android: the nav's badges — transfers in flight on You, unread chats on Community

The desktop's title-bar download ring and its unread indicator, on the
phone's nav: a count on You while Save is fetching, a count on Community
when a chat has unread lines.

tests/mobile/smoke.mjs

@@ -116,6 +116,7 @@ const PROBE = `(function () {
         rooms: document.querySelectorAll('.screen button.row .art.hash').length,
         jump: document.querySelectorAll('.screen .rail .release').length,
         countline: (document.querySelector('.countline .t-sub') || {}).textContent || '',
+        navBadges: [].map.call(document.querySelectorAll('.nav .nb'), function (b) { return b.textContent.trim(); }).join('|'),
         firstBadge: (document.querySelector('.grid2 .release .ed-badge') || {}).textContent || '',
         plthumbs: document.querySelectorAll('.pl-rows .thumb img').length,
         imp: document.querySelectorAll('.imp-rows .trk').length,
@@ -465,7 +466,7 @@ const MOCK_EXPECT = {
     "cat-album-sheet": (i) => i.half.includes("up") && /Save to library/.test(i.halfText) && /Add to playlist/.test(i.halfText) && /Go to artist/.test(i.halfText),
     "cat-track-sheet": (i) => i.half.includes("up") && /Save to library/.test(i.halfText),
     "cat-track-save": (i) => /Saving from /.test(i.halfText) || !i.half.includes("up"),
-    "cat-album-save": (i) => /^Saving \d+ from /.test(i.save),
+    "cat-album-save": (i) => /^Saving \d+ from /.test(i.save) && /^\d+$/.test(i.navBadges),
     transfers: (i) => i.title.startsWith("Transfers") && i.xfers >= 11,
     gaps: (i) => i.title.startsWith("Your library") && i.gaplines >= 1,
     "gaps-open": (i) => i.gapCards >= 3,