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/rtrim.js

@@ -0,0 +1,24 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = rtrim;
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function rtrim(str, chars) {
+  (0, _assertString.default)(str);
+  if (chars) {
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#Escaping
+    var pattern = new RegExp("[".concat(chars.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), "]+$"), 'g');
+    return str.replace(pattern, '');
+  }
+  // Use a faster and more safe than regex trim method https://blog.stevenlevithan.com/archives/faster-trim-javascript
+  var strIndex = str.length - 1;
+  while (/\s/.test(str.charAt(strIndex))) {
+    strIndex -= 1;
+  }
+  return str.slice(0, strIndex + 1);
+}
+module.exports = exports.default;
+module.exports.default = exports.default;