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/patch-round12.cjs

@@ -0,0 +1,38 @@
+// Round twelve: the desktop's whole-library thumbnail warm, on the phone —
+// a moment after boot, at the edge the cards paint (360), one decode at a
+// time behind the tiles' own gate, so a scroll through the library finds
+// every cover already cut.
+const fs = require('fs');
+const root = 'F:/Coding/SoulStream/';
+let p, s;
+const load = (file) => { p = file; s = fs.readFileSync(root + p, 'utf8'); };
+const save = () => fs.writeFileSync(root + p, s);
+const once = (a) => {
+    const i = s.indexOf(a);
+    if (i < 0) throw new Error('missing in ' + p + ': ' + a.slice(0, 90));
+    if (s.indexOf(a, i + 1) >= 0) throw new Error('ambiguous in ' + p + ': ' + a.slice(0, 90));
+    return i;
+};
+const rep = (a, b) => { once(a); s = s.replace(a, () => b); };
+
+load('src/mobile/Mobile.svelte');
+rep(`        bindImporter();
+        bindShare();`, `        bindImporter();
+        bindShare();
+        /* the desktop's library art prewarm: every cover cut to the cards'
+           edge, one decode at a time behind the tiles' gate, a moment after
+           boot so the first screen and a restored track come first */
+        setTimeout(() => { api.libraryArtPrewarm([360]).catch(() => {}); }, 8000);`);
+save();
+
+load('src/lib/mockLibrary.js');
+rep(`    if (cmd === "rescan_library") return Promise.resolve();`, `    if (cmd === "rescan_library") return Promise.resolve();
+    if (cmd === "library_art_prewarm") return Promise.resolve();`);
+save();
+
+load('ANDROID.md');
+rep(`The Library's cards wear the desktop's file stats`, `A moment after boot the phone warms the library's thumbnails the
+desktop's way (\`library_art_prewarm\` at the cards' edge, one decode at a
+time behind the tiles' gate). The Library's cards wear the desktop's file stats`);
+save();
+console.log('round twelve wired');