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/es/lib/isJWT.js

@@ -0,0 +1,15 @@
+import assertString from './util/assertString';
+import isBase64 from './isBase64';
+export default function isJWT(str) {
+  assertString(str);
+  var dotSplit = str.split('.');
+  var len = dotSplit.length;
+  if (len !== 3) {
+    return false;
+  }
+  return dotSplit.reduce(function (acc, currElem) {
+    return acc && isBase64(currElem, {
+      urlSafe: true
+    });
+  }, true);
+}