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/jsonwebtoken/decode.js

@@ -0,0 +1,30 @@
+var jws = require('jws');
+
+module.exports = function (jwt, options) {
+  options = options || {};
+  var decoded = jws.decode(jwt, options);
+  if (!decoded) { return null; }
+  var payload = decoded.payload;
+
+  //try parse the payload
+  if(typeof payload === 'string') {
+    try {
+      var obj = JSON.parse(payload);
+      if(obj !== null && typeof obj === 'object') {
+        payload = obj;
+      }
+    } catch (e) { }
+  }
+
+  //return header if `complete` option is enabled.  header includes claims
+  //such as `kid` and `alg` used to select the key within a JWKS needed to
+  //verify the signature
+  if (options.complete === true) {
+    return {
+      header: decoded.header,
+      payload: payload,
+      signature: decoded.signature
+    };
+  }
+  return payload;
+};