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/eventstream-serde-node/dist-es/utils.js

@@ -0,0 +1,26 @@
+export async function* readabletoIterable(readStream) {
+    let streamEnded = false;
+    let generationEnded = false;
+    const records = new Array();
+    readStream.on("error", (err) => {
+        if (!streamEnded) {
+            streamEnded = true;
+        }
+        if (err) {
+            throw err;
+        }
+    });
+    readStream.on("data", (data) => {
+        records.push(data);
+    });
+    readStream.on("end", () => {
+        streamEnded = true;
+    });
+    while (!generationEnded) {
+        const value = await new Promise((resolve) => setTimeout(() => resolve(records.shift()), 0));
+        if (value) {
+            yield value;
+        }
+        generationEnded = streamEnded && records.length === 0;
+    }
+}