refactor(mission): 优化节间过场表现与关卡流程

1. 新增地图滚动速度重置与背景动画加速逻辑，强化过场推进感
2. 重构节间过场流程，同步启动英雄归位与地图滚动
3. 调整关卡文本显示格式与字体大小，优化视觉体验
4. 新增全局移动锁控制英雄过场动画状态，修复动画残留问题

assets/script/game/map/view/map/layer/MapLayer.ts

@@ -86,14 +86,35 @@ export default class MapLayer extends Component {
 		return [this.bg_anm, this.bg_anm1, this.bg_anm2, this.bg_anm3, this.bg_anm4].filter((a): a is Animation => a !== null);
 	}
 
+	/** 背景滚动播放速度倍率（节间过场加快推进感） */
+	private static readonly SCROLL_SPEED = 4;
+
 	public playAnimations(name?: string): void {
-		this.animations.forEach(a => name ? a.play(name) : a.play());
+		this.animations.forEach(a => {
+			a.play(name);
+			// 加快背景滚动速度，强化节间"向前推进"的观感（AnimationState.speed 属性）
+			const clip = a.defaultClip;
+			if (clip) {
+				const state = a.getState(clip.name);
+				if (state) state.speed = MapLayer.SCROLL_SPEED;
+			}
+		});
 	}
 
 	public stopAnimations(): void {
 		this.animations.forEach(a => a.stop());
 	}
 
+	/** 恢复背景滚动为正常速度（1x）：大厅/非过场时调用，清除过场加速残留 */
+	public resetSpeed(): void {
+		this.animations.forEach(a => {
+			const clip = a.defaultClip;
+			if (!clip) return;
+			const state = a.getState(clip.name);
+			if (state) state.speed = 1;
+		});
+	}
+
 	public pauseAnimations(): void {
 		this.animations.forEach(a => a.pause());
 	}