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/domain/src/events.ts

@@ -1,5 +1,6 @@
 import type { ConditionId } from "./conditions.js";
 import type { CreatureId } from "./creature-types.js";
+import type { PersistentDamageType } from "./persistent-damage.js";
 import type { PlayerCharacterId } from "./player-character-types.js";
 import type { CombatantId } from "./types.js";
 
@@ -132,6 +133,19 @@ export interface ConcentrationEnded {
 	readonly combatantId: CombatantId;
 }
 
+export interface PersistentDamageAdded {
+	readonly type: "PersistentDamageAdded";
+	readonly combatantId: CombatantId;
+	readonly damageType: PersistentDamageType;
+	readonly formula: string;
+}
+
+export interface PersistentDamageRemoved {
+	readonly type: "PersistentDamageRemoved";
+	readonly combatantId: CombatantId;
+	readonly damageType: PersistentDamageType;
+}
+
 export interface CreatureAdjustmentSet {
 	readonly type: "CreatureAdjustmentSet";
 	readonly combatantId: CombatantId;
@@ -181,6 +195,8 @@ export type DomainEvent =
 	| ConditionRemoved
 	| ConcentrationStarted
 	| ConcentrationEnded
+	| PersistentDamageAdded
+	| PersistentDamageRemoved
 	| CreatureAdjustmentSet
 	| EncounterCleared
 	| PlayerCharacterCreated