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/middleware-endpoint/dist-es/getEndpointPlugin.js

@@ -0,0 +1,18 @@
+import { serializerMiddlewareOption } from "@smithy/middleware-serde";
+import { endpointMiddleware } from "./endpointMiddleware";
+export const endpointMiddlewareOptions = {
+    step: "serialize",
+    tags: ["ENDPOINT_PARAMETERS", "ENDPOINT_V2", "ENDPOINT"],
+    name: "endpointV2Middleware",
+    override: true,
+    relation: "before",
+    toMiddleware: serializerMiddlewareOption.name,
+};
+export const getEndpointPlugin = (config, instructions) => ({
+    applyToStack: (clientStack) => {
+        clientStack.addRelativeTo(endpointMiddleware({
+            config,
+            instructions,
+        }), endpointMiddlewareOptions);
+    },
+});