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/expand-template/index.js

@@ -0,0 +1,26 @@
+module.exports = function (opts) {
+  var sep = opts ? opts.sep : '{}'
+  var len = sep.length
+
+  var whitespace = '\\s*'
+  var left = escape(sep.substring(0, len / 2)) + whitespace
+  var right = whitespace + escape(sep.substring(len / 2, len))
+
+  return function (template, values) {
+    Object.keys(values).forEach(function (key) {
+      var value = String(values[key]).replace(/\$/g, '$$$$')
+      template = template.replace(regExp(key), value)
+    })
+    return template
+  }
+
+  function escape (s) {
+    return [].map.call(s, function (char) {
+      return '\\' + char
+    }).join('')
+  }
+
+  function regExp (key) {
+    return new RegExp(left + key + right, 'g')
+  }
+}