One Check every feed button: the top bar's (#416)

All Subscriptions' header had its own, beside Mark everything read, doing
what the top bar's Refresh does.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqkrVDqdiQEMWAkNGQ2tYA

web/src/feedpage.ts

@@ -62,7 +62,6 @@ function renderFeed(){
           subscribe to, newest first · ${unreadAll} unread</div>
       </div>
       <div class="acts">
-        <button class="btn ico" data-a="scanall" title="Check every feed now" aria-label="Check every feed now">${ICON.scan}</button>
         <button class="btn ico" data-a="readall" title="Mark everything read" aria-label="Mark everything read">${ICON.checks}</button>
       </div>
     </div>`) + `
@@ -182,7 +181,6 @@ async function feedAction(a: string,f: Feed){
 }
 /// All Subscriptions' own buttons: a feed's, across every feed you read.
 async function allAction(a: string){
-  if(a==='scanall') return scanAll();
   if(a==='readall'){
     const n=S.feeds.reduce((k,x)=>k+(x.unread||0),0);
     if(!n){ toast('Nothing unread'); return; }