feat(测量): 接口1/6 返回与标注图一致的竖线坐标

前端需要按标注图重绘竖线，坐标与画线共用同一套几何。

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_api.py

@@ -461,7 +461,7 @@ def test_success_structure(client):
     data = body["data"]
     # 业务字段对齐文档
     assert set(["face_total_height_cm", "four_courts", "seven_eyes",
-                "landmarks", "hairline_source", "head_pose",
+                "landmarks", "hairline_source", "head_pose", "vertical_lines",
                 "annotated_image_base64"]).issubset(data.keys())
     assert set(["top_court_cm", "upper_court_cm", "middle_court_cm",
                 "lower_court_cm", "ratios"]).issubset(data["four_courts"].keys())
@@ -478,3 +478,40 @@ def test_success_structure(client):
     assert "annotated_image_url" not in data
     png = base64.b64decode(data["annotated_image_base64"])
     assert png[:8] == b"\x89PNG\r\n\x1a\n"
+    _assert_vertical_lines(data, "v1")
+
+
+_INNER_VLINES = [
+    "left_cheek", "left_eye_outer", "left_eye_inner",
+    "right_eye_inner", "right_eye_outer", "right_cheek",
+]
+
+
+def _assert_vertical_lines(data, variant):
+    vl = data["vertical_lines"]
+    assert isinstance(vl["y_top"], int) and isinstance(vl["y_bottom"], int)
+    assert vl["y_top"] < vl["y_bottom"]
+    names = [line["name"] for line in vl["lines"]]
+    xs = [line["x"] for line in vl["lines"]]
+    assert xs == sorted(xs)
+    assert all(isinstance(x, int) for x in xs)
+    if variant == "v6":
+        assert names == _INNER_VLINES
+        assert vl["y_top"] == data["landmarks"]["hairline"]["y"]
+        assert vl["y_bottom"] == data["landmarks"]["chin_tip"]["y"]
+        assert "eye1" not in data["seven_eyes"]
+        assert "eye7" not in data["seven_eyes"]
+        return
+    assert set(_INNER_VLINES).issubset(names)
+    assert names[0] in ("left_head_edge", "left_cheek")
+    assert names[-1] in ("right_head_edge", "right_cheek")
+    by_name = {line["name"]: line["x"] for line in vl["lines"]}
+    assert ("left_head_edge" in by_name) == (data["seven_eyes"]["eye1"] is not None)
+    assert ("right_head_edge" in by_name) == (data["seven_eyes"]["eye7"] is not None)
+
+
+def test_measure_v2_vertical_lines_have_no_head_edges(client):
+    files = {"image_file": ("frontal.jpg", open(fixture("frontal.jpg"), "rb"), "application/octet-stream")}
+    body = client.post("/api/v1/face/measure-v2", headers=H, files=files).json()
+    assert body["code"] == 0, body
+    _assert_vertical_lines(body["data"], "v6")