cli cleanup: merge login into config subcommands and remove top-level login command

cmd/clawgo/cli_common.go

@@ -94,7 +94,6 @@ func printHelp() {
 	fmt.Println("  status      Show clawgo status")
 	fmt.Println("  config      Get/set config values")
 	fmt.Println("  cron        Manage scheduled tasks")
-	fmt.Println("  login       Configure CLIProxyAPI upstream")
 	fmt.Println("  channel     Test and manage messaging channels")
 	fmt.Println("  skills      Manage skills (install, list, remove)")
 	fmt.Println("  uninstall   Uninstall clawgo components")

cmd/clawgo/cmd_config.go

@@ -25,6 +25,8 @@ func configCmd() {
 		configCheckCmd()
 	case "reload":
 		configReloadCmd()
+	case "login":
+		configLoginCmd()
 	default:
 		fmt.Printf("Unknown config command: %s\n", os.Args[2])
 		configHelp()

cmd/clawgo/cmd_login.go

@@ -9,7 +9,7 @@ import (
 	"clawgo/pkg/config"
 )
 
-func loginCmd() {
+func configLoginCmd() {
 	cfg, err := loadConfig()
 	if err != nil {
 		fmt.Printf("Error loading config: %v\n", err)
@@ -38,6 +38,3 @@ func loginCmd() {
 	fmt.Println("✓ CLIProxyAPI configuration saved.")
 }
 
-func configureProvider(cfg *config.Config, provider string) {
-	// Deprecated: Migrated to CLIProxyAPI logic in loginCmd
-}

cmd/clawgo/main.go

@@ -62,8 +62,6 @@ func main() {
 		configCmd()
 	case "cron":
 		cronCmd()
-	case "login":
-		loginCmd()
 	case "channel":
 		channelCmd()
 	case "skills":