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-stream/dist-es/checksum/createChecksumStream.js

@@ -0,0 +1,9 @@
+import { isReadableStream } from "../stream-type-check";
+import { ChecksumStream } from "./ChecksumStream";
+import { createChecksumStream as createChecksumStreamWeb } from "./createChecksumStream.browser";
+export function createChecksumStream(init) {
+    if (typeof ReadableStream === "function" && isReadableStream(init.source)) {
+        return createChecksumStreamWeb(init);
+    }
+    return new ChecksumStream(init);
+}