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/express-validator/lib/chain/index.d.ts

@@ -0,0 +1,9 @@
+export * from './sanitizers';
+export * from './sanitizers-impl';
+export * from './context-handler';
+export * from './context-handler-impl';
+export * from './context-runner';
+export * from './context-runner-impl';
+export * from './validators';
+export * from './validators-impl';
+export * from './validation-chain';