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-r28-toasts.txt

@@ -0,0 +1,13 @@
+    <!-- the announcement: one node, always here, so a change of its words
+         is what gets read out. The toasts below stay where they were and
+         say nothing on their own — two announcers say everything twice -->
+    <div class="sr-live" data-live aria-live="polite" aria-atomic="true">{announce}</div>
+    {#if player.error || lib.error}
+        <div class="toast" onclick={() => { player.error = ""; lib.error = ""; }} role="button" tabindex="0" onkeydown={() => {}} aria-label="Dismiss this message">{player.error || lib.error}</div>
+    {/if}
+    {#if notice.text}
+        <div class="toast notice">
+            <span class="nt" aria-hidden="true">{notice.text}</span>
+            {#if notice.action}<button class="na" onclick={() => { const f = notice.action.fn; clearNote(); f?.(); }}>{notice.action.label}</button>{/if}
+        </div>
+    {/if}