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/middleware-retry/dist-es/util.js

@@ -0,0 +1,9 @@
+export const asSdkError = (error) => {
+    if (error instanceof Error)
+        return error;
+    if (error instanceof Object)
+        return Object.assign(new Error(), error);
+    if (typeof error === "string")
+        return new Error(error);
+    return new Error(`AWS SDK error wrapper for ${error}`);
+};