* feat: persist client last online and expose API
* feat(ui): show client last online in table and info modal
* i18n: add “Last Online” across locales
* chore: format timestamps as HH:mm:ss
* feat(db): add allTime field to Inbound and ClientTraffic models
* feat(inbound): increment all_time for inbounds and clients on traffic updates
calculate correct all_time traffic on migrate command
* feat(ui): show all-time traffic column for inbounds and its clients
* i18n: add pages.inbounds.allTimeTraffic label across locales
* Add All Time Traffic Usage in inbounds page top banner
* feat(backend): add created_at/updated_at to clients and maintain on create/update
backfill existing clients and set updated_at on mutations
* feat(frontend): carry created_at/updated_at in client models and round-trip via JSON
* feat(frontend): display Created and Updated columns in client table with proper date formatting
* i18n: add pages.inbounds.createdAt/updatedAt across all locales
* Update inbound.go
Remove duplicate code
* chore: revert "fix: reduced login title font-size for mobile (#3105)"
* chore: short login title translation for russian
* chore: change login title translation for ukrainian
* chore: implement 2fa auth
from #2786
* chore: format code
* chore: replace two factor token input with qr-code
* chore: requesting confirmation of setting/removing two-factor authentication
otpauth library was taken from cdnjs
* chore: revert changes in `ClipboardManager`
don't need it.
* chore: removing twoFactor prop in settings page
* chore: remove `twoFactorQr` object in `mounted` function
