Tune early battle objective QA

src/game/data/battles.ts

@@ -348,6 +348,8 @@ export type BattleObjectiveDefinition = {
   rewardGold: number;
   unitId?: string;
   terrain?: string;
+  targetTile?: { x: number; y: number; radius?: number };
+  threatRadius?: number;
   maxTurn?: number;
 };
 
@@ -509,7 +511,9 @@ export const firstBattleScenario: BattleScenarioDefinition = {
       kind: 'secure-terrain',
       label: '마을 확보',
       rewardGold: 150,
-      terrain: 'village'
+      terrain: 'village',
+      targetTile: { x: 15, y: 5, radius: 4 },
+      threatRadius: 1
     },
     {
       id: 'quick',
@@ -720,7 +724,9 @@ export const thirdBattleScenario: BattleScenarioDefinition = {
       kind: 'secure-terrain',
       label: '강가 요새 확보',
       rewardGold: 220,
-      terrain: 'fort'
+      terrain: 'fort',
+      targetTile: { x: 19, y: 2, radius: 2 },
+      threatRadius: 0
     },
     {
       id: 'quick',