fix: 修改一下生图的 bug

server/tests/test_export.py

@@ -0,0 +1,32 @@
+"""单图导出响应头回归测试。"""
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+from unittest.mock import AsyncMock, patch
+
+SERVER_DIR = Path(__file__).resolve().parents[1]
+if str(SERVER_DIR) not in sys.path:
+    sys.path.insert(0, str(SERVER_DIR))
+
+from api.export import ExportImageItem, export_image
+
+
+class ExportImageTests(unittest.IsolatedAsyncioTestCase):
+    async def test_chinese_filename_uses_rfc5987_header(self) -> None:
+        image = ExportImageItem(
+            url="https://example.com/image.png",
+            key="尺寸标注图",
+            variantName="蓝色",
+        )
+        with patch("api.export._download", new=AsyncMock(return_value=(b"image", "image/png"))):
+            response = await export_image(image)
+
+        disposition = response.headers["content-disposition"]
+        self.assertIn('filename="_____-__.png"', disposition)
+        self.assertIn("filename*=UTF-8''%E5%B0%BA%E5%AF%B8%E6%A0%87%E6%B3%A8%E5%9B%BE-%E8%93%9D%E8%89%B2.png", disposition)
+
+
+if __name__ == "__main__":
+    unittest.main()