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-stamp.txt

@@ -0,0 +1,11 @@
+
+/** "4:31", "1:02:07" — a length or a position in MILLISECONDS, which is how
+ *  a playlist row's cue and an import draft's track both carry one. Hours
+ *  only when there are hours; `mmss` above is the seconds-in version. */
+export function stamp(ms) {
+    const s = Math.floor((ms || 0) / 1000);
+    const h = Math.floor(s / 3600);
+    const m = Math.floor((s % 3600) / 60);
+    const sec = s % 60;
+    return (h ? h + ":" + String(m).padStart(2, "0") : String(m)) + ":" + String(sec).padStart(2, "0");
+}