fix(game): 修复底部塔面板不可见问题，改用React层实现，并用AI素材替换Graphics像素块

game/enemies/FreshGraduate.ts

@@ -4,20 +4,7 @@ import { getRandomQuote } from '../data/quotes'
 
 export class FreshGraduate extends EnemyBase {
   constructor(scene: Phaser.Scene, pathPoints: PathPoint[]) {
-    super(scene, pathPoints, 30, 120, 2, 10)
-    this.drawSprite()
-  }
-
-  drawSprite(): void {
-    if (!this.sprite) return
-    this.sprite.clear()
-    this.sprite.fillStyle(0x86efac, 1)
-    this.sprite.fillCircle(0, 0, 8)
-    this.sprite.setDepth(10)
-    this.sprite.setPosition(this.x, this.y)
-  }
-
-  getQuote(): string {
-    return getRandomQuote('FreshGraduate')
+    super(scene, pathPoints, 30, 120, 2, 10, 'enemy-fresh')
   }
+  getQuote(): string { return getRandomQuote('FreshGraduate') }
 }