Draw every Directory category tile on the panel, untinted (#131)

Each tile took a faint tint from a hash of its category's name, as an initials tile does, so
neighbours differed. Five of them, Comedy, Government, Kids & Family, Leisure and Music, drew
--good, and green means yours everywhere else on the page, the subscribed tick and a downloaded
file among them: those tiles read as holding something you subscribe to, when the tint meant
nothing. The fanned covers already give each tile its colour.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/dialogs.ts

@@ -217,7 +217,7 @@ function catTile(c,name,count,rows){
   // Covers before initials, which are all Other had; the likeliest first, and first is in front:
   // the fan is drawn back to front.
   const art=[...rows].sort((a,b)=>Number(!a.image)-Number(!b.image)||bySubs(a,b)).slice(0,3).reverse();
-  return `<button type="button" class="cat" data-go="${esc(c)}" style="--tint:${tint(c)}"><b>${esc(name)}</b><small>${count}</small>`+
+  return `<button type="button" class="cat" data-go="${esc(c)}"><b>${esc(name)}</b><small>${count}</small>`+
     `<span class="fan" aria-hidden="true">${art.map(p=>artHTML(p.image,NAME(p))).join('')}</span></button>`;
 }