream states: \(error)")
+        }
     }
-    
+
     private func recoverStreamStates() -> [[String: Any]] {
-        return UserDefaults.standard.array(forKey: "ConduitActiveStreams") as? [[String: Any]] ?? []
+        guard let jsonData = UserDefaults.standard.data(forKey: "ConduitActiveStreams") else {
+            return []
+        }
+        do {
+            if let states = try JSONSerialization.jsonObject(with: jsonData, options: []) as? [[String: Any]] {
+                return states
+            }
+        } catch {
+            print("BackgroundStreamingHandler: Failed to deserialize stream states: \(error)")
+        }
+        return []
     }
     
     deinit {