maker: mm/px a mano nel wizard DXF per immagini da file (Refs #98)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/frontend/flask_app/tests/test_dxf_recipe_routes.py

@@ -178,6 +178,12 @@ class TestDxfCompareProxy:
         assert set(kwargs["files"]) == {"image", "dxf"}
         assert kwargs["files"]["image"][1] == PNG
 
+    def test_manual_px_per_mm_forwarded(self, logged_in_client, mock_api_client):
+        # #98: scala a mano dal wizard (immagine da file): inoltrata al backend
+        mock_api_client.post.return_value = self.OK
+        self._post(logged_in_client, station_id="4", px_per_mm="71.1237")
+        assert mock_api_client.post.call_args.kwargs["data"]["px_per_mm"] == "71.1237"
+
     def test_save_true_forwarded(self, logged_in_client, mock_api_client):
         mock_api_client.post.return_value = {**self.OK, "saved": True, "recipe_dir": "vision/recipes/7/x"}
         resp = self._post(logged_in_client, save="true")
@@ -229,4 +235,5 @@ class TestPages:
         assert "js/dxf_recipe_wizard.js" in html
         assert "dxfRecipeWizard(" in html
         assert "@dxf-recipe-saved" in html
+        assert 'x-model="mmPx"' in html  # #98: campo mm/px a mano
         assert "Pezzo scuro su fondo chiaro" in html or "Dark part on light" in html