Implement the 016-combatant-ac feature that adds an optional Armor Class field to combatants with shield icon display and inline editing in the encounter tracker

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/App.tsx

@@ -14,6 +14,7 @@ export function App() {
 		setInitiative,
 		setHp,
 		adjustHp,
+		setAc,
 	} = useEncounter();
 
 	return (
@@ -49,6 +50,7 @@ export function App() {
 							onRemove={removeCombatant}
 							onSetHp={setHp}
 							onAdjustHp={adjustHp}
+							onSetAc={setAc}
 						/>
 					))
 				)}