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/@smithy/fetch-http-handler/README.md

@@ -0,0 +1,11 @@
+# @smithy/fetch-http-handler
+
+[![NPM version](https://img.shields.io/npm/v/@smithy/fetch-http-handler/latest.svg)](https://www.npmjs.com/package/@smithy/fetch-http-handler)
+[![NPM downloads](https://img.shields.io/npm/dm/@smithy/fetch-http-handler.svg)](https://www.npmjs.com/package/@smithy/fetch-http-handler)
+
+This is the default `requestHandler` used for browser applications.
+Since Node.js introduced experimental Web Streams API in v16.5.0 and made it stable in v21.0.0,
+you can consider using `fetch-http-handler` in Node.js, although it's not recommended.
+
+For the Node.js default `requestHandler` implementation, see instead
+[`@smithy/node-http-handler`](https://www.npmjs.com/package/@smithy/node-http-handler).