hold marker in the theme engine, status badges on app icons

Any control with a press-and-hold action now shows it: a corner peel on Tactile and
Keycap that opens while held, a dot on Flat. Working/partial/broken badges moved onto
the app icon. Spotify and Deezer are marked partial since they need opening on the phone.

.gitignore

@@ -18,6 +18,7 @@ keystore.properties
 /docs/cert-sweep.sh
 extraction/
 /cloned-repos
+docs-internal/
 
 # Internal
 *.pdf
@@ -30,3 +31,6 @@ CLAUDE.md
 
 # Other
 archive/
+
+# Side project notes, kept out of the repo
+backseat-jury.md