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.

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">