feat(towers): 实现防御塔基类与4种塔及塔管理器

game/towers/SeniorDevTower.ts

@@ -0,0 +1,76 @@
+import type Phaser from 'phaser'
+import { TowerBase } from './TowerBase'
+import type { EnemyBase } from '../enemies/EnemyBase'
+
+export class SeniorDevTower extends TowerBase {
+  constructor(scene: Phaser.Scene, gridX: number, gridY: number) {
+    super(scene, gridX, gridY, 120, 5, 30, 1.0)
+    this.drawSprite()
+  }
+
+  drawSprite(): void {
+    if (!this.sprite) return
+    this.sprite.clear()
+    // 深蓝色方块
+    this.sprite.fillStyle(0x3b82f6, 1)
+    this.sprite.fillRect(-12, -12, 24, 24)
+    this.sprite.lineStyle(1, 0x93c5fd, 1)
+    this.sprite.strokeRect(-12, -12, 24, 24)
+    this.sprite.setPosition(this.px, this.py)
+    this.sprite.setDepth(10)
+
+    // 顶部 </> 符号文字
+    if (this.scene) {
+      const existing = this.scene.children.getByName(`dev_label_${this.gridX}_${this.gridY}`)
+      if (!existing) {
+        this.scene.add
+          .text(this.px, this.py, '</>', {
+            fontFamily: 'monospace',
+            fontSize: '10px',
+            color: '#DBEAFE',
+          })
+          .setOrigin(0.5, 0.5)
+          .setDepth(11)
+          .setName(`dev_label_${this.gridX}_${this.gridY}`)
+      }
+    }
+  }
+
+  attack(target: EnemyBase): void {
+    // 发射绿色代码块子弹
+    this.fireBullet(target)
+  }
+
+  private fireBullet(target: EnemyBase): void {
+    const bullet = this.scene.add.graphics()
+    bullet.fillStyle(0x22c55e, 1)
+    bullet.fillRect(-4, -4, 8, 8)
+    bullet.setPosition(this.px, this.py)
+    bullet.setDepth(13)
+
+    const startX = this.px
+    const startY = this.py
+    const targetX = target.sprite.x
+    const targetY = target.sprite.y
+
+    const dx = targetX - startX
+    const dy = targetY - startY
+    const dist = Math.sqrt(dx * dx + dy * dy)
+    const duration = (dist / 400) * 1000
+
+    this.scene.tweens.add({
+      targets: bullet,
+      x: targetX,
+      y: targetY,
+      duration,
+      onComplete: () => {
+        bullet.destroy()
+        if (!target.isDead) {
+          target.takeDamage(this.attackDamage)
+          // 代码屎山：附加 DOT
+          target.addDOT(10, 3000)
+        }
+      },
+    })
+  }
+}