fix: 修复配额说明重复和undefined问题

- 在editStorageForm中初始化oss_storage_quota_value和oss_quota_unit
- 删除重复的旧配额说明块，保留新的当前配额设置显示

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/node_modules/validator/lib/isByteLength.js

@@ -0,0 +1,27 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isByteLength;
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
+/* eslint-disable prefer-rest-params */
+function isByteLength(str, options) {
+  (0, _assertString.default)(str);
+  var min;
+  var max;
+  if (_typeof(options) === 'object') {
+    min = options.min || 0;
+    max = options.max;
+  } else {
+    // backwards compatibility: isByteLength(str, min [, max])
+    min = arguments[1];
+    max = arguments[2];
+  }
+  var len = encodeURI(str).split(/%..|./).length - 1;
+  return len >= min && (typeof max === 'undefined' || len <= max);
+}
+module.exports = exports.default;
+module.exports.default = exports.default;