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/@aws-crypto/sha256-js/build/module/jsSha256.d.ts

@@ -0,0 +1,12 @@
+import { Checksum, SourceData } from "@aws-sdk/types";
+export declare class Sha256 implements Checksum {
+    private readonly secret?;
+    private hash;
+    private outer?;
+    private error;
+    constructor(secret?: SourceData);
+    update(toHash: SourceData): void;
+    digestSync(): Uint8Array;
+    digest(): Promise<Uint8Array>;
+    reset(): void;
+}