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/protocol-http/dist-es/Fields.js

@@ -0,0 +1,20 @@
+export class Fields {
+    entries = {};
+    encoding;
+    constructor({ fields = [], encoding = "utf-8" }) {
+        fields.forEach(this.setField.bind(this));
+        this.encoding = encoding;
+    }
+    setField(field) {
+        this.entries[field.name.toLowerCase()] = field;
+    }
+    getField(name) {
+        return this.entries[name.toLowerCase()];
+    }
+    removeField(name) {
+        delete this.entries[name.toLowerCase()];
+    }
+    getByType(kind) {
+        return Object.values(this.entries).filter((field) => field.kind === kind);
+    }
+}