android: hours on the library's count line, By format, Jump back in on the empty search

The desktop Library summary's hours on the phone's count line; a By format
order from the file stats (lossless by depth and rate first, then by
bitrate, the badge as the card's line); the empty Search page's Jump back
in — the last records played — as the desktop's empty search shows them.

ANDROID.md

@@ -213,7 +213,9 @@ Save menu: Save to library (at once when the cache is byte-complete, else
 through the download pipeline) and Save this record for the streamed
 record the queue holds. A moment after boot the phone warms the library's thumbnails the
 desktop's way (`library_art_prewarm` at the cards' edge, one decode at a
-time behind the tiles' gate). The Library's cards wear the desktop's file stats (`library_album_stats`,
+time behind the tiles' gate). The Library's count line carries the collection's hours and the sort
+offers By format (lossless by depth and rate first, then by bitrate); the
+empty Search page shows Jump back in, the desktop's. The Library's cards wear the desktop's file stats (`library_album_stats`,
 one call for the whole library: FLAC 24/96, MP3 320k, the size on the
 list rows and the record page), and the artist page shows this phone's
 own listening (`artist_play_stats`: time played as a chip, the most

src/lib/mockLibrary.js

@@ -325,7 +325,7 @@ export function mockInvoke(cmd, args) {
     if (cmd === "app_status") return Promise.resolve({ version: "mock", connected_as: null });
     if (cmd === "library_albums") return Promise.resolve(albums);
     if (cmd === "library_album_stats") return Promise.resolve(albums.map(statsFor));
-    if (cmd === "recent_albums") return Promise.resolve([]);
+    if (cmd === "recent_albums") return Promise.resolve(albums.slice(0, 3).map((a, i) => ({ kind: "library", album_id: a.id, title: a.title, artist: a.artist, art_path: a.art_path, last_played_at: Math.floor(Date.now() / 1000) - 3600 * (i + 1) })));
     if (cmd === "album_tracks")
         return new Promise((r) => setTimeout(() => r(tracksFor(args.albumId)), 60));
     if (cmd === "album_art") {

src/mobile/HalfSheet.svelte

@@ -21,7 +21,7 @@
     import { note } from "./notice.svelte.js";
     import { fmtOf, albumFmt, fmtBytes, basename, dirname, longDur, mmss, titleFromName } from "./util.js";
 
-    const SORTS = [["added", "Recently added"], ["az", "A–Z"], ["artist", "By artist"], ["year", "By year"]];
+    const SORTS = [["added", "Recently added"], ["az", "A–Z"], ["artist", "By artist"], ["year", "By year"], ["format", "By format"]];
 
     /* the last sheet is kept through its slide down */
     let shown = $state(null);

src/mobile/screens/Library.svelte

@@ -18,7 +18,7 @@
     let { entry, screenEl = null } = $props();
 
     const TABS = [["albums", "Albums"], ["artists", "Artists"], ["tracks", "Tracks"], ["playlists", "Playlists"], ["gaps", "Gaps"]];
-    const SORTS = [["added", "Recently added"], ["az", "A–Z"], ["artist", "By artist"], ["year", "By year"]];
+    const SORTS = [["added", "Recently added"], ["az", "A–Z"], ["artist", "By artist"], ["year", "By year"], ["format", "By format"]];
 
     const tab = $derived(entry.c.tab || "albums");
     const sort = $derived(entry.c.sort || "added");
@@ -30,11 +30,25 @@
             if (sort === "az") return x.title.localeCompare(y.title);
             if (sort === "artist") return x.artist.localeCompare(y.artist) || (x.year || 0) - (y.year || 0);
             if (sort === "year") return (y.year || 0) - (x.year || 0) || y.added_at - x.added_at;
+            if (sort === "format") {
+                /* lossless first, then the higher bitrate, then the name */
+                const fx = fmtRank(lib.stats[x.id]);
+                const fy = fmtRank(lib.stats[y.id]);
+                return fy - fx || x.title.localeCompare(y.title);
+            }
             return y.added_at - x.added_at;
         });
         return l;
     });
     const totalTracks = $derived(lib.albums.reduce((n, a) => n + (a.track_count || 0), 0));
+    const totalSecs = $derived(Object.values(lib.stats).reduce((n, st) => n + (st.secs || 0), 0));
+    const hours = $derived(totalSecs >= 3600 ? Math.round(totalSecs / 3600) + " hours" : totalSecs ? Math.round(totalSecs / 60) + " min" : "");
+    /* By format: a number the sort can compare — lossless by depth and rate, lossy by bitrate */
+    function fmtRank(st) {
+        if (!st || !st.formats?.length) return 0;
+        if (st.bit_depth && st.sample_rate) return 1_000_000 + st.bit_depth * 1000 + Math.round(st.sample_rate / 1000);
+        return st.avg_kbps || 1;
+    }
     const arts = $derived(artists());
 
     /* ── Gaps — the desktop's (Library.svelte's gapSection): only a shelf
@@ -101,7 +115,7 @@
         {/each}
     </div>
     <div class="countline">
-        <span class="t-sub">{list.length} album{list.length === 1 ? "" : "s"} · {totalTracks} tracks</span>
+        <span class="t-sub">{list.length} album{list.length === 1 ? "" : "s"} · {totalTracks} tracks{hours ? " · " + hours : ""}</span>
         <button class="iconbtn sm muted" onclick={() => patch({ view: view === "grid" ? "list" : "grid" })} aria-label="Grid or list">
             <Icon name={view === "grid" ? "playlist" : "layers"} size={18} />
         </button>
@@ -111,7 +125,7 @@
     {:else if view === "grid"}
         <div class="grid2">
             {#each list as a (a.id)}
-                <Release title={a.title} sub={sort === "year" ? String(a.year || "") : a.artist} path={a.art_path} badge={statLabel(lib.stats[a.id]) || null} onclick={() => push("album", { id: a.id }, screenEl)} onmore={() => openHalf("album", { album: a })} />
+                <Release title={a.title} sub={sort === "year" ? String(a.year || "") : sort === "format" ? (statLabel(lib.stats[a.id]) || a.artist) : a.artist} path={a.art_path} badge={statLabel(lib.stats[a.id]) || null} onclick={() => push("album", { id: a.id }, screenEl)} onmore={() => openHalf("album", { album: a })} />
             {/each}
         </div>
     {:else}

src/mobile/screens/Search.svelte

@@ -292,6 +292,14 @@
         Artists, records and songs from the catalog; a song plays from the best copy the network has, a record opens its page.
         {#if !online}Sign in on Community to play what the library does not hold.{/if}
     </div>
+    {#if lib.recents.length}
+        <div class="sec"><h2>Jump back in <em>· picks up where you left off</em></h2></div>
+        <div class="rail">
+            {#each lib.recents.slice(0, 8) as r (r.album_id)}
+                <Release title={r.title} sub={r.artist} path={r.art_path} onclick={() => push("album", { id: r.album_id }, screenEl)} />
+            {/each}
+        </div>
+    {/if}
     {#if recents.length}
         <div class="sec"><h2>Recent</h2><button class="all" onclick={() => { recents = []; keepRecents(); }}>Clear</button></div>
         <div class="chips recent-chips" style="padding-bottom: 12px">

tests/mobile/smoke.mjs

@@ -114,6 +114,9 @@ const PROBE = `(function () {
         plcover: !!document.querySelector('.rec-head.pl .rec-cover img'),
         qfirst: (document.querySelector('.q-face .row .t') || {}).textContent || '',
         rooms: document.querySelectorAll('.screen button.row .art.hash').length,
+        jump: document.querySelectorAll('.screen .rail .release').length,
+        countline: (document.querySelector('.countline .t-sub') || {}).textContent || '',
+        firstBadge: (document.querySelector('.grid2 .release .ed-badge') || {}).textContent || '',
         plthumbs: document.querySelectorAll('.pl-rows .thumb img').length,
         imp: document.querySelectorAll('.imp-rows .trk').length,
         impTags: [].map.call(document.querySelectorAll('.imp-rows .tag'), function (t) { return t.textContent.trim(); }).join('|'),
@@ -164,6 +167,9 @@ const MOCK_STEPS = [
     { do: `(function () { var i = document.querySelector('.sfield input'); i.value = 'shpongel'; i.dispatchEvent(new Event('input', { bubbles: true })); })()`, name: "search-dym", wait: 900 },
     { do: `__click('.dym', null)`, name: "search-dym-pick", wait: 700 },
     { do: `document.querySelectorAll('.nav button')[2].click()`, name: "library", wait: 800 },
+    /* By format: the hi-res lossless records come first */
+    { do: `__click('.chips .chip', 'By format')`, name: "library-by-format", wait: 500 },
+    { do: `__click('.chips .chip', 'Recently added')`, wait: 400 },
     { do: `document.querySelectorAll('.segtabs button')[1].click()`, name: "artists", wait: 600 },
     { do: `document.querySelectorAll('.segtabs button')[2].click()`, name: "tracks", wait: 900 },
     { do: `document.querySelectorAll('.segtabs button')[0].click()`, wait: 300 },
@@ -398,7 +404,7 @@ const MOCK_EXPECT = {
     "you-artedge": (i) => i.artEdge === "1000 px",
     "history-confirm": (i) => i.half.includes("up") && /Clear the play history/.test(i.halfText),
     "history-cleared": (i) => !i.half.includes("up") && /history cleared/i.test(i.notice),
-    "search-recent": (i) => i.title.startsWith("Search") && i.recents >= 1,
+    "search-recent": (i) => i.title.startsWith("Search") && i.recents >= 1 && i.jump >= 1,
     "search-recent-pick": (i) => i.title.startsWith("Search") && (i.songs >= 4 || !!i.top),
     "sleep-sheet": (i) => i.half.includes("up"),
     "sleep-set": (i) => !i.half.includes("up"),
@@ -409,7 +415,7 @@ 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") && i.fmtBadges >= 10,
+    library: (i) => i.title.startsWith("Your library") && i.fmtBadges >= 10 && /hours/.test(i.countline),
     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),
@@ -464,6 +470,7 @@ const MOCK_EXPECT = {
     gaps: (i) => i.title.startsWith("Your library") && i.gaplines >= 1,
     "gaps-open": (i) => i.gapCards >= 3,
     playlists: (i) => i.title.startsWith("Your library") && i.plcards === 3 && i.plpinned,
+    "library-by-format": (i) => /^FLAC 24/.test(i.firstBadge),
     artists: (i) => i.title.startsWith("Your library") && i.rowArt >= 3,
     playlist: (i) => i.screen.includes("tr-push") && i.title.startsWith("Late night drive") && i.plrows === 6 && i.plthumbs >= 3 && /unresolved/.test(i.pltags) && /file missing/.test(i.pltags) && /^Playlist/.test(i.plkind) && /Pinned/.test(i.plkind) && i.plfilter,
     "playlist-playing": (i) => i.mini && i.playing.includes("Track 2") && !i.toast,