feat: unify card runtime and event-driven web ui

examples/cards/instances/live-outdoor-aqi/card.json

@@ -0,0 +1,17 @@
+{
+  "id": "live-outdoor-aqi",
+  "kind": "text",
+  "title": "Outdoor AQI",
+  "question": "",
+  "choices": [],
+  "response_value": "",
+  "slot": "live-outdoor-aqi",
+  "lane": "context",
+  "priority": 24,
+  "state": "active",
+  "template_key": "sensor-live",
+  "context_summary": "",
+  "chat_id": "web",
+  "created_at": "2026-04-05T20:40:00-04:00",
+  "updated_at": "2026-04-05T20:40:00-04:00"
+}

examples/cards/instances/live-outdoor-aqi/state.json

@@ -0,0 +1,17 @@
+{
+  "title": "Outdoor AQI",
+  "subtitle": "Outdoor air quality",
+  "tool_name": "mcp_home_assistant_GetLiveContext",
+  "match_name": "Worcester Summer St Air quality index",
+  "device_class": "aqi",
+  "unit": "AQI",
+  "refresh_ms": 300000,
+  "value_decimals": 0,
+  "alert_only": true,
+  "alert_score_elevated": 90,
+  "alert_score_high": 99,
+  "thresholds": {
+    "good_max": 100,
+    "elevated_max": 150
+  }
+}