Description

Localization fallback improvements:

• Theloc getter in theLocalizationsExt extension now falls back to the default English localization (FlutterQuillLocalizationsEn) if no delegate is registered, instead of throwing aMissingFlutterQuillLocalizationException.
• TheMissingFlutterQuillLocalizationException class is now marked as deprecated, as it will be removed in a future release.

Test updates:

• Tests ineditor_test.dart were updated to verify that no exception is thrown when the localization delegate is missing, and that English fallback messages are used.[1][2]
• Tests now check that the provided localization delegate is used when available (e.g., Spanish), and that fallback localization provides correct interpolated messages when the delegate is missing.

Related Issues

• RelatedFallback to en_US when FlutterQuillLocalizations.delegate is not provided #2609Fallback to en_US when FlutterQuillLocalizations.delegate is not provided #2609

Type of Change

• ✨Feature: New functionality without breaking existing features.
• 🛠️Bug fix: Resolves an issue without altering current behavior.
• 🧹Refactor: Code reorganization, no behavior change.
• ❌Breaking: Alters existing functionality and requires updates.
• 🧪Tests: New or modified tests
• 📝Documentation: Updates or additions to documentation.
• 🗑️Chore: Routine tasks, or maintenance.
• ✅Build configuration change: Build/configuration changes.