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/test/ini.js

@@ -0,0 +1,16 @@
+var cc =require('../lib/utils')
+var INI = require('ini')
+var assert = require('assert')
+
+function test(obj) {
+
+  var _json, _ini
+  var json = cc.parse (_json = JSON.stringify(obj))
+  var ini = cc.parse (_ini = INI.stringify(obj))
+  console.log(_ini, _json)
+  assert.deepEqual(json, ini)
+}
+
+
+test({hello: true})
+