android: the library's file stats on the cards, the artist's own plays, the thumbnail prewarm

The desktop Library's per-record file stats on the phone (library_album_stats,
one call for the whole library): FLAC 24/96 or MP3 320k badges on the cards,
the size on the list rows and the record page. The artist page's own
listening (artist_play_stats): the time played as a chip, the most played
track under "On this phone". The whole-library thumbnail warm a moment after
boot, at the cards' edge, one decode at a time behind the tiles' gate.

tests/mobile/smoke.mjs

@@ -122,6 +122,8 @@ const PROBE = `(function () {
         brwDirs: document.querySelectorAll('.brw-dir').length,
         qrows: document.querySelectorAll('.q-face .row').length,
         viewer: !!document.querySelector('.viewer img'),
+        fmtBadges: document.querySelectorAll('.grid2 .release .ed-badge').length,
+        played: (document.querySelector('.hero-acts .stats .played') || {}).textContent || '',
         lyrLines: document.querySelectorAll('.lyr .ln').length,
         sheetTitle: (document.querySelector('.halfsheet .sheet-title') || {}).textContent || '',
         recents: document.querySelectorAll('.recent-chips .chip').length,
@@ -386,7 +388,7 @@ const MOCK_EXPECT = {
     "search-dym": (i) => i.dym === "shpongle",
     "search-dym-pick": (i) => i.sq === "shpongle" && !i.dym,
     search: (i) => i.title.startsWith("Search"),
-    library: (i) => i.title.startsWith("Your library"),
+    library: (i) => i.title.startsWith("Your library") && i.fmtBadges >= 10,
     album: (i) => i.screen.includes("tr-push") && !i.mini,
     lyrics: (i) => i.sheet.includes("up") && i.lyrLines >= 3,
     "lyrics-sheet": (i) => i.half.includes("up") && /Lyrics later/.test(i.halfText) && /Search again/.test(i.halfText),
@@ -399,7 +401,7 @@ const MOCK_EXPECT = {
     "track-sheet": (i) => i.half.includes("up"),
     sheet: (i) => i.sheet.includes("up"),
     "after-back": (i) => !i.sheet.includes("up"),
-    artist: (i) => i.screen.includes("has-hero") && i.amb.includes("on:img"),
+    artist: (i) => i.screen.includes("has-hero") && i.amb.includes("on:img") && /played/.test(i.played),
     queue: (i) => { globalThis.__qrows = i.qrows; return i.sheet.includes("up") && i.qrows >= 2; },
     "queue-row-sheet": (i) => i.half.includes("up") && /Remove from queue/.test(i.halfText) && /Play now/.test(i.halfText),
     "queue-removed": (i) => !i.half.includes("up") && i.qrows === globalThis.__qrows - 1,