🤖 Replace emoji with SVG icon for runtime badge

Replace 🖥️ emoji with a clean SVG server rack icon that matches
the app's visual style. Icon uses currentColor to inherit the
accent color from the badge.

Generated with `cmux`

Author: ammar-agent

src/components/RuntimeBadge.tsx

@@ -29,9 +29,23 @@ export function RuntimeBadge({ runtimeConfig, className }: RuntimeBadgeProps) {
           className
         )}
       >
-        <span className="text-[10px]" aria-label="SSH Runtime">
-          🖥️
-        </span>
+        <svg
+          width="12"
+          height="12"
+          viewBox="0 0 16 16"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="1.5"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+          aria-label="SSH Runtime"
+        >
+          {/* Server rack icon */}
+          <rect x="2" y="2" width="12" height="4" rx="1" />
+          <rect x="2" y="10" width="12" height="4" rx="1" />
+          <line x1="5" y1="4" x2="5" y2="4" />
+          <line x1="5" y1="12" x2="5" y2="12" />
+        </svg>
         <span className="truncate">{hostname}</span>
       </span>
       <Tooltip align="right">