Homepage icons: clean white with gold hover

Removed gold outline/stroke from default state - too harsh on
some monitors. Now simple white icons that turn gold on hover
like the header nav, with lift effect and drop shadow.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontends/web/templates/index.html

@@ -17,7 +17,6 @@
     color: #fff;
     margin-bottom: 0.5rem;
     filter: drop-shadow(0 3px 2px rgba(0, 0, 0, 0.9));
-    -webkit-text-stroke: 1px #8b6914;
     transition: all 0.15s ease;
 }
 .home-icon span {