fix(web-ui): restore home screen icon fixes on feat/playout-mcr

playout tile: monitor -> signal, dashboard tile: home -> layout.
All feature-branch content (Dragon-ISO, tagline, etc.) preserved.

services/web-ui/public/screens-home.jsx

@@ -66,7 +66,7 @@ function Home({ navigate }) {
     {
       id: 'playout',
       label: 'Playout',
-      icon: 'monitor',
+      icon: 'signal',
       tone: 'live',
       sub: 'Master Control',
       desc: 'Play assets to SDI, NDI, SRT or RTMP via CasparCG.',
@@ -154,7 +154,7 @@ function Home({ navigate }) {
             onClick={() => navigate('dashboard')}
           >
             <span className="launcher-tile-icon">
-              <Icon name="home" size={22} />
+              <Icon name="layout" size={22} />
             </span>
             <span className="launcher-tile-label">Dashboard</span>
             <span className="launcher-tile-sub">Operations view</span>