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/hash-blob-browser/dist-cjs/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+var chunkedBlobReader = require('@smithy/chunked-blob-reader');
+
+const blobHasher = async function blobHasher(hashCtor, blob) {
+    const hash = new hashCtor();
+    await chunkedBlobReader.blobReader(blob, (chunk) => {
+        hash.update(chunk);
+    });
+    return hash.digest();
+};
+
+exports.blobHasher = blobHasher;