test(migration): lock compatibility policy into canonical workspace

test_extension_support_pipeline.py

@@ -1,5 +1,6 @@
 from core import extension_support_pipeline as support
 from core import extension_support_guard as guard
+from core import migration_scope_suite as scope_ui
 
 
 def test_support_mode_is_operator_controlled():
@@ -81,3 +82,10 @@ def test_candidate_elements_flattens_failure_and_skip_lists_without_crashing():
         ]}},
     })
     assert got == ["com_easyblog", "com_rsform", "com_logman", "com_weblinks"]
+
+
+def test_canonical_scope_ui_owns_compatibility_policy_control():
+    assert 'id="compatibility-mode"' in scope_ui._SCOPE_PANEL
+    assert 'value="assisted" selected' in scope_ui._SCOPE_PANEL
+    assert "compatibility_mode:($('#compatibility-mode')?.value||'assisted')" in scope_ui._SCOPE_SCRIPT
+    assert "$('#compatibility-mode')?.addEventListener('change',refresh);" in scope_ui._SCOPE_SCRIPT