Add Xiapi outer siege chapter

src/game/scenes/TitleScene.ts

@@ -11,6 +11,7 @@ import {
   seventhBattleScenario,
   sixthBattleScenario,
   tenthBattleScenario,
+  twelfthBattleScenario,
   thirdBattleScenario
 } from '../data/battles';
 import { hasCampaignSave, loadCampaignState, startNewCampaign } from '../state/campaignState';
@@ -321,7 +322,8 @@ export class TitleScene extends Phaser.Scene {
       campaign.step === 'eighth-camp' ||
       campaign.step === 'ninth-camp' ||
       campaign.step === 'tenth-camp' ||
-      campaign.step === 'eleventh-camp'
+      campaign.step === 'eleventh-camp' ||
+      campaign.step === 'twelfth-camp'
     ) {
       this.scene.start('CampScene');
       return;
@@ -382,6 +384,11 @@ export class TitleScene extends Phaser.Scene {
       return;
     }
 
+    if (campaign.step === 'twelfth-battle') {
+      this.scene.start('BattleScene', { battleId: twelfthBattleScenario.id });
+      return;
+    }
+
     if (campaign.step === 'first-victory-story') {
       this.scene.start('StoryScene', { pages: firstBattleVictoryPages, nextScene: 'TitleScene' });
       return;