Implement the 017-combat-conditions feature that adds D&D 5e status conditions to combatants with icon tags, color coding, and a compact toggle picker in the encounter tracker

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

packages/application/src/toggle-condition-use-case.ts

@@ -0,0 +1,25 @@
+import {
+	type CombatantId,
+	type ConditionId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	toggleCondition,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function toggleConditionUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	conditionId: ConditionId,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = toggleCondition(encounter, combatantId, conditionId);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}