refactor: enhance localization support in chat and voice input features

- Integrated localization for various dialog messages and UI elements in the chat and voice input components.
- Updated the confirmation dialog to utilize localized strings for delete messages, improving user experience across different languages.
- Enhanced voice input sheet to reflect localized text for status updates, action buttons, and prompts, ensuring consistency in user interactions.
- Improved the file attachment widget to display the attachment label in a localized manner, enhancing accessibility for users in different regions.
- Streamlined localization management by centralizing string retrieval, promoting maintainability and clarity in the codebase.

lib/l10n/app_localizations_it.dart

@@ -402,12 +402,45 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get addAttachment => 'Aggiungi allegato';
 
+  @override
+  String get attachmentLabel => 'Allegato';
+
   @override
   String get tools => 'Strumenti';
 
   @override
   String get voiceInput => 'Input vocale';
 
+  @override
+  String get voice => 'Voce';
+
+  @override
+  String get voiceStatusListening => 'In ascolto…';
+
+  @override
+  String get voiceStatusRecording => 'Registrazione…';
+
+  @override
+  String get voiceHoldToTalk => 'Tieni premuto per parlare';
+
+  @override
+  String get voiceAutoSend => 'Invio automatico';
+
+  @override
+  String get voiceTranscript => 'Trascrizione';
+
+  @override
+  String get voicePromptSpeakNow => 'Parla ora…';
+
+  @override
+  String get voicePromptTapStart => 'Tocca \"Avvia\" per iniziare';
+
+  @override
+  String get voiceActionStop => 'Stop';
+
+  @override
+  String get voiceActionStart => 'Avvia';
+
   @override
   String get messageInputLabel => 'Input messaggio';
 
@@ -423,6 +456,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get send => 'Invia';
 
+  @override
+  String get codeCopiedToClipboard => 'Codice copiato negli appunti.';
+
   @override
   String get sendMessage => 'Invia messaggio';
 
@@ -826,6 +862,16 @@ class AppLocalizationsIt extends AppLocalizations {
   String get quickActionsDescription =>
       'Scegli fino a due scorciatoie da fissare vicino al campo di input';
 
+  @override
+  String get chatSettings => 'Chat';
+
+  @override
+  String get sendOnEnter => 'Invia con Invio';
+
+  @override
+  String get sendOnEnterDescription =>
+      'Invio invia (tastiera software). Cmd/Ctrl+Invio disponibile';
+
   @override
   String get display => 'Schermo';