Verify first camp founding trio deployment

scripts/verify-release-candidate.mjs

@@ -127,6 +127,12 @@ try {
     firstCampProbe.state?.nextSortieBattleId === 'second-battle-yellow-turban-pursuit',
     `Expected first camp sortie flow to prepare unlocked second battle: ${JSON.stringify(firstCampProbe.state)}`
   );
+  assert(
+    ['liu-bei', 'guan-yu', 'zhang-fei'].every((unitId) =>
+      firstCampProbe.state?.sortieDeploymentPreview?.some((slot) => slot.unitId === unitId)
+    ),
+    `Expected first camp deployment preview to keep the founding trio assigned: ${JSON.stringify(firstCampProbe.state?.sortieDeploymentPreview)}`
+  );
   assert(firstCampProbe.summary?.includes('보유 군자금'), `Expected camp summary to show held gold: ${JSON.stringify(firstCampProbe)}`);
   assert(firstCampProbe.texts.some((text) => text.includes('전투 보상')), `Expected camp report to show battle reward: ${JSON.stringify(firstCampProbe.texts)}`);
   assert(