feat: implement self-signed certificate support in API and UI

- Added support for self-signed TLS certificates in the ApiService, allowing configuration based on server settings.
- Introduced a toggle in the ServerConnectionPage to enable or disable trusting self-signed certificates.
- Updated localization files to include new strings for self-signed certificate settings in multiple languages.
- Enhanced the OptimizedStorageService to manage trusted servers based on user preferences for self-signed certificates.
- Improved error handling and logging throughout the affected services to ensure clarity and maintainability.

lib/features/chat/views/voice_call_page.dart

@@ -148,9 +148,8 @@ class _VoiceCallPageState extends ConsumerState<VoiceCallPage>
           icon: const Icon(CupertinoIcons.xmark),
           onPressed: () async {
             await _service?.stopCall();
-            if (mounted) {
-              Navigator.of(context).pop();
-            }
+            if (!context.mounted) return;
+            Navigator.of(context).pop();
           },
         ),
       ),