feat: add API token to install output (#4322)

* feat: add API token to install output

Add -getApiToken flag to the setting subcommand so shell scripts
can retrieve the panel API token. Include the token in the
install.sh completion banner for automation/deployment use.

* fix(install): adapt -getApiToken CLI to multi-token service

settingService.GetApiToken was removed when API tokens moved to a
multi-row ApiTokenService. Switch the install-time CLI to list tokens
and create one named "install" if none exist, preserving the
`apiToken: <value>` output the install.sh grep depends on.

---------

Co-authored-by: Sanaei <ho3ein.sanaei@gmail.com>

main.go

@@ -391,6 +391,28 @@ func GetListenIP(getListen bool) {
 	}
 }
 
+func GetApiToken(getApiToken bool) {
+	if !getApiToken {
+		return
+	}
+	apiTokenService := service.ApiTokenService{}
+	tokens, err := apiTokenService.List()
+	if err != nil {
+		fmt.Println("get apiToken failed, error info:", err)
+		return
+	}
+	if len(tokens) > 0 {
+		fmt.Println("apiToken:", tokens[0].Token)
+		return
+	}
+	created, err := apiTokenService.Create("install")
+	if err != nil {
+		fmt.Println("create apiToken failed, error info:", err)
+		return
+	}
+	fmt.Println("apiToken:", created.Token)
+}
+
 // migrateDb performs database migration operations for the 3x-ui panel.
 func migrateDb() {
 	inboundService := service.InboundService{}
@@ -433,6 +455,7 @@ func main() {
 	var reset bool
 	var show bool
 	var getCert bool
+	var getApiToken bool
 	var resetTwoFactor bool
 	settingCmd.BoolVar(&reset, "reset", false, "Reset all settings")
 	settingCmd.BoolVar(&show, "show", false, "Display current settings")
@@ -444,6 +467,7 @@ func main() {
 	settingCmd.BoolVar(&resetTwoFactor, "resetTwoFactor", false, "Reset two-factor authentication settings")
 	settingCmd.BoolVar(&getListen, "getListen", false, "Display current panel listenIP IP")
 	settingCmd.BoolVar(&getCert, "getCert", false, "Display current certificate settings")
+	settingCmd.BoolVar(&getApiToken, "getApiToken", false, "Display current API token")
 	settingCmd.StringVar(&webCertFile, "webCert", "", "Set path to public key file for panel")
 	settingCmd.StringVar(&webKeyFile, "webCertKey", "", "Set path to private key file for panel")
 	settingCmd.StringVar(&tgbottoken, "tgbottoken", "", "Set token for Telegram bot")
@@ -501,6 +525,9 @@ func main() {
 		if getCert {
 			GetCertificate(getCert)
 		}
+		if getApiToken {
+			GetApiToken(getApiToken)
+		}
 		if (tgbottoken != "") || (tgbotchatid != "") || (tgbotRuntime != "") {
 			updateTgbotSetting(tgbottoken, tgbotchatid, tgbotRuntime)
 		}