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/supports-web-crypto/README.md

@@ -0,0 +1,32 @@
+# @aws-crypto/supports-web-crypto
+
+Functions to check web crypto support for browsers.
+
+## Usage
+
+```
+import {supportsWebCrypto} from '@aws-crypto/supports-web-crypto';
+
+if (supportsWebCrypto(window)) {
+  // window.crypto.subtle.encrypt will exist
+}
+
+```
+
+## supportsWebCrypto
+
+Used to make sure `window.crypto.subtle` exists and implements crypto functions
+as well as a cryptographic secure random source exists.
+
+## supportsSecureRandom
+
+Used to make sure that a cryptographic secure random source exists.
+Does not check for `window.crypto.subtle`.
+
+## supportsSubtleCrypto
+
+## supportsZeroByteGCM
+
+## Test
+
+`npm test`