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/shared-ini-file-loader/dist-es/getCredentialsFilepath.js

@@ -0,0 +1,4 @@
+import { join } from "path";
+import { getHomeDir } from "./getHomeDir";
+export const ENV_CREDENTIALS_PATH = "AWS_SHARED_CREDENTIALS_FILE";
+export const getCredentialsFilepath = () => process.env[ENV_CREDENTIALS_PATH] || join(getHomeDir(), ".aws", "credentials");