Clear screen area in Rion frame image to transparent

Makes the 320x240 screen cutout at offset (76,62) transparent,
matching the Orion frame style so the page background color
shows through correctly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app_state.py

@@ -8,7 +8,7 @@ so later rebinding would only ever be seen by the module that did it.
 import configparser
 import os
 
-VERSION = "0.0.0.122"
+VERSION = "0.0.0.123"
 PROPERTIES_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "editor.properties")
 DEFAULT_GRID_SIZE = 10
 DEFAULT_ADD_TIMESTAMP = True