fix: 将52号接口范围限定为GPU worker

撤回52号网关路由、图片字段改名和mock改动，gateway目录恢复a3fddbb。worker保持base64和null响应，更新接口说明和回归测试。

验证：worker API、IP限制与网关兼容性共54项测试通过。

gateway/app.py

@@ -208,8 +208,6 @@ async def index():
             "if3_hair_grow_b": "/static/test_interface3.html",
             "if4_features": "/static/test_interface4.html",
             "if5_hairline": "/static/test_interface5.html",
-            "if52_hairline": "/static/test_interface52.html",
-            "if52_compare": "/static/test_interface52_compare.html",
             "if6_measure_v2": "/static/test_interface6.html",
             "if7_hair_grow_v2": "/static/test_interface7.html",
             "if9_head_mask": "/static/test_interface9.html",
@@ -593,12 +591,6 @@ async def hairline_generate(request: Request):
     return await _proxy(request, "/api/v1/hairline/generate")
 
 
-@app.post("/api/v1/hairline/generate-52", tags=["人脸分析"])
-async def hairline_generate_52(request: Request):
-    """接口52：新高度规则、扶正裁切与发际线生成"""
-    return await _proxy(request, "/api/v1/hairline/generate-52")
-
-
 @app.post("/api/v1/hair/grow-v2", tags=["生发"])
 async def hair_grow_v2(request: Request):
     """接口7：C端生发 v2（add_hair2 工作流）"""

gateway/forward.py

@@ -88,8 +88,6 @@ def rewrite_base64_to_url(
     obj: Any,
     public_base_url: str,
     static_dir: str,
-    *,
-    rewrite_null_images: bool = False,
 ) -> Any:
     """递归遍历响应 JSON，将所有 *_base64 字段改写为 *_url。
 
@@ -97,16 +95,10 @@ def rewrite_base64_to_url(
     - 支持 data: URI 和原始 base64 两种格式
     - 解码 base64 → 保存到 static_dir/{uuid}.png
     - 删除 *_base64 字段，新增 *_url 字段指向公网 URL
-    - 接口52显式开启 rewrite_null_images，空图片也返回 *_url: null；旧接口保持原空字段
     """
     if isinstance(obj, dict):
         new_dict: Dict[str, Any] = {}
         for key, value in obj.items():
-            if rewrite_null_images and key.endswith("_base64") and value is None:
-                # Deprecated/optional image fields must keep their external
-                # *_url names even when no image is generated.
-                new_dict[key[:-7] + "_url"] = None
-                continue
             if key.endswith("_base64") and isinstance(value, str):
                 img_bytes = _decode_base64_value(value)
                 if img_bytes is not None:
@@ -126,12 +118,10 @@ def rewrite_base64_to_url(
                     logger.warning("字段 %s 的值无法解码为图片，保留", key)
                     new_dict[key] = value
             else:
-                new_dict[key] = rewrite_base64_to_url(
-                    value, public_base_url, static_dir, rewrite_null_images=rewrite_null_images)
+                new_dict[key] = rewrite_base64_to_url(value, public_base_url, static_dir)
         return new_dict
     elif isinstance(obj, list):
-        return [rewrite_base64_to_url(item, public_base_url, static_dir,
-                                     rewrite_null_images=rewrite_null_images) for item in obj]
+        return [rewrite_base64_to_url(item, public_base_url, static_dir) for item in obj]
     else:
         return obj
 
@@ -258,9 +248,7 @@ async def proxy_request(request: Request, path: str) -> JSONResponse:
                 )
 
             # 递归改写 base64 图片字段
-            rewritten = rewrite_base64_to_url(
-                worker_json, public_base_url, static_dir,
-                rewrite_null_images=path == "/api/v1/hairline/generate-52")
+            rewritten = rewrite_base64_to_url(worker_json, public_base_url, static_dir)
 
             return JSONResponse(
                 status_code=resp.status_code,

gateway/stub_worker.py

@@ -7,7 +7,6 @@
 - POST /api/v1/hair/grow-b     → mock 响应
 - POST /api/v1/face/features   → mock 响应
 - POST /api/v1/hairline/generate → mock 响应
-- POST /api/v1/hairline/generate-52 → 新规则 mock 响应
 
 鉴权：校验 X-Internal-Token 头，不匹配返回 401。
 并发模拟：可通过 ?delay=N 让接口 sleep N 秒（默认 1）。
@@ -214,7 +213,6 @@ def create_app(port: int, password: str) -> FastAPI:
 
     # --- 接口5 ---
     @app.post("/api/v1/hairline/generate")
-    @app.post("/api/v1/hairline/generate-52")
     async def hairline_generate(
         request: Request,
         x_internal_token: Optional[str] = Header(default=None),
@@ -247,14 +245,6 @@ def create_app(port: int, password: str) -> FastAPI:
             ],
             "best_hairline_center_point": {"x": 540, "y": 430},
         }
-        if request.url.path.endswith("generate-52"):
-            for item in data["hairline_images"]:
-                item["image_high_base64"] = None
-                item["image_low_base64"] = None
-            data.update(high_hairline_center_point=None, low_hairline_center_point=None,
-                        face_measure=None, framing=None, height_rule=None,
-                        guide_landmarks={}, input_image_base64=_png, original_image_base64=_png,
-                        coordinate_space="original_image", width=1, height=1)
         return mock_ok(data, delay=delay)
 
     return app