fix(ux): tolerate legacy template encoding

tests/test_ai_automation_smoke_service.py

@@ -394,6 +394,29 @@ def test_sitewide_ui_ux_repair_package_prioritizes_controlled_template_repairs()
         assert package["repair_items"][0]["controlled_actions"]
 
 
+def test_sitewide_ui_ux_agent_reports_non_utf8_templates(tmp_path):
+    from services.ai_surface_html_readback_service import (
+        build_sitewide_ui_ux_agent_inventory,
+        build_sitewide_ui_ux_repair_package,
+    )
+
+    template_dir = tmp_path / "templates"
+    template_dir.mkdir()
+    (template_dir / "legacy_dashboard.html").write_bytes(b"\xa3 legacy dashboard")
+
+    inventory = build_sitewide_ui_ux_agent_inventory(root=tmp_path)
+    issue = inventory["issue_surfaces"][0]
+    package = build_sitewide_ui_ux_repair_package(source_inventory=inventory)
+
+    assert inventory["status"] == "warning"
+    assert issue["status"] == "critical"
+    assert issue["findings"][0]["type"] == "template_encoding_error"
+    assert package["repair_items"][0]["controlled_actions"][0]["action"] == (
+        "normalize_template_encoding_utf8"
+    )
+    assert package["safety"]["writes_database"] is False
+
+
 def test_surface_html_readback_check_is_part_of_ai_smoke(monkeypatch):
     from services import ai_automation_smoke_service as smoke