feat(wails): set sfxkeeb branding and keycap app icon

Regenerate platform build assets from config.yml so the app shows as
sfxkeeb in dock, about, and installers. Replace the default Wails icon
with the keycap/speaker artwork and rebuild macOS Assets.car.

Co-authored-by: Cursor <cursoragent@cursor.com>

build/appicon.icon/Assets/wails_icon_vector.svg

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg width="100%" height="100%" viewBox="0 0 583 533" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" xmlns:serif="http://www.serif.com/" style="fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;">
-    <g transform="matrix(1,0,0,1,-246,-251)">
-        <g id="Ebene1">
-            <path d="M246,251L265,784L401,784L506,450L507,450L505,784L641,784L829,251L682,251L596,567L595,567L596,251L478,251L378,568L391,251L246,251Z"/>
-        </g>
-    </g>
-</svg>