Add Pico dashboard app controller

tests/test_pico_core.py

@@ -778,3 +778,42 @@ def test_dashboard_renderer_creates_draw_commands():
     assert ("text", 0, 128, "Fridge", 1) in display.commands
     assert ("text", 0, 232, "Power", 1) in display.commands
     assert ("text", 0, 440, "[Dash]", 1) in display.commands
+
+
+def test_pico_dashboard_app_tick_updates_alarms_and_buzzer():
+    from app import PicoDashboardApp
+    from comms.uart_client import UartClient
+    from comms.communication_service import CommunicationService
+    from hardware.display import Display
+    from hardware.buzzer import Buzzer
+    from ui.renderers import DashboardRenderer
+    from ui.touch_router import TouchRouter
+
+    fake_uart = FakeUart()
+    fake_uart.read_chunks = [
+        b'{"type":"status_response","battery":{"soc":10,"voltage":11.8},"temps":{"fridge_zone_1":45.0},"sensor_health":{"fridge_zone_1":true,"fridge_zone_2":true,"rear_seat":true,"outside":true},"network":{"uart_connected":true}}\n'
+    ]
+
+    state = AppState()
+    comms = CommunicationService(UartClient(fake_uart), state)
+    screens = ScreenManager()
+    display = Display()
+    buzzer = Buzzer()
+
+    app = PicoDashboardApp(
+        app_state=state,
+        communication_service=comms,
+        screen_manager=screens,
+        touch_router=TouchRouter(screens),
+        display=display,
+        dashboard_renderer=DashboardRenderer(display),
+        buzzer=buzzer,
+    )
+
+    app.tick()
+
+    assert "battery_soc_low" in app.alarms
+    assert "battery_voltage_low" in app.alarms
+    assert "fridge_zone_1_high" in app.alarms
+    assert buzzer.enabled is True
+    assert display.commands