* 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
* Revert "json post base path bug fixed (#2647)"
This reverts commit 04cf250a547bb64265d256e7d15af7cea5ecfa67.
* Revert "Group Management of Subscription Clients"
* Revert "fix getSubGroupClients for enable/disable and edit clients."
* Revert "Enhance database initialization in db.go (#2645)"
This reverts commit 66fe84181b9c4e2f6c6be943a7f486b4308c32ff.
* Revert "Add checkpoint handling in CloseDB function (#2646)"
This reverts commit 4dd40f6f192e3f94f2ea4fe9e942e6663b5a1527.
* Revert "Improved database model migration and added indexing (#2655)"
This reverts commit b922d986d6783ce28d00ca948024dee44a11f29e.
