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/hooks/use-initiative-rolls.ts

@@ -0,0 +1,75 @@
+import {
+	rollAllInitiativeUseCase,
+	rollInitiativeUseCase,
+} from "@initiative/application";
+import {
+	type CombatantId,
+	isDomainError,
+	type RollMode,
+} from "@initiative/domain";
+import { useCallback, useState } from "react";
+import { useBestiaryContext } from "../contexts/bestiary-context.js";
+import { useEncounterContext } from "../contexts/encounter-context.js";
+import { useSidePanelContext } from "../contexts/side-panel-context.js";
+
+function rollDice(): number {
+	return Math.floor(Math.random() * 20) + 1;
+}
+
+export function useInitiativeRolls() {
+	const { encounter, makeStore } = useEncounterContext();
+	const { getCreature } = useBestiaryContext();
+	const { showCreature } = useSidePanelContext();
+
+	const [rollSkippedCount, setRollSkippedCount] = useState(0);
+	const [rollSingleSkipped, setRollSingleSkipped] = useState(false);
+
+	const handleRollInitiative = useCallback(
+		(id: CombatantId, mode: RollMode = "normal") => {
+			const diceRolls: [number, ...number[]] =
+				mode === "normal" ? [rollDice()] : [rollDice(), rollDice()];
+			const result = rollInitiativeUseCase(
+				makeStore(),
+				id,
+				diceRolls,
+				getCreature,
+				mode,
+			);
+			if (isDomainError(result)) {
+				setRollSingleSkipped(true);
+				const combatant = encounter.combatants.find((c) => c.id === id);
+				if (combatant?.creatureId) {
+					showCreature(combatant.creatureId);
+				}
+			}
+		},
+		[makeStore, getCreature, encounter.combatants, showCreature],
+	);
+
+	const handleRollAllInitiative = useCallback(
+		(mode: RollMode = "normal") => {
+			const result = rollAllInitiativeUseCase(
+				makeStore(),
+				rollDice,
+				getCreature,
+				mode,
+			);
+			if (!isDomainError(result) && result.skippedNoSource > 0) {
+				setRollSkippedCount(result.skippedNoSource);
+			}
+		},
+		[makeStore, getCreature],
+	);
+
+	return {
+		rollSkippedCount,
+		rollSingleSkipped,
+		dismissRollSkipped: useCallback(() => setRollSkippedCount(0), []),
+		dismissRollSingleSkipped: useCallback(
+			() => setRollSingleSkipped(false),
+			[],
+		),
+		handleRollInitiative,
+		handleRollAllInitiative,
+	} as const;
+}