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/jsonwebtoken/index.js

@@ -0,0 +1,8 @@
+module.exports = {
+  decode: require('./decode'),
+  verify: require('./verify'),
+  sign: require('./sign'),
+  JsonWebTokenError: require('./lib/JsonWebTokenError'),
+  NotBeforeError: require('./lib/NotBeforeError'),
+  TokenExpiredError: require('./lib/TokenExpiredError'),
+};