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/isBase58.js

@@ -0,0 +1,11 @@
+import assertString from './util/assertString';
+
+// Accepted chars - 123456789ABCDEFGH JKLMN PQRSTUVWXYZabcdefghijk mnopqrstuvwxyz
+var base58Reg = /^[A-HJ-NP-Za-km-z1-9]*$/;
+export default function isBase58(str) {
+  assertString(str);
+  if (base58Reg.test(str)) {
+    return true;
+  }
+  return false;
+}