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/foreground-child/dist/commonjs/proxy-signals.d.ts

@@ -0,0 +1,6 @@
+import { type ChildProcess } from 'child_process';
+/**
+ * Starts forwarding signals to `child` through `parent`.
+ */
+export declare const proxySignals: (child: ChildProcess) => () => void;
+//# sourceMappingURL=proxy-signals.d.ts.map