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/@aws-sdk/middleware-flexible-checksums/dist-es/index.js

@@ -0,0 +1,6 @@
+export * from "./NODE_REQUEST_CHECKSUM_CALCULATION_CONFIG_OPTIONS";
+export * from "./NODE_RESPONSE_CHECKSUM_VALIDATION_CONFIG_OPTIONS";
+export * from "./constants";
+export * from "./flexibleChecksumsMiddleware";
+export * from "./getFlexibleChecksumsPlugin";
+export * from "./resolveFlexibleChecksumsConfig";