Move AC shield next to initiative and refine shield style

Place AC between initiative and name to group static reference
stats on the left, leaving HP as the sole dynamic element on
the right. Dim the shield outline to 40% opacity so it recedes
visually, and nudge the number up 2px toward the visual center.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/components/ac-shield.tsx

@@ -24,12 +24,12 @@ export function AcShield({ value, onClick, className }: AcShieldProps) {
 				strokeWidth={1.5}
 				strokeLinecap="round"
 				strokeLinejoin="round"
-				className="absolute inset-0 h-full w-full"
+				className="absolute inset-0 h-full w-full opacity-40"
 				aria-hidden="true"
 			>
 				<path d="M14 1.5 L2.5 6.5 L2.5 15 Q2.5 25 14 30.5 Q25.5 25 25.5 15 L25.5 6.5 Z" />
 			</svg>
-			<span className="relative font-medium text-xs leading-none">
+			<span className="relative -mt-0.5 font-medium text-xs leading-none">
 				{value == null ? "\u2014" : String(value)}
 			</span>
 		</button>