Refactor UI code for better readability and consistency

- Improved formatting of ListTile icons and text styles in settings_screen.dart, telemetry_screen.dart, usb_screen.dart, gif_picker.dart, path_editor_sheet.dart, repeater_login_dialog.dart, and room_login_dialog.dart for better readability.
- Consolidated TextStyle definitions into single lines where applicable.
- Updated notification_service.dart to enhance readability of notification ID assignment.
- Simplified function signatures in routing_sheet.dart for clarity.
- Cleaned up test assertions in usb_flow_test.dart for conciseness.
- Removed unused translations in untranslated.json to streamline localization files.

lib/screens/repeater_settings_screen.dart

@@ -459,7 +459,9 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
               ? l10n.repeater_refreshed(label)
               : l10n.repeater_errorRefreshing(label),
         ),
-        backgroundColor: successCount > 0 ? null : Theme.of(context).colorScheme.error,
+        backgroundColor: successCount > 0
+            ? null
+            : Theme.of(context).colorScheme.error,
       );
       setState(() => setRefreshing(false));
     }
@@ -2229,7 +2231,9 @@ class _RepeaterSettingsScreenState extends State<RepeaterSettingsScreen> {
               onConfirm();
             },
             style: isDestructive
-                ? FilledButton.styleFrom(backgroundColor: Theme.of(context).colorScheme.error)
+                ? FilledButton.styleFrom(
+                    backgroundColor: Theme.of(context).colorScheme.error,
+                  )
                 : null,
             child: Text(l10n.repeater_confirm),
           ),