feat: Handle errors, validate model names, and calculate quota usage (#978)

- Improved error handling in various modules for better stability and responsiveness.
- Optimized code in several files for improved efficiency and readability.
- Enhanced user experience by providing more detailed error responses in the controller.
- Strengthened security by ignoring sensitive files in `.gitignore`.

common/embed-file-system.go

@@ -15,10 +15,7 @@ type embedFileSystem struct {
 
 func (e embedFileSystem) Exists(prefix string, path string) bool {
 	_, err := e.Open(path)
-	if err != nil {
-		return false
-	}
-	return true
+	return err == nil
 }
 
 func EmbedFolder(fsEmbed embed.FS, targetPath string) static.ServeFileSystem {

common/helper/helper.go

@@ -107,13 +107,13 @@ func Seconds2Time(num int) (time string) {
 }
 
 func Interface2String(inter interface{}) string {
-	switch inter.(type) {
+	switch inter := inter.(type) {
 	case string:
-		return inter.(string)
+		return inter
 	case int:
-		return fmt.Sprintf("%d", inter.(int))
+		return fmt.Sprintf("%d", inter)
 	case float64:
-		return fmt.Sprintf("%f", inter.(float64))
+		return fmt.Sprintf("%f", inter)
 	}
 	return "Not Implemented"
 }

common/logger/logger.go

@@ -68,15 +68,15 @@ func Error(ctx context.Context, msg string) {
 }
 
 func Infof(ctx context.Context, format string, a ...any) {
-	Info(ctx, fmt.Sprintf(format, a))
+	Info(ctx, fmt.Sprintf(format, a...))
 }
 
 func Warnf(ctx context.Context, format string, a ...any) {
-	Warn(ctx, fmt.Sprintf(format, a))
+	Warn(ctx, fmt.Sprintf(format, a...))
 }
 
 func Errorf(ctx context.Context, format string, a ...any) {
-	Error(ctx, fmt.Sprintf(format, a))
+	Error(ctx, fmt.Sprintf(format, a...))
 }
 
 func logHelper(ctx context.Context, level string, msg string) {