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/rc/cli.js

@@ -0,0 +1,4 @@
+#! /usr/bin/env node
+var rc = require('./index')
+
+console.log(JSON.stringify(rc(process.argv[2]), false, 2))