icons: PNGs for the installed app (separate any / maskable entries), SVG keeps explicit size; desktop PWA icon was clipped

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K6897PWcUEwHiqZMcVnNF6

favicon.svg

@@ -1,4 +1,4 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 64 64">
   <style>line{stroke:#ededf0}@media (prefers-color-scheme:light){line{stroke:#17171a}}</style>
   <g transform="translate(32 32)" stroke-width="9" stroke-linecap="butt">
     <line x1="0" y1="-27" x2="0" y2="27"/>