Probed with the EXISTING build detector -- no new decoding. 24 disc archives
contain UI screen builds; the exporter reads one (dat/GP_TITLE.pak, hardcoded).
GP_OPTIONS has 14 builds, GP_SAVE_LOAD 18, GP_DIALOG 105, GP_TUTORIAL 2.
So LOAD GAME, TUTORIAL, OPTIONS and the NEW GAME difficulty chain are not blocked
on the Decoder and need no format work. They are an exporter scope limit, and the
exporter is the port's.
Prioritised by the filter adopted after the plate: 'if this is wrong, what does a
player experience?' Four dead menu entries beat an audio level, which beats
timing minutiae.
Flagged as NOT established: that the screens render (is_build says the record
parses, not that sprites resolve or names are known), which GP_DIALOG entry is
the difficulty dialog, and that more screens are free -- every one joins
check-all's per-screen comparisons and needs a naming decision.
Next unit widens to GP_OPTIONS only. Not all four: 139 new screens at once would
make any regression unattributable.