Refactor App.tsx from god component to context-based architecture

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

apps/web/src/components/turn-navigation.tsx

@@ -1,21 +1,12 @@
-import type { Encounter } from "@initiative/domain";
 import { StepBack, StepForward, Trash2 } from "lucide-react";
-import { Button } from "./ui/button";
-import { ConfirmButton } from "./ui/confirm-button";
+import { useEncounterContext } from "../contexts/encounter-context.js";
+import { Button } from "./ui/button.js";
+import { ConfirmButton } from "./ui/confirm-button.js";
 
-interface TurnNavigationProps {
-	encounter: Encounter;
-	onAdvanceTurn: () => void;
-	onRetreatTurn: () => void;
-	onClearEncounter: () => void;
-}
+export function TurnNavigation() {
+	const { encounter, advanceTurn, retreatTurn, clearEncounter } =
+		useEncounterContext();
 
-export function TurnNavigation({
-	encounter,
-	onAdvanceTurn,
-	onRetreatTurn,
-	onClearEncounter,
-}: Readonly<TurnNavigationProps>) {
 	const hasCombatants = encounter.combatants.length > 0;
 	const isAtStart = encounter.roundNumber === 1 && encounter.activeIndex === 0;
 	const activeCombatant = encounter.combatants[encounter.activeIndex];
@@ -25,7 +16,7 @@ export function TurnNavigation({
 			<Button
 				variant="ghost"
 				size="icon"
-				onClick={onRetreatTurn}
+				onClick={retreatTurn}
 				disabled={!hasCombatants || isAtStart}
 				title="Previous turn"
 				aria-label="Previous turn"
@@ -48,14 +39,14 @@ export function TurnNavigation({
 				<ConfirmButton
 					icon={<Trash2 className="h-5 w-5" />}
 					label="Clear encounter"
-					onConfirm={onClearEncounter}
+					onConfirm={clearEncounter}
 					disabled={!hasCombatants}
 					className="text-muted-foreground"
 				/>
 				<Button
 					variant="ghost"
 					size="icon"
-					onClick={onAdvanceTurn}
+					onClick={advanceTurn}
 					disabled={!hasCombatants}
 					title="Next turn"
 					aria-label="Next turn"