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/crc32-stream/lib/index.js

@@ -0,0 +1,14 @@
+/**
+ * node-crc32-stream
+ *
+ * Copyright (c) 2014 Chris Talkington, contributors.
+ * Licensed under the MIT license.
+ * https://github.com/archiverjs/node-crc32-stream/blob/master/LICENSE-MIT
+ */
+
+'use strict';
+
+module.exports = {
+  CRC32Stream: require('./crc32-stream'),
+  DeflateCRC32Stream: require('./deflate-crc32-stream')
+}