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-r32-slsk-on.txt

@@ -0,0 +1,13 @@
+    const subs = [];
+    const pending = [];
+    /* Tauri's `listen` is an invoke like any other, so eight of them one
+       behind the other is eight bridge round trips each waiting on the one
+       before. They never depended on one another: all eight go out at once
+       and the wait happens once, at the end. The ordering that does matter
+       is kept — bindSlsk still does not return until every handler is
+       registered, so connectStored() cannot let a fast `connected` land
+       with nobody listening. */
+    const on = (name, fn) => {
+        pending.push(listen(name, (ev) => fn(ev.payload)).then((u) => { subs.push(u); }, () => { /* not a phone */ }));
+    };
+    on("soulseek:state", (ev) => {