fix dead code, typo, and minor bugs in main.go, process.go and index.go (#6167)

Fixes several small issues found during code review:
- fix(xray): return explicit nil instead of stale err in getLogPath
- fix(xray): remove duplicate doc comment on GetErrorLogPath
- refactor: remove unreachable return after log.Fatalf (×4)
- fix(cli): add missing newline to listen IP success message
- fix(cli): typo "form" → "from" in migrate help text
- refactor: simplify var+assign to short declaration for server/subServer
- fix(controller): return error from getTwoFactorEnable instead of swallowing it

internal/web/controller/index.go

@@ -163,7 +163,5 @@ func (a *IndexController) csrfToken(c *gin.Context) {
 // getTwoFactorEnable retrieves the current status of two-factor authentication.
 func (a *IndexController) getTwoFactorEnable(c *gin.Context) {
 	status, err := a.settingService.GetTwoFactorEnable()
-	if err == nil {
-		jsonObj(c, status, nil)
-	}
+	jsonObj(c, status, err)
 }

internal/xray/process.go

@@ -85,7 +85,7 @@ func getLogPath(key string) (string, error) {
 			return logPath, nil
 		}
 	}
-	return "", err
+	return "", nil
 }
 
 // GetAccessLogPath reads the Xray config and returns the access log file path.
@@ -93,7 +93,6 @@ func GetAccessLogPath() (string, error) {
 	return getLogPath("access")
 }
 
-// GetErrorLogPath reads the Xray config and returns the error log file path.
 // GetErrorLogPath reads the Xray config and returns the error log file path.
 func GetErrorLogPath() (string, error) {
 	return getLogPath("error")

main.go

@@ -71,24 +71,20 @@ func runWebServer() {
 		log.Fatalf("Error initializing database: %v", err)
 	}
 
-	var server *web.Server
-	server = web.NewServer()
+	server := web.NewServer()
 	global.SetWebServer(server)
 	err = server.Start()
 	if err != nil {
 		log.Fatalf("Error starting web server: %v", err)
-		return
 	}
 
-	var subServer *sub.Server
 	sub.SetDistFS(web.EmbeddedDist())
 	service.RegisterSubLinkProvider(sub.NewLinkProvider())
-	subServer = sub.NewServer()
+	subServer := sub.NewServer()
 	global.SetSubServer(subServer)
 	err = subServer.Start()
 	if err != nil {
 		log.Fatalf("Error starting sub server: %v", err)
-		return
 	}
 
 	sigCh := make(chan os.Signal, 8)
@@ -142,7 +138,6 @@ func runWebServer() {
 			err = server.StartPanelOnly()
 			if err != nil {
 				log.Fatalf("Error restarting web server: %v", err)
-				return
 			}
 			log.Println("Web server restarted successfully.")
 
@@ -152,7 +147,6 @@ func runWebServer() {
 			err = subServer.Start()
 			if err != nil {
 				log.Fatalf("Error restarting sub server: %v", err)
-				return
 			}
 			log.Println("Sub server restarted successfully.")
 		case sys.SIGUSR1:
@@ -360,7 +354,7 @@ func updateSetting(port int, username string, password string, webBasePath strin
 		if err != nil {
 			fmt.Println("Failed to set listen IP:", err)
 		} else {
-			fmt.Printf("listen %v set successfully", listenIP)
+			fmt.Printf("listen %v set successfully\n", listenIP)
 		}
 	}
 
@@ -579,7 +573,7 @@ func main() {
 		fmt.Println()
 		fmt.Println("Commands:")
 		fmt.Println("    run            run web panel")
-		fmt.Println("    migrate        migrate form other/old x-ui")
+		fmt.Println("    migrate        migrate from other/old x-ui")
 		fmt.Println("    migrate-db     SQLite <-> .dump (--dump/--restore) or copy into PostgreSQL (--dsn)")
 		fmt.Println("    setting        set settings")
 	}