android: the repair sheet, browse, every long-press sheet, You's last sections, the lyrics tools — and the walk's audio check made honest

The playlist repair (Find a local match: the library searched by the
row's name, a pick relinks it through playlist_relink_item; an unknown
row takes the track's identity). A peer's sheet on the raw results (play
or save the folder, browse their files, message, buddy) and the Browse
screen — the hub's Browse tab: a user's whole share with sizes and totals,
a folder played or saved whole; a share can hold thousands of folders, so
it filters and renders 80 at a time. "Look up a user" on Community →
Buddies. The sheets the phone lacked: a queue row's (Play now, Move to
next, Remove from queue), a catalog song's, a catalog card's and the
record page's own, a raw file's (in the results and in Browse), a room
name's, a buddy's, the now-playing Save (the desktop's Save menu for a
streamed track or record). The artwork viewer with pinch zoom, one layer
the back gesture peels. Search's recent searches and its spelling
suggestion from the names this phone knows. You → Streaming, Downloads,
Sharing, Lyrics, Album artwork, and Clear play history; a record's
Re-fetch the cover. The lyrics tools on the sheet's face: the offset
nudged and kept per track, another LRCLIB candidate chosen, the lookup
forgotten and done again (lyrics.svelte.js, shared by the face and the
lyrics sheet).

The harness: every CDP call times out and the reload step re-attaches
(a WebView that stopped answering hung a walk for ten minutes); the
audio check counts SoulStream's own tracks' underruns from the mixer dump
instead of the thread-wide counters that any app's notification moves —
the afternoon's "dropouts" were other apps' sounds, and the browse of a
49,544-file share measured at zero; __settle resets every tab to its root
through the nav; an adb step kind; the walks cover all of the above on
the mock and on the phone.

tests/mobile/cdp.mjs

@@ -54,10 +54,17 @@ export class CDP {
         throw new Error("could not attach to the page on port " + port
             + (phone ? " (a WebView in the background does not answer; is SoulStream on screen?)" : ""));
     }
-    send(method, params = {}) {
+    /* a page that never answers (frozen, or replaced by a reload) must fail
+       the call, not the whole walk */
+    send(method, params = {}, timeoutMs = 45000) {
         const id = ++this.id;
         this.ws.send(JSON.stringify({ id, method, params }));
-        return new Promise((res) => this.waits.set(id, res));
+        return new Promise((res, rej) => {
+            const t = setTimeout(() => {
+                if (this.waits.delete(id)) rej(new Error("the page did not answer " + method + " in " + Math.round(timeoutMs / 1000) + "s — a frozen or replaced WebView?"));
+            }, timeoutMs);
+            this.waits.set(id, (m) => { clearTimeout(t); res(m); });
+        });
     }
     async evaluate(expr) {
         const r = await this.send("Runtime.evaluate", { expression: expr, awaitPromise: true, returnByValue: true });