Add Pico touch routing abstraction

tests/test_pico_core.py

@@ -668,3 +668,57 @@ def test_buzzer_updates_from_alarm_view():
 
     assert buzzer.enabled is False
     assert buzzer.pattern is None
+
+
+def test_touch_controller_reads_event():
+    from hardware.touch import TouchController
+
+    class FakeTouchDevice:
+        def read(self):
+            return {"x": 100, "y": 200, "pressed": True}
+
+    controller = TouchController(FakeTouchDevice())
+    event = controller.read_event()
+
+    assert event.x == 100
+    assert event.y == 200
+    assert event.pressed is True
+
+
+def test_touch_router_bottom_nav_changes_screen():
+    from hardware.touch import TouchEvent
+    from ui.touch_router import TouchRouter
+
+    screens = ScreenManager()
+    router = TouchRouter(screens)
+
+    handled = router.handle_touch(TouchEvent(200, 460, True))
+
+    assert handled is True
+    assert screens.current_screen == "power"
+
+
+def test_touch_router_ignores_non_nav_touch():
+    from hardware.touch import TouchEvent
+    from ui.touch_router import TouchRouter
+
+    screens = ScreenManager()
+    router = TouchRouter(screens)
+
+    handled = router.handle_touch(TouchEvent(200, 200, True))
+
+    assert handled is False
+    assert screens.current_screen == "dashboard"
+
+
+def test_touch_router_ignores_unpressed_event():
+    from hardware.touch import TouchEvent
+    from ui.touch_router import TouchRouter
+
+    screens = ScreenManager()
+    router = TouchRouter(screens)
+
+    handled = router.handle_touch(TouchEvent(200, 460, False))
+
+    assert handled is False
+    assert screens.current_screen == "dashboard"