android: the handoff — the pending rounds, the pipeline, and what is unverified

Everything written this session that has not been through the device: rounds 43
to 48 (each patch adversarially verified, 43's transient-notice expectation
fixed), a partial round 49, the pipeline scripts, the Android Auto design and
the icon comparison mock. Also the two harness changes that were never A/B'd —
adaptive waits, which may only shorten a declared wait and never lengthen it,
and a ship that runs the mock walk and the deploy at the same time. The A/B and
its 255-step baseline are in handoff/tools; main stays at what the phone has
actually walked.

handoff/rounds/ins-r23-android.txt

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+The rest of the lyrics tools came with it. The sheet carries the per-track
+auto-sync switch (`lyrics_set_auto_sync`), so the timing correction the app
+makes from a file's own lead-in can be turned off for one recording and back
+on. "Re-time by hand" opens the tap-to-sync room (`SyncRoom.svelte`, one
+more layer the back gesture peels): the song plays, the line to time sits
+large in the middle of the screen with the one behind and the one ahead
+faint around it, and a tap anywhere stamps it — the last tap undone, −5 s
+and play/pause under the thumb, and Save writing the track's own document
+(`lyrics_save_lines`, the top of the waterfall, where a paste lands too).
+Lines never tapped are left out of it and the button says how many are kept;
+a set left mid-tap by the back gesture is offered back by the row that
+opened it. "Play with reduced vocals" is the desktop's offline DSP
+(`lyrics_prepare_instrumental` — a band-limited centre cancel, not a
+separator, and the wording stays honest about that): the copy plays under
+the same title, artist and duration, so the lyric identity is still the
+recording's and the words keep following it, and one row puts the original
+back.