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/util-endpoints/dist-es/utils/getReferenceValue.js

@@ -0,0 +1,7 @@
+export const getReferenceValue = ({ ref }, options) => {
+    const referenceRecord = {
+        ...options.endpointParams,
+        ...options.referenceRecord,
+    };
+    return referenceRecord[ref];
+};