feat/auth-hook: add post auth hook

internal/auth/gemini/gemini_token.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"
+	log "github.com/sirupsen/logrus"
 )
 
 // GeminiTokenStorage stores OAuth2 token information for Google Gemini API authentication.
@@ -57,35 +58,31 @@ func (ts *GeminiTokenStorage) SetMetadata(meta map[string]any) {
 //   - error: An error if the operation fails, nil otherwise
 func (ts *GeminiTokenStorage) SaveTokenToFile(authFilePath string) error {
 	misc.LogSavingCredentials(authFilePath)
-	ts.Type = "gemini" // Ensure type is set before merging/saving
-
+	ts.Type = "gemini"
 	// Merge metadata using helper
 	data, errMerge := misc.MergeMetadata(ts, ts.Metadata)
 	if errMerge != nil {
 		return fmt.Errorf("failed to merge metadata: %w", errMerge)
 	}
-
-	// Create parent directory
 	if err := os.MkdirAll(filepath.Dir(authFilePath), os.ModePerm); err != nil {
-		return fmt.Errorf("failed to create directory: %w", err)
+		return fmt.Errorf("failed to create directory: %v", err)
 	}
 
-	// Create file
 	f, err := os.Create(authFilePath)
 	if err != nil {
-		return fmt.Errorf("failed to create file: %w", err)
+		return fmt.Errorf("failed to create token file: %w", err)
 	}
 	defer func() {
-		_ = f.Close()
+		if errClose := f.Close(); errClose != nil {
+			log.Errorf("failed to close file: %v", errClose)
+		}
 	}()
 
-	// Write to file
 	enc := json.NewEncoder(f)
 	enc.SetIndent("", "  ")
 	if err := enc.Encode(data); err != nil {
 		return fmt.Errorf("failed to encode token to file: %w", err)
 	}
-
 	return nil
 }