Fix duplicate HEAD route on project result endpoint.

aiohttp registers HEAD automatically for GET routes; the explicit head
handler caused ComfyUI startup to fail with a route conflict.

movie_editor/server.py

@@ -947,6 +947,17 @@ if web is not None and PromptServer is not None:
 
     @routes.get(UI_PREFIX + "/api/projects/{pid}/result")
     async def _result(req):
+        import os
+        if req.method == "HEAD":
+            _project_or_404(req.match_info["pid"])
+            path = _resolve_comfy_media_path(
+                req.query.get("filename", ""),
+                req.query.get("subfolder", ""),
+                req.query.get("type", "output"),
+            )
+            if not path or not os.path.isfile(path):
+                raise web.HTTPNotFound()
+            return web.Response()
         try:
             data, ctype = await bridge.fetch_view(
                 req.query.get("filename", ""),
@@ -957,20 +968,6 @@ if web is not None and PromptServer is not None:
             raise web.HTTPBadGateway(reason=f"could not fetch result: {e}")
         return web.Response(body=data, content_type=ctype.split(";")[0])
 
-    @routes.head(UI_PREFIX + "/api/projects/{pid}/result")
-    async def _result_head(req):
-        """Existence check for scene renders — used by the editor on project load."""
-        import os
-        _project_or_404(req.match_info["pid"])
-        path = _resolve_comfy_media_path(
-            req.query.get("filename", ""),
-            req.query.get("subfolder", ""),
-            req.query.get("type", "output"),
-        )
-        if not path or not os.path.isfile(path):
-            raise web.HTTPNotFound()
-        return web.Response()
-
     # --- API: final render (hard-cut concat of kept clips, with per-clip in/out) ---
     @routes.post(UI_PREFIX + "/api/projects/{pid}/render")
     async def _render_final(req):