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-mobile-script.txt

@@ -0,0 +1,24 @@
+
+    /* ── what the machine says ───────────────────────────────────────── */
+    /* A tab's own name: the section, and when the dot is up, what the
+       number counts. "You, 3 transfers" — not a stray 3 read out before
+       the word it belongs to. */
+    function tabCount(id) {
+        if (id === "you") return activeTransfers().length;
+        if (id === "community") return unreadTotal();
+        return 0;
+    }
+    function tabName(id, label) {
+        const n = tabCount(id);
+        if (!n) return label;
+        return label + ", " + n + (id === "you" ? " transfer" + (n === 1 ? "" : "s") : " unread");
+    }
+
+    /* The one live region. It is mounted for the life of the app on
+       purpose: a region that appears with its words already inside it is
+       announced reliably by neither TalkBack nor VoiceOver, so an
+       announcement here is a TEXT CHANGE in a node that was always there.
+       The desktop does the same (FollowToast's always-mounted .layer,
+       PreviewOverlay's .sr-announce). Never drawn — shell.css clips it to
+       a pixel. */
+    const announce = $derived([player.error || lib.error, notice.text, notice.action?.label].filter(Boolean).join(". "));