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/tools/realign-future6.cjs

@@ -0,0 +1,30 @@
+// Bring the wave-six snapshot in line with round 40's corrected background
+// check (a ten-second background window can legitimately cross a track
+// boundary, which is playback continuing, not playback stopping).
+const fs = require('fs');
+const f = process.argv[process.argv.length - 1] + '/tests/mobile/smoke.mjs';
+let s = fs.readFileSync(f, 'utf8');
+const done = [];
+
+const a1 = `            const posBefore = (await cdp.evaluate(PLAYER))?.pos ?? 0;
+            cdp.close();`;
+const b1 = `            const bgBefore = await cdp.evaluate(PLAYER);
+            const posBefore = bgBefore?.pos ?? 0;
+            cdp.close();`;
+if (s.includes(a1)) { s = s.replace(a1, () => b1); done.push('posBefore'); }
+
+const a2 = `            const posAfter = (await cdp.evaluate(PLAYER))?.pos ?? 0;
+            const bgOk = stillPlaying && posAfter >= posBefore + 8;
+            if (!bgOk) problems.push("EXPECT background " + JSON.stringify({ posBefore, posAfter, stillPlaying }));
+            console.log((bgOk ? "  ok  " : " FAIL ") + "background".padEnd(16) + " " + JSON.stringify({ posBefore, posAfter, stillPlaying }));`;
+const b2 = `            const bgAfter = await cdp.evaluate(PLAYER);
+            const posAfter = bgAfter?.pos ?? 0;
+            const crossed = !!(bgBefore && bgAfter && bgBefore.title !== bgAfter.title);
+            const bgOk = stillPlaying && (crossed || posAfter >= posBefore + 8);
+            const bgSeen = { posBefore, posAfter, stillPlaying, crossed, from: bgBefore?.title ?? null, to: bgAfter?.title ?? null };
+            if (!bgOk) problems.push("EXPECT background " + JSON.stringify(bgSeen));
+            console.log((bgOk ? "  ok  " : " FAIL ") + "background".padEnd(16) + " " + JSON.stringify(bgSeen));`;
+if (s.includes(a2)) { s = s.replace(a2, () => b2); done.push('bgOk'); }
+
+fs.writeFileSync(f, s);
+console.log('realigned: ' + (done.join(', ') || 'nothing to do'));