Show the screens and ESP Screens in the README; firmware 0.2.35 to test updates (0.2.41)

- README: photos of a Guition at home, both boards with demo layouts, a card gallery,
  the alert with the Alerts cheatsheet, New screen and choosing tiles, tile settings next
  to the resulting tile, and the top bar sheet. Screen images are rendered from the
  firmware's own LVGL code (ESPHome host + SDL) fed by the app's own messages on a demo home.
- App store page (screen_manager/README.md): a photo and the editor via absolute URLs.
- Firmware 0.2.35 only raises SCREEN_FIRMWARE_VERSION so the update path can be tested.

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

packages/cyd.yaml

@@ -58,7 +58,7 @@
 ############################################################
 
 substitutions:
-  SCREEN_FIRMWARE_VERSION: "0.2.34"
+  SCREEN_FIRMWARE_VERSION: "0.2.35"
   # A tap survives a finger that drifts up to this far (320 px over 58 mm: 1 cm); further is a swipe.
   TOUCH_MOVE_LIMIT_PX: "56"
   # Shortest contact that counts as a tap; a resistive panel bounces, a capacitive one does not.

packages/guition.yaml

@@ -2,7 +2,7 @@
 # Guition ESP32-S3-4848S040 / 4-inch EU wallbox, 480x480 IPS + GT911.
 # Use guition-device.yaml; see docs/GUITION.md. CYD hardware is a separate profile.
 substitutions:
-  SCREEN_FIRMWARE_VERSION: "0.2.34"
+  SCREEN_FIRMWARE_VERSION: "0.2.35"
   # 0: no drift limit; LVGL decides, releasing inside the tile is a tap, leaving it is not
   # (like iOS). The CYD keeps a limit because its resistive panel jumps.
   TOUCH_MOVE_LIMIT_PX: "0"