feat: extract connect logic to store, add ACL autocomplete, and clean up i18n fallbacks}
- Extract connect() from Layout into main-command store for React and Vue - Add autocomplete with grouped options (categories, commands) to ACL user dialog chips for commands, keys, and channels across Angular, React, and Vue - Remove hardcoded English fallback strings (|| 'fallback') throughout all three frontends, relying on i18n strings exclusively - Add new i18n keys: socketDisconnected, socketError, deletedHashKey, deletedSetMember, deletedListElement, deletedZSetMember, deletedStreamTimestamp, aclAuthHint, ACL group labels (groupCommon, groupDataTypes, groupOperations) - Update all 40+ language translation files with new string entries - Bump version to 2026.4.439 - Update @vitejs/plugin-vue to ^6.0.6