Add Dark mode for a screen beside the bed, with every colour in one table (0.2.63)

Dark mode is a new switch under Brightness on the screen's settings page, in
the Screen settings of ESP Screens and as switch.<screen>_dark_mode in Home
Assistant, so an automation can turn it on at bedtime. The screen changes
look at once, open cards and an alert included, and keeps it after a
restart. The design stays the same: a black page, graphite cards with a
hairline, soft white text, Home Assistant's state colours where they tell
something, and pastel card colours as deeper versions of themselves.

Every colour the firmware chooses now lives in components/smart_display/
theme.h: roles with a light and a dark value, the named card colours and
Home Assistant's state colours. The board profiles give widgets colourless
shared styles that theme.h fills, so a change of look refills those styles
and draws again what code painted by state. The light look is unchanged
apart from merges below one panel step. Dark mode costs 440 bytes of static
RAM on the CYD, and the LVGL tree of the host build is 416 bytes smaller; tests
keep colours out of every other file.

Comparing a screen that switched looks with one that booted in it also
found two older bugs, now fixed: a settings switch that was on showed its
knob at the left whenever its page was drawn, and the sun card's sunlit
area turned orange after a palette change. Firmware 0.2.54.

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

screen_manager/app/claude_skill.py

@@ -15,7 +15,8 @@ import tile_icons
 from core import (ALERT_ENDINGS, ALERT_EVENT, ALERT_FALLBACK_ICON, ALERT_FIELDS, ALERT_LIMITS, ALERT_MAX_TIMEOUT,
                   ALERT_MIN_FIRMWARE, ALERT_SUGGESTED_ICONS, AUTO_STANDBY_MIN_FIRMWARE, BROADCAST_DISMISS, BROADCAST_SHOW,
                   CONTROLS, DISPLAYS, MAX_PAGES, SETTINGS_PAGE_MIN_FIRMWARE, SLOTS_PER_PAGE, TILE_BACKGROUNDS,
-                  TILE_EVENTS, TILE_RESULT_EVENT, WAKE_SLEEP_MIN_FIRMWARE, SETTING_ENTITIES_MIN_FIRMWARE)
+                  TILE_EVENTS, TILE_RESULT_EVENT, WAKE_SLEEP_MIN_FIRMWARE, SETTING_ENTITIES_MIN_FIRMWARE,
+                  DARK_MODE_MIN_FIRMWARE)
 
 NAME = 'esp-screens'
 # claude.ai accepts at most 200 characters; Claude Code picks the skill by this sentence.
@@ -263,6 +264,7 @@ Every screen has these entities in Home Assistant, on its ESPHome device. `<scre
 | `number.<screen>_normal_brightness` | Brightness while in use, 5 to 100 %. |
 | `number.<screen>_standby_brightness` | Brightness in standby, 0 to 100 %, at most the normal brightness. |
 | `number.<screen>_night_brightness` | Brightness in standby during the night hours, 0 to 100 %. |
+| `switch.<screen>_dark_mode` | On: the dark look, a black page with graphite cards and soft white text, for a screen beside a bed or in a dark room. Off: the light look. Firmware {DARK_MODE_MIN_FIRMWARE} or newer. |
 | `switch.<screen>_night_mode` | Night mode: the night brightness between the two times below. Firmware {SETTING_ENTITIES_MIN_FIRMWARE} or newer, like every row below it. |
 | `time.<screen>_night_starts`, `time.<screen>_night_ends` | The night hours; set them with `time.set_value`. |
 | `switch.<screen>_24_hour_clock` | On: 24-hour clock. Off: 12-hour clock. |
@@ -342,11 +344,36 @@ actions:
 
 Replace the person, light, window and screen with the real entity IDs (ask which screens when there are several), and leave out conditions the user did not ask for.
 
+Dark mode follows the same pattern: switch it on and off from an automation, for example at bedtime and in the morning, or with the sun. It changes the colours only, never the tiles or the brightness; lower the brightness with the numbers above.
+
+```yaml
+alias: Bedroom screen dark at night
+triggers:
+  - trigger: time
+    at: "21:30:00"
+    id: night
+  - trigger: time
+    at: "07:00:00"
+    id: day
+actions:
+  - if:
+      - condition: trigger
+        id: night
+    then:
+      - action: switch.turn_on
+        target:
+          entity_id: switch.bedroom_screen_dark_mode
+    else:
+      - action: switch.turn_off
+        target:
+          entity_id: switch.bedroom_screen_dark_mode
+```
+
 ## The settings page on the screen itself
 
 Firmware {SETTINGS_PAGE_MIN_FIRMWARE} or newer carries a settings page the user can open at the panel: hold the top bar (the strip with the screen's name and the clock) for about a second and a half, until the blue line along the top edge is full. A screen can also carry a tile for it: put the entity `screen.settings` on a screen like any other tile.
 
-It holds Brightness, Night, Screen (clock, going back to page 1, swiping, rotation) and This screen (name, address, firmware, whether Home Assistant is connected, and Restart). A change there is saved on the screen and shows up in ESP Screens within a second, exactly like a change made from Home Assistant.
+It holds Brightness (with Dark mode), Night, Screen (clock, going back to page 1, swiping, rotation) and This screen (name, address, firmware, whether Home Assistant is connected, and Restart). A change there is saved on the screen and shows up in ESP Screens within a second, exactly like a change made from Home Assistant.
 
 You can open it for someone who is standing at the panel: