Make page swipes smooth and give lights a new colour card (0.2.42)

Page switches show the new page as empty cards at once and draw two cards per
LVGL refresh, so touch is polled between the steps; on the Guition the longest
loop gap during a swipe dropped from 276 to 74 ms (docs/SWIPE_PROFILE.md).
Custom parts and control panels are reused instead of rebuilt, state updates
and ticks redraw only their own card, clocks redraw once a minute, and a swipe
past the last page draws nothing.

Slider handles sit inside the fill (grey when the card is off), the busy sheet
covers the whole card, and the light colour card is redesigned with rounded
tracks and colour knobs. Firmware 0.2.36; SWIPE_PROFILE builds carry a
per-swipe profiler for measurements.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

screen_manager/app/core.py

@@ -17,7 +17,7 @@ WEEKDAYS = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su']
 REPO = 'https://github.com/MaxGramser/homeassistant_espscreen'
 REFS = {'cyd': 'main', 'guition': 'main'}
 # Firmware shipped with this app release; screens below it get an update offer.
-FIRMWARE_VERSION = '0.2.35'
+FIRMWARE_VERSION = '0.2.36'
 ATTRS = frozenset('brightness percentage current_position current_temperature temperature current_humidity min_temp max_temp target_temp_step supported_color_modes hvac_modes hvac_action hs_color color_temp_kelvin min_color_temp_kelvin max_color_temp_kelvin fan_speed_list unit_of_measurement battery_level fan_speed volume_level is_volume_muted media_title options min max step temperature_unit supported_features device_class next_rising next_setting finishes_at duration remaining humidity wind_speed wind_speed_unit apparent_temperature fan_modes swing_modes fan_mode swing_mode'.split())
 # Attributes whose boolean value the screen needs; every other bool stays behind.
 BOOL_ATTRS = frozenset(['is_volume_muted'])