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/getEndpointHeaders.js

@@ -0,0 +1,12 @@
+import { EndpointError } from "../types";
+import { evaluateExpression } from "./evaluateExpression";
+export const getEndpointHeaders = (headers, options) => Object.entries(headers).reduce((acc, [headerKey, headerVal]) => ({
+    ...acc,
+    [headerKey]: headerVal.map((headerValEntry) => {
+        const processedExpr = evaluateExpression(headerValEntry, "Header value entry", options);
+        if (typeof processedExpr !== "string") {
+            throw new EndpointError(`Header '${headerKey}' value '${processedExpr}' is not a string`);
+        }
+        return processedExpr;
+    }),
+}), {});