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-r33-fmtcount.txt

@@ -0,0 +1,4 @@
+
+/** "1.2M", "430k" — a listener or play count beside a row, the desktop's
+ *  short form. Nothing under a thousand is abbreviated. */
+export const fmtCount = (n) => (!n ? "" : n >= 1e6 ? (n / 1e6).toFixed(1).replace(/\.0$/, "") + "M" : n >= 1e3 ? Math.round(n / 1e3) + "k" : String(n));