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-r46-js-mirror.txt

@@ -0,0 +1,9 @@
+    /* what was SENT, recorded before the call and whether or not it lands —
+       a desktop build and the mock both reject it, and neither is a reason
+       to forget what the window looked like */
+    mediacard.updates++;
+    mediacard.window = state.queue.length;
+    mediacard.index = state.queueIndex ?? -1;
+    mediacard.art = state.queue.filter((q) => !!q.artKey).length;
+    mediacard.at = state.queueIndex == null ? "" : (state.queue[state.queueIndex].title || "");
+    await invoke("plugin:media-session|update", { state }).catch(() => {});