Fix: Invoke service.StopBot() in signal handlers (#3583)

Ensures the global Telegram bot stop function (`service.StopBot()`) is called upon receiving system signals (SIGHUP for restart, SIGINT/SIGTERM for shutdown). This complements the changes in `tgbot.go` to guarantee a clean shutdown of the Telegram bot's Long Polling operation, fully resolving the 409 Conflict issue during panel restarts or shutdowns.

Changes:
- Added `service.StopBot()` call to the `syscall.SIGHUP` handler.
- Added `service.StopBot()` call to the default shutdown handler.

main.go

@@ -78,6 +78,10 @@ func runWebServer() {
 		case syscall.SIGHUP:
 			logger.Info("Received SIGHUP signal. Restarting servers...")
 
+			// --- FIX FOR TELEGRAM BOT CONFLICT (409): Stop bot before restart ---
+			service.StopBot()
+			// --			
+			
 			err := server.Stop()
 			if err != nil {
 				logger.Debug("Error stopping web server:", err)
@@ -106,6 +110,10 @@ func runWebServer() {
 			log.Println("Sub server restarted successfully.")
 
 		default:
+			// --- FIX FOR TELEGRAM BOT CONFLICT (409) on full shutdown ---
+			service.StopBot()
+			// ------------------------------------------------------------
+			
 			server.Stop()
 			subServer.Stop()
 			log.Println("Shutting down servers.")