Add PF2e persistent damage condition tags

Persistent damage displayed as compact tags with damage type icon and
formula (e.g., Flame + "2d6"). Supports fire, bleed, acid, cold,
electricity, poison, and mental types. One instance per type, added via
sub-picker in the condition picker. PF2e only, persists across reload.

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

packages/application/src/add-persistent-damage-use-case.ts

@@ -0,0 +1,20 @@
+import {
+	addPersistentDamage,
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	type PersistentDamageType,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+import { runEncounterAction } from "./run-encounter-action.js";
+
+export function addPersistentDamageUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	damageType: PersistentDamageType,
+	formula: string,
+): DomainEvent[] | DomainError {
+	return runEncounterAction(store, (encounter) =>
+		addPersistentDamage(encounter, combatantId, damageType, formula),
+	);
+}