fix(export): outline SVG text for AI export

backend/tests/test_ai_export.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+from xml.etree import ElementTree as ET
+
+
+BACKEND_DIR = Path(__file__).resolve().parents[1]
+if str(BACKEND_DIR) not in sys.path:
+    sys.path.insert(0, str(BACKEND_DIR))
+
+from service import app as service_app  # noqa: E402
+
+
+def test_ai_export_outlines_chinese_svg_text() -> None:
+    source = b'''<svg xmlns="http://www.w3.org/2000/svg" width="300" height="100">
+      <text x="12" y="56" font-size="42" fill="#112233" transform="rotate(2 0 0)">你好 AI</text>
+    </svg>'''
+
+    outlined = service_app._outline_svg_text(source)
+    root = ET.fromstring(outlined)
+    names = [element.tag.rsplit("}", 1)[-1] for element in root.iter()]
+
+    assert "text" not in names
+    assert names.count("path") >= 3
+    assert b'rotate(2 0 0)' in outlined
+    assert b'fill="#112233"' in outlined