refactored data providers with centralized cache resolution, unified UI using custom dialogs and bottom sheets, and enhanced network error handling for Dio and TLS errors

lib/utils/clipboard_helper.dart

@@ -1,8 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
-/// Copies [text] to the system clipboard and shows a SnackBar confirmation.
-/// Safe to await: respects context lifecycle via the provided [context].
+/// Copies [text] to the system clipboard and shows a SnackBar.
 Future<void> copyToClipboard(
   BuildContext context,
   String text, {