feat: interactive password input for pass_mgr admin init

- Remove --key-path parameter requirement
- Add interactive password prompt (hidden input like sudo)
- Require password confirmation
- Password must be at least 6 characters
- Uses golang.org/x/term for secure password input

pass_mgr/src/main.go

@@ -12,9 +12,11 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"syscall"
 	"time"
 
 	"github.com/spf13/cobra"
+	"golang.org/x/term"
 )
 
 const (
@@ -173,27 +175,17 @@ func rotateCmd() *cobra.Command {
 }
 
 func adminInitCmd() *cobra.Command {
-	var keyPath string
-	cmd := &cobra.Command{
+	return &cobra.Command{
 		Use:   "admin init",
 		Short: "Initialize pass_mgr with admin key",
 		Run: func(cmd *cobra.Command, args []string) {
-			// Require --key-path parameter
-			if keyPath == "" {
-				fmt.Fprintln(os.Stderr, "Error: --key-path is required")
-				fmt.Fprintln(os.Stderr, "Usage: pass_mgr admin init --key-path <path-to-key-file>")
-				fmt.Fprintln(os.Stderr, "The key file must contain a password with at least 6 characters")
-				os.Exit(1)
-			}
-			if err := initAdmin(keyPath); err != nil {
+			if err := initAdminInteractive(); err != nil {
 				fmt.Fprintf(os.Stderr, "Error: %v\n", err)
 				os.Exit(1)
 			}
 			fmt.Println("pass_mgr initialized successfully")
 		},
 	}
-	cmd.Flags().StringVar(&keyPath, "key-path", "", "Path to admin key file (required, password must be >= 6 chars)")
-	return cmd
 }
 
 func setCmd() *cobra.Command {
@@ -256,32 +248,56 @@ func loadAdminKey() ([]byte, error) {
 	return hash[:], nil
 }
 
-func initAdmin(keyPath string) error {
+func initAdminInteractive() error {
+	fmt.Print("Enter admin password: ")
+	password1, err := term.ReadPassword(int(syscall.Stdin))
+	if err != nil {
+		return fmt.Errorf("failed to read password: %w", err)
+	}
+	fmt.Println()
+
+	// Trim whitespace/newlines
+	password1 = []byte(strings.TrimSpace(string(password1)))
+
+	// Validate password length
+	if len(password1) < 6 {
+		return fmt.Errorf("password must be at least 6 characters long (got %d)", len(password1))
+	}
+
+	fmt.Print("Confirm admin password: ")
+	password2, err := term.ReadPassword(int(syscall.Stdin))
+	if err != nil {
+		return fmt.Errorf("failed to read password confirmation: %w", err)
+	}
+	fmt.Println()
+
+	// Trim whitespace/newlines
+	password2 = []byte(strings.TrimSpace(string(password2)))
+
+	// Check passwords match
+	if string(password1) != string(password2) {
+		return fmt.Errorf("passwords do not match")
+	}
+
+	// Save the key
+	return saveAdminKey(password1)
+}
+
+func saveAdminKey(key []byte) error {
 	homeDir := getHomeDir()
 	adminDir := filepath.Join(homeDir, AdminKeyDir)
-	
+
 	// Create admin directory
 	if err := os.MkdirAll(adminDir, 0700); err != nil {
 		return fmt.Errorf("failed to create admin directory: %w", err)
 	}
-	
-	// Read provided key
-	key, err := os.ReadFile(keyPath)
-	if err != nil {
-		return fmt.Errorf("failed to read key file: %w", err)
-	}
-	
-	// Validate password length (must be >= 6 characters)
-	if len(key) < 6 {
-		return fmt.Errorf("password must be at least 6 characters long (got %d)", len(key))
-	}
-	
+
 	// Save key
 	keyFile := filepath.Join(adminDir, AdminKeyFile)
 	if err := os.WriteFile(keyFile, key, 0600); err != nil {
 		return fmt.Errorf("failed to save key: %w", err)
 	}
-	
+
 	// Save config
 	config := Config{
 		KeyHash:   fmt.Sprintf("%x", sha256.Sum256(key)),
@@ -292,10 +308,25 @@ func initAdmin(keyPath string) error {
 	if err := os.WriteFile(configPath, configData, 0600); err != nil {
 		return fmt.Errorf("failed to save config: %w", err)
 	}
-	
+
 	return nil
 }
 
+func initAdmin(keyPath string) error {
+	// Read provided key
+	key, err := os.ReadFile(keyPath)
+	if err != nil {
+		return fmt.Errorf("failed to read key file: %w", err)
+	}
+
+	// Validate password length (must be >= 6 characters)
+	if len(key) < 6 {
+		return fmt.Errorf("password must be at least 6 characters long (got %d)", len(key))
+	}
+
+	return saveAdminKey(key)
+}
+
 func getSecretsDir() string {
 	if workspaceDir != "" && agentID != "" {
 		return filepath.Join(workspaceDir, SecretsDirName, agentID)