feat(wails): set sfxkeeb branding and keycap app icon

Regenerate platform build assets from config.yml so the app shows as
sfxkeeb in dock, about, and installers. Replace the default Wails icon
with the keycap/speaker artwork and rebuild macOS Assets.car.

Co-authored-by: Cursor <cursoragent@cursor.com>

build/linux/desktop

@@ -1,7 +1,7 @@
 [Desktop Entry]
 Version=1.0
-Name=My Product
-Comment=A sfxkeeb application
+Name=sfxkeeb
+Comment=Annotate keyboard key presses on a video timeline
 # The Exec line includes %u to pass the URL to the application
 Exec=/usr/local/bin/sfxkeeb %u
 Terminal=false