Implement the 025-display-initiative feature that adds initiative modifier and passive initiative display to creature stat blocks, calculated as DEX modifier + (proficiency multiplier × proficiency bonus) from bestiary data, shown in MM 2024 format on the AC line

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

apps/web/src/adapters/bestiary-adapter.ts

@@ -48,6 +48,7 @@ interface RawMonster {
 	legendaryActionsLair?: number;
 	legendaryHeader?: string[];
 	spellcasting?: RawSpellcasting[];
+	initiative?: { proficiency?: number };
 }
 
 interface RawEntry {
@@ -377,6 +378,7 @@ export function normalizeBestiary(raw: { monster: RawMonster[] }): Creature[] {
 				cha: m.cha,
 			},
 			cr: crStr,
+			initiativeProficiency: m.initiative?.proficiency ?? 0,
 			proficiencyBonus: proficiencyBonus(crStr),
 			passive: m.passive,
 			savingThrows: formatSaves(m.save),