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/@smithy/util-endpoints/dist-es/utils/getEndpointUrl.js

@@ -0,0 +1,15 @@
+import { EndpointError } from "../types";
+import { evaluateExpression } from "./evaluateExpression";
+export const getEndpointUrl = (endpointUrl, options) => {
+    const expression = evaluateExpression(endpointUrl, "Endpoint URL", options);
+    if (typeof expression === "string") {
+        try {
+            return new URL(expression);
+        }
+        catch (error) {
+            console.error(`Failed to construct URL with ${expression}`, error);
+            throw error;
+        }
+    }
+    throw new EndpointError(`Endpoint URL must be a string, got ${typeof expression}`);
+};