feat(runtime): capture step evidence in console

tests/test_runtime_console_web.py

@@ -238,16 +238,37 @@ def test_task_detail_renders_timeline_with_screenshot(tmp_path) -> None:
         task_id="task-with-timeline",
         scene={"screen": {"width": 10, "height": 20}, "elements": []},
         prompt="tap search",
-        tool_call={"action": "tap", "args": {"x": 1, "y": 2}},
+        tool_call={
+            "action": "tap",
+            "description": "tap search",
+            "args": {"x": 1, "y": 2},
+        },
         result={"ok": True},
-        screenshot=PNG_10X20,
+        before_screenshot=PNG_10X20 + b"before",
+        after_screenshot=PNG_10X20 + b"after",
+        ocr_results=[
+            {
+                "text": "Search",
+                "confidence": 0.98,
+                "bounds": {"x": 1, "y": 2, "width": 3, "height": 4},
+            }
+        ],
     )
     body = client.get("/ui/tasks/task-with-timeline").text
-    expected_data_uri = "data:image/png;base64," + base64.b64encode(PNG_10X20).decode(
-        "ascii"
-    )
-    assert expected_data_uri in body
-    assert "tap" in body
+    before_data_uri = "data:image/png;base64," + base64.b64encode(
+        PNG_10X20 + b"before"
+    ).decode("ascii")
+    after_data_uri = "data:image/png;base64," + base64.b64encode(
+        PNG_10X20 + b"after"
+    ).decode("ascii")
+    assert before_data_uri in body
+    assert after_data_uri in body
+    assert "Before action" in body
+    assert "After action" in body
+    assert "Operation" in body
+    assert "OCR results" in body
+    assert "Search" in body
+    assert "UI tree" not in body
 
 
 def test_task_detail_404_for_unknown_task(tmp_path) -> None:
@@ -256,6 +277,39 @@ def test_task_detail_404_for_unknown_task(tmp_path) -> None:
     assert response.status_code == 404
 
 
+def test_task_detail_renders_normalized_ui_tree_result(tmp_path) -> None:
+    timeline = Timeline(ArtifactStore(tmp_path / "history"))
+    client, metadata_store = _client(tmp_path, timeline=timeline)
+    metadata_store.create_task(
+        Task(id="task-ui-tree", goal="inspect the screen", device_id="iphone-1")
+    )
+    timeline.append(
+        task_id="task-ui-tree",
+        scene={"screen": {"width": 10, "height": 20}, "elements": []},
+        prompt="inspect the screen",
+        tool_call={"action": "get_ui_tree", "description": "inspect UI tree"},
+        result={
+            "success": True,
+            "result": [
+                {
+                    "id": "ui-000",
+                    "type": "button",
+                    "text": "Search",
+                    "bounds": {"x": 1, "y": 2, "width": 3, "height": 4},
+                    "confidence": 1.0,
+                }
+            ],
+        },
+    )
+
+    body = client.get("/ui/tasks/task-ui-tree").text
+
+    assert "UI tree" in body
+    assert "1 normalized nodes" in body
+    assert "button" in body
+    assert "Search" in body
+
+
 def test_config_page_lists_supported_drivers_and_current_max_steps(tmp_path) -> None:
     config_store = DeviceConfigStore(tmp_path / "device_config.sqlite3")
     config_store.set_setting("max_steps", 5)