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-r50-walk-helper.txt

@@ -0,0 +1,33 @@
+/* Every browse the media service answered, as `LibraryBridge` logged it —
+ *  one line per node, in the order the browser asked for them.
+ *
+ *  Round fifty put the car's browse tree behind a read-only SQLite
+ *  connection in a process with NO Activity, no Tauri and no WebView, which
+ *  is the whole point of it: the tree has to be there before the app is.
+ *  That also means there is no screen to read it back from and no page to
+ *  ask, so logcat is the only place on the device this exists at all. `n`,
+ *  `br`, `pl`, `uniq`, `titled`, `art` and `fail` are the service's own
+ *  count of what it handed the browser; `ms` is measured inside the Rust
+ *  call and `hop` around the whole JNI round trip, so a gap between the two
+ *  is the bridge rather than the database. `note=` goes LAST because a
+ *  sqlite message may hold anything, spaces and `=` included.
+ *
+ *  A line that does not parse is simply not a row here, and every check
+ *  below fails on a row that is MISSING rather than on a sentinel — which
+ *  is why each of them names the node it wanted. */
+function autoNodes() {
+    try {
+        const out = adb("logcat", "-d", "-s", "SoulStream:D").toString();
+        const rows = [];
+        for (const line of out.split(/\r?\n/)) {
+            const m = line.match(/auto node=(\S+) n=(-?\d+) br=(-?\d+) pl=(-?\d+) uniq=(-?\d+) titled=(-?\d+) art=(-?\d+) fail=(-?\d+) lim=(-?\d+) open=(\S+) ms=(-?\d+) hop=(-?\d+) kinds=(\S*) note=(.*)$/);
+            if (!m) continue;
+            rows.push({
+                node: m[1], n: +m[2], br: +m[3], pl: +m[4], uniq: +m[5], titled: +m[6],
+                art: +m[7], fail: +m[8], lim: +m[9], open: m[10], ms: +m[11], hop: +m[12],
+                kinds: m[13], note: m[14].trim(),
+            });
+        }
+        return rows;
+    } catch { return []; }
+}