Fix tea login add with ssh public key bug (#789)

Fix #705

Reviewed-on: https://gitea.com/gitea/tea/pulls/789
Reviewed-by: techknowlogick <techknowlogick@noreply.gitea.com>

modules/interact/login.go

@@ -168,7 +168,12 @@ func CreateLogin() error {
 		printTitleAndContent("SSH Key/Certificate Path (leave empty for auto-discovery in ~/.ssh and ssh-agent):", sshKey)
 
 		if sshKey == "" {
-			sshKey, err = promptSelect("Select ssh-key: ", task.ListSSHPubkey(), "", "", "")
+			pubKeys := task.ListSSHPubkey()
+			if len(pubKeys) == 0 {
+				fmt.Println("No SSH keys found in ~/.ssh or ssh-agent")
+				return nil
+			}
+			sshKey, err = promptSelect("Select ssh-key: ", pubKeys, "", "", "")
 			if err != nil {
 				return err
 			}

modules/interact/prompts.go

@@ -5,6 +5,7 @@ package interact
 
 import (
 	"fmt"
+	"slices"
 	"strings"
 	"time"
 
@@ -125,7 +126,9 @@ func promptSelect(prompt string, options []string, customVal, noneVal, defaultVa
 	if defaultVal == "" && noneVal != "" {
 		defaultVal = noneVal
 	}
-
+	if len(options) > 0 && !slices.Contains(options, defaultVal) {
+		defaultVal = options[0]
+	}
 	selection = defaultVal
 	if err := huh.NewSelect[string]().
 		Title(prompt).