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/util-endpoints/dist-es/lib/isValidHostLabel.js

@@ -0,0 +1,13 @@
+const VALID_HOST_LABEL_REGEX = new RegExp(`^(?!.*-$)(?!-)[a-zA-Z0-9-]{1,63}$`);
+export const isValidHostLabel = (value, allowSubDomains = false) => {
+    if (!allowSubDomains) {
+        return VALID_HOST_LABEL_REGEX.test(value);
+    }
+    const labels = value.split(".");
+    for (const label of labels) {
+        if (!isValidHostLabel(label)) {
+            return false;
+        }
+    }
+    return true;
+};