TF-3671 Fix all composer interaction are blocked without network (#3682)

lib/main/utils/app_config.dart

@@ -7,10 +7,13 @@ import 'package:tmail_ui_user/features/login/data/network/config/oidc_constant.d
 import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
 
 class AppConfig {
+  const AppConfig._();
+
   static const int defaultMinInputLengthAutocomplete = 3;
   static const int warningAttachmentFileSizeInMegabytes = 10;
   static const int defaultLimitAutocomplete = 8;
 
+  static const String envFileName = 'env.file';
   static const String appDashboardConfigurationPath = "configurations/app_dashboard.json";
   static const String appFCMConfigurationPath = "configurations/env.fcm";
   static const String iOSKeychainSharingGroupId = 'KUT463DS29.com.linagora.ios.teammail.shared';

lib/main/utils/app_utils.dart

@@ -11,17 +11,16 @@ import 'package:tmail_ui_user/main/utils/app_config.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 class AppUtils {
-
-  static const String envFileName = 'env.file';
+  const AppUtils._();
 
   static Future<void> loadEnvFile() async {
-    await dotenv.load(fileName: envFileName);
+    await dotenv.load(fileName: AppConfig.envFileName);
     final mapEnvData = Map<String, String>.from(dotenv.env);
    try {
-     await AppUtils.loadFcmConfigFileToEnv(currentMapEnvData: mapEnvData);
+     await loadFcmConfigFileToEnv(currentMapEnvData: mapEnvData);
    } catch (e) {
      logError('AppUtils::loadEnvFile:loadFcmConfigFileToEnv: Exception = $e');
-     await dotenv.load(fileName: envFileName);
+     await dotenv.load(fileName: AppConfig.envFileName);
    }
   }
 

lib/main/utils/asset_preloader.dart

@@ -0,0 +1,23 @@
+
+import 'package:core/utils/app_logger.dart';
+import 'package:html_editor_enhanced/utils/html_editor_constants.dart';
+import 'package:html_editor_enhanced/utils/html_editor_utils.dart';
+
+class AssetPreloader {
+  const AssetPreloader._();
+
+  static Future<void> preloadHtmlEditorAssets() async {
+    try {
+      await Future.wait([
+        HtmlEditorUtils.loadAsset(HtmlEditorConstants.summernoteHtmlAssetPath),
+        HtmlEditorUtils.loadAsset(HtmlEditorConstants.jqueryAssetPath),
+        HtmlEditorUtils.loadAsset(HtmlEditorConstants.summernoteCSSAssetPath),
+        HtmlEditorUtils.loadAsset(HtmlEditorConstants.summernoteJSAssetPath),
+        HtmlEditorUtils.loadAsset(HtmlEditorConstants.summernoteFontEOTAssetPath),
+        HtmlEditorUtils.loadAsset(HtmlEditorConstants.summernoteFontTTFAssetPath),
+      ]);
+    } catch (e) {
+      logError('AssetPreloader::preloadHtmlEditorAssets:Exception = $e');
+    }
+  }
+}