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/isAfter.js

@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isAfter;
+var _toDate = _interopRequireDefault(require("./toDate"));
+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); }
+function isAfter(date, options) {
+  // For backwards compatibility:
+  // isAfter(str [, date]), i.e. `options` could be used as argument for the legacy `date`
+  var comparisonDate = (_typeof(options) === 'object' ? options.comparisonDate : options) || Date().toString();
+  var comparison = (0, _toDate.default)(comparisonDate);
+  var original = (0, _toDate.default)(date);
+  return !!(original && comparison && original > comparison);
+}
+module.exports = exports.default;
+module.exports.default = exports.default;