Sum a subscription's counts from the feeds it holds

An OPML folder has no entries of its own, so its row always showed zero
unread however much was waiting inside. Summed from every feed it holds
-- not just the ones a filter left showing, so the count doesn't move as
you type -- with the badge capped at 999+ so a four-digit number doesn't
eat the title beside it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AdXho5tTkjFLeUXKbEjKBh

web/index.html

@@ -457,6 +457,13 @@ function renderFeeds(){
   }
   for(const [f,depth] of order){
     const kids=shown.filter(c=>c.group===f.id).length;
+    // A subscription holds no entries itself, so its counts are the sum of what is inside --
+    // taken from every feed it holds, not just the ones a filter left showing.
+    const mine=S.feeds.filter(c=>c.group===f.id);
+    const sum=k=>mine.reduce((n,c)=>n+(c[k]||0),0);
+    const [unread,eps,saved]=mine.length
+      ? [sum('unread'),sum('entries'),sum('downloaded')]
+      : [f.unread,f.entries,f.downloaded];
     const el=document.createElement('div');
     el.className='feed'+(S.feed===f.id?' sel':'')+(depth?' child':'')+(kids?' group':'');
     const open = kids && (expanded.has(f.id) || q);
@@ -464,11 +471,11 @@ function renderFeeds(){
       `<span class="chev${open?' open':''}"${kids?' title="Show or hide the feeds inside"':''}>${kids?'▶':''}</span>`+
       artHTML(f.image,f.title||f.id)+
       `<div class="txt"><b>${esc(f.title||f.id)}</b><small>`+
-      (kids?`${kids} feed${kids===1?'':'s'}${f.unread?` · ${f.unread} unread`:''}`
-          :`${f.entries} eps · ${f.downloaded} saved`)+
+      (mine.length?`${mine.length} feed${mine.length===1?'':'s'} · ${saved} saved`
+          :`${eps} eps · ${saved} saved`)+
       `</small></div>`+
       (f.orphaned?'<span class="tag" title="No longer listed in the OPML, kept because it has downloads">gone</span>':'')+
-      `<span class="badge${f.unread?'':' zero'}">${f.unread}</span>`;
+      `<span class="badge${unread?'':' zero'}" title="${unread} unread">${unread>999?'999+':unread}</span>`;
     el.onclick=()=>{ selectFeed(f.id); $('#sidebar').classList.remove('open'); };
     if(kids) $('.chev',el).onclick=ev=>{ ev.stopPropagation(); toggleGroup(f.id); };
     list.appendChild(el);