- Prevent activity recreate during language changes via configChanges
- Add onConfigurationChanged() handler in ComposeSettingsActivity
- Simplify setAppLanguage() - let system handle locale change smoothly
- Update language_info strings to reflect smooth transition
- Remove unused Activity parameter and imports
Fixes flicker during language switching by handling configuration
changes instead of recreating the entire activity. Compose recomposes
automatically when locale changes, providing seamless UX.
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