Add Pico display rendering abstraction

tests/test_pico_core.py

@@ -722,3 +722,59 @@ def test_touch_router_ignores_unpressed_event():
 
     assert handled is False
     assert screens.current_screen == "dashboard"
+
+
+def test_display_records_commands():
+    from hardware.display import Display
+
+    display = Display()
+
+    display.clear()
+    display.text(1, 2, "hello", size=2)
+    display.rect(3, 4, 5, 6, filled=True)
+
+    assert display.commands == [
+        ("clear",),
+        ("text", 1, 2, "hello", 2),
+        ("rect", 3, 4, 5, 6, True),
+    ]
+
+
+def test_dashboard_renderer_creates_draw_commands():
+    from hardware.display import Display
+    from ui.dashboard_view_model import DashboardViewModel
+    from ui.renderers import DashboardRenderer
+
+    state = AppState()
+    state.update_from_status({
+        "battery": {
+            "soc": 82,
+            "voltage": 13.2,
+            "current": -6.4,
+            "runtime_hours": 12.0,
+        },
+        "temps": {
+            "fridge_zone_1": 34.5,
+            "fridge_zone_2": 36.0,
+        },
+        "relays": {
+            "starlink": False,
+            "fridge": True,
+        },
+        "network": {
+            "uart_connected": True,
+        },
+    })
+
+    display = Display()
+    renderer = DashboardRenderer(display)
+
+    renderer.render(DashboardViewModel(state))
+
+    assert display.commands[0] == ("clear",)
+    assert ("text", 0, 0, "SOC 82%", 1) in display.commands
+    assert ("text", 120, 0, "UART OK", 1) in display.commands
+    assert ("text", 0, 48, "Battery", 1) in display.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