docs: update api_downapp.md — add curl examples and rl_assets API

- Add curl examples for all 5 APIs (rl_verify, rl_query_groups, rl_upload, rl_status, rl_assets)
- Add new section 5: rl_assets.dspy (list assets by vendor_group_id)
- All curl examples use production baseurl and Bearer token auth

docs/api_downapp.md

@@ -68,6 +68,18 @@ Content-Type: application/json
 
 **注意**：终端用户在 H5 页面完成认证后，系统将自动在 `rl_org_group` 表中登记该机构与组合 ID 的映射关系。
 
+### curl 示例
+```bash
+curl -X POST 'https://token.opencomputing.cn/reallife_asset/api/rl_verify.dspy' \
+  -H 'Authorization: Bearer YOUR_TOKEN' \
+  -H 'Content-Type: application/json' \
+  -d '{
+    "vendor": "volcengine",
+    "project_name": "default",
+    "name": "张三"
+  }'
+```
+
 ---
 
 ## 2. 查询已认证的组合列表
@@ -103,6 +115,12 @@ Authorization: Bearer <your_api_key>
 }
 ```
 
+### curl 示例
+```bash
+curl -X POST 'https://token.opencomputing.cn/reallife_asset/api/rl_query_groups.dspy' \
+  -H 'Authorization: Bearer YOUR_TOKEN'
+```
+
 ---
 
 ## 3. 上传素材
@@ -163,6 +181,19 @@ Content-Type: application/json
 
 **注意**：上传是异步操作，初始状态为 `Processing`，需调用第 4 个接口轮询状态。
 
+### curl 示例
+```bash
+curl -X POST 'https://token.opencomputing.cn/reallife_asset/api/rl_upload.dspy' \
+  -H 'Authorization: Bearer YOUR_TOKEN' \
+  -H 'Content-Type: application/json' \
+  -d '{
+    "vendor_group_id": "volc-asset-group-xxx",
+    "source_url": "https://bucket.oss.com/photo.jpg",
+    "asset_type": "Image",
+    "name": "模特A"
+  }'
+```
+
 ---
 
 ## 4. 查询素材状态
@@ -202,6 +233,73 @@ Content-Type: application/json
 
 > **说明**：火山引擎的素材**永久存储**在其服务器上。`url` 是临时签名下载链接，过期后可通过再次调用 `rl_status` 获取新链接。素材的永久引用为上传时返回的 `vendor_asset_id`。
 
+### curl 示例
+```bash
+curl -X POST 'https://token.opencomputing.cn/reallife_asset/api/rl_status.dspy' \
+  -H 'Authorization: Bearer YOUR_TOKEN' \
+  -H 'Content-Type: application/json' \
+  -d '{
+    "asset_id": "asset_record_id_xxx"
+  }'
+```
+
+---
+
+## 5. 查询组合下所有素材
+**Endpoint**: `/reallife_asset/api/rl_assets.dspy`
+
+查询指定 `vendor_group_id` 下的所有素材列表。
+
+### 请求参数
+| 参数 | 必填 | 说明 |
+|------|------|------|
+| `vendor_group_id` | 是 | 认证成功后获得的供应商组合 ID |
+
+> `org_id` 由 Bearer Token 自动获取，无需传递。
+
+### 请求示例
+```http
+POST /reallife_asset/api/rl_assets.dspy
+Authorization: Bearer ***
+Content-Type: application/json
+
+{
+  "vendor_group_id": "volc-asset-group-xxx"
+}
+```
+
+### 返回示例
+**成功**：
+```json
+{
+  "status": "ok",
+  "data": {
+    "assets": [
+      {
+        "id": "asset_record_id_xxx",
+        "vendor_asset_id": "asset-2026...",
+        "name": "模特A",
+        "asset_type": "Image",
+        "status": "Active",
+        "url": "https://... (临时下载链接)",
+        "create_time": "2026-05-28 15:30:00"
+      }
+    ],
+    "total": 3
+  }
+}
+```
+
+### curl 示例
+```bash
+curl -X POST 'https://token.opencomputing.cn/reallife_asset/api/rl_assets.dspy' \
+  -H 'Authorization: Bearer YOUR_TOKEN' \
+  -H 'Content-Type: application/json' \
+  -d '{
+    "vendor_group_id": "volc-asset-group-xxx"
+  }'
+```
+
 ---
 
 ## 错误代码说明