feat: bff resp string to json

bff/internal/response/middleware.go

@@ -50,10 +50,29 @@ func Wrap(next http.HandlerFunc) http.HandlerFunc {
 				return
 			}
 		}
-		ctrl.OutPut(w, data.Code, data.Data, data.Msg)
+		ctrl.OutPut(w, data.Code, unwrapJSONData(data.Data), data.Msg)
 	}
 }
 
+func unwrapJSONData(v any) any {
+	s, ok := v.(string)
+	if !ok {
+		return v
+	}
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return nil
+	}
+	if s[0] != '{' && s[0] != '[' {
+		return v
+	}
+	var parsed any
+	if err := json.Unmarshal([]byte(s), &parsed); err != nil {
+		return v
+	}
+	return parsed
+}
+
 func mapHTTPError(httpStatus int, body string) Error {
 	msg := strings.TrimSpace(body)
 	msg = strings.TrimPrefix(msg, "rpc error: ")