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/chunked-blob-reader-native/dist-cjs/index.js

@@ -0,0 +1,32 @@
+'use strict';
+
+var utilBase64 = require('@smithy/util-base64');
+
+function blobReader(blob, onChunk, chunkSize = 1024 * 1024) {
+    return new Promise((resolve, reject) => {
+        const fileReader = new FileReader();
+        fileReader.onerror = reject;
+        fileReader.onabort = reject;
+        const size = blob.size;
+        let totalBytesRead = 0;
+        const read = () => {
+            if (totalBytesRead >= size) {
+                resolve();
+                return;
+            }
+            fileReader.readAsDataURL(blob.slice(totalBytesRead, Math.min(size, totalBytesRead + chunkSize)));
+        };
+        fileReader.onload = (event) => {
+            const result = event.target.result;
+            const dataOffset = result.indexOf(",") + 1;
+            const data = result.substring(dataOffset);
+            const decoded = utilBase64.fromBase64(data);
+            onChunk(decoded);
+            totalBytesRead += decoded.byteLength;
+            read();
+        };
+        read();
+    });
+}
+
+exports.blobReader = blobReader;