Signals back on the accent tint, their icon or initials in orange (#268)

A solid orange tile was too loud. Each Signal's tile is the folder's
accent tint again, and its icon or initials are drawn in the orange of
the Signals icon's point: #ff6a1a in dark. In light it is the light
palette's needle, #c43e00, since signals.svg's #ff5500 on the tint is
about 2:1, too faint for initials (about 3.4:1 instead).

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

web/src/signals.ts

@@ -34,9 +34,9 @@ function feedRow(id: string, cls: string, html: string, open: ()=>void){
 /// takes nothing else either).
 const ICON_ID=/^(solid|regular|brands)\/[a-z0-9-]{1,64}$/;
 const iconHTML=(icon: string)=>`<span class="ficon" style="--icon:url('/icons/${icon}.svg')"></span>`;
-/// Every Signal on the orange of the folder icon's point (.art.sig), icon or initials: tinted by a
-/// hash of its name, as a feed without art is, one came out a colour of its own for no reason
-/// anyone could see (#262).
+/// Every Signal in the folder's accent tint, its icon or initials in the orange of the folder icon's
+/// point (.art.sig): tinted by a hash of its name, as a feed without art is, one came out a colour
+/// of its own for no reason anyone could see (#262).
 function signalTile(sg: {name: string, icon: string|null}){
   const inner=sg.icon&&ICON_ID.test(sg.icon) ? iconHTML(sg.icon) : esc(initials(sg.name));
   return `<div class="art ini sig">${inner}</div>`;