fix(game): 修复输了能进下一关的Bug、换关后塔残留、召唤按钮太小、战斗前不能发激励

game/towers/TowerManager.ts

@@ -258,6 +258,17 @@ export class TowerManager {
     return this.towers
   }
 
+  /** 切换地图时清除所有防御塔（静默销毁，不播放音效） */
+  clearAllTowers(): void {
+    for (const tower of this.towers) {
+      tower.destroy()
+    }
+    this.towers = []
+    this.occupiedCells.clear()
+    this.infoLabel?.destroy()
+    this.infoLabel = null
+  }
+
   hasTowerAt(gridX: number, gridY: number): boolean {
     return this.occupiedCells.has(`${gridX},${gridY}`)
   }