* Fix: Graceful Telegram bot shutdown to prevent 409 Conflict
Introduces a `botCancel` context and a global `StopBot()` function to ensure the Telegram bot's Long Polling operation is safely terminated (via context cancellation) before the service restarts. This prevents the "Conflict: another update consumer is running" (409) error upon panel restart.
Changes:
- Added `botCancel context.CancelFunc` to manage context cancellation.
- Implemented global `StopBot()` function.
- Updated `Tgbot.Stop()` to call `StopBot()`.
- Modified `Tgbot.OnReceive()` to use the new cancellable context for `UpdatesViaLongPolling`.
* Fix: Prevent race condition and goroutine leak in TgBot
Addresses a critical race condition on the global `botCancel` variable, which could occur if `Tgbot.OnReceive()` was called concurrently (e.g., during rapid panel restarts or unexpected behavior).
Changes in tgbot.go:
- Added `tgBotMutex sync.Mutex` to ensure thread safety.
- Protected `botCancel` creation and assignment in `OnReceive()` using the mutex, and added a check to prevent overwriting an active context, which avoids goroutine leaks.
- Protected the cancellation and cleanup logic in `StopBot()` with the mutex.
* Refactor: Replace time.Sleep with sync.WaitGroup for reliable TgBot shutdown
Replaced the unreliable `time.Sleep(1 * time.Second)` in `service.StopBot()` with `sync.WaitGroup`. This ensures the Long Polling goroutine is explicitly waited for and reliably exits before the panel continues, preventing potential resource leaks and incomplete shutdowns during restarts.
Changes:
- Added `botWG sync.WaitGroup` variable.
- Updated `service.StopBot()` to call `botWG.Wait()` instead of `time.Sleep()`.
- Modified `Tgbot.OnReceive()` to correctly use `botWG.Add(1)` and `defer botWG.Done()` within the Long Polling goroutine.
- Corrected the goroutine structure in `OnReceive()` to properly encapsulate all message handling logic.
* 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
