Pannello visione: zoom, Adatta e trascinamento sull'immagine

Refs #115

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

src/frontend/flask_app/tests/test_vision_panel_fit.py

@@ -46,6 +46,17 @@ def test_image_is_object_contain_without_h_auto():
     assert "object-contain" in canvas  # stesso fit dell'img: overlay allineato
 
 
+def test_zoom_viewport_scrolls_inside_the_box():
+    # #115: il riquadro resta overflow-hidden (il pannello non scorre); lo scorrimento e' solo del viewport interno
+    panel = _panel()
+    vp = _tag_with(panel, 'x-ref="vp"')
+    assert "absolute" in vp and "inset-0" in vp
+    assert "overflow:auto" in vp  # :style stringa del viewport
+    assert 'style="' not in vp.replace(':style="', "")  # niente style statico accanto a :style (Alpine lo cancella)
+    assert "x-show" not in vp  # mai x-show e :style stringa sullo stesso elemento
+    assert "zSize()" in panel  # wrapper naturale x zoom
+
+
 def test_image_box_and_outcome_column_can_shrink():
     panel = _panel()
     box = _tag_with(panel, 'x-show="shownImage"')