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.

src/mobile/Mobile.svelte

@@ -15,6 +15,7 @@
     import Cover from "./Cover.svelte";
     import Sheet from "./Sheet.svelte";
     import HalfSheet from "./HalfSheet.svelte";
+    import Viewer from "./Viewer.svelte";
     import Home from "./screens/Home.svelte";
     import Search from "./screens/Search.svelte";
     import Library from "./screens/Library.svelte";
@@ -23,6 +24,7 @@
     import CatalogAlbum from "./screens/CatalogAlbum.svelte";
     import Playlist from "./screens/Playlist.svelte";
     import Import from "./screens/Import.svelte";
+    import Browse from "./screens/Browse.svelte";
     import Community from "./screens/Community.svelte";
     import Room from "./screens/Room.svelte";
     import Thread from "./screens/Thread.svelte";
@@ -68,6 +70,7 @@
             case "you": return { title: "You", kicker: "You" };
             case "transfers": return { title: "Transfers", kicker: "Downloads" };
             case "import": return { title: "Import", kicker: importer.draft?.source_name || "Playlist" };
+            case "browse": return { title: e.c.username, kicker: "Their files" };
             case "album": {
                 const a = albumById(e.c.id);
                 return { title: a?.title ?? "", kicker: a?.artist ?? "", amb: a?.art_path ?? null, flush: true };
@@ -224,6 +227,8 @@
                         <Playlist id={entry.c.id} />
                     {:else if entry.n === "import"}
                         <Import />
+                    {:else if entry.n === "browse"}
+                        <Browse username={entry.c.username} />
                     {:else if entry.n === "community"}
                         <Community {entry} {screenEl} />
                     {:else if entry.n === "room"}
@@ -285,6 +290,7 @@
     <div class="scrim" class:on={!!nav.half} onclick={closeHalf} role="presentation"></div>
     <HalfSheet />
     <Sheet />
+    <Viewer />
 
     {#if player.error || lib.error}
         <div class="toast" onclick={() => { player.error = ""; lib.error = ""; }} role="status">{player.error || lib.error}</div>