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-r30-css.txt

@@ -0,0 +1,8 @@
+/* the measured vocal band under the head: where the singing is, the lines
+   that already have a time, and the playhead over both */
+.sy-strip { position: relative; display: flex; align-items: flex-end; gap: 1px; height: 40px; margin: 8px var(--pad) 0; padding: 0 2px; border-radius: 8px; background: rgba(255, 255, 255, 0.04); flex: none; overflow: hidden; }
+.sy-col { flex: 1; min-width: 0; border-radius: 1px; background: color-mix(in srgb, var(--accent) 55%, transparent); }
+.sy-tick { position: absolute; top: 0; bottom: 0; width: 2px; margin-left: -1px; background: #fff; opacity: 0.75; }
+.sy-play { position: absolute; top: -2px; bottom: -2px; width: 2px; margin-left: -1px; background: var(--accent-hover); box-shadow: 0 0 8px var(--accent-hover); }
+.sy-est { align-self: center; margin: 8px 0 0; padding: 7px 16px; border-radius: var(--r-pill); font-size: 12.5px; font-weight: 750; color: var(--accent-hover); background: color-mix(in srgb, var(--accent) 14%, transparent); flex: none; }
+.sy-est:disabled { opacity: 0.45; color: var(--text-muted); background: rgba(255, 255, 255, 0.05); }