refactor(SCastSystem): 移除友方技能施放特效逻辑以简化代码

移除playFriendlyCastEffect和doPlayFriendlyCastEffect方法及相关特效播放逻辑，直接调用applyActualFriendlyEffect应用效果。这些特效逻辑与核心功能无关且增加了代码复杂度。

assets/script/game/hero/SCastSystem.ts

@@ -414,71 +414,11 @@ export class SCastSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
             : this.pickRandomFriendlyTargets(targets, sHit);
         
         for (const target of applyTargets) {
-            const startPos = _heroView?.node?.position || _targetPos;
-            if (startPos) {
-                this.playFriendlyCastEffect(startPos, target, isCardSkill, () => {
-                    this.applyActualFriendlyEffect(target, kind, sAp, _cAttrsComp, config, sUp);
-                });
-            } else {
             this.applyActualFriendlyEffect(target, kind, sAp, _cAttrsComp, config, sUp);
         }
     }
-    }
 
-    private playFriendlyCastEffect(startPos: Vec3, target: HeroViewComp, isCardSkill: boolean, callback: Function) {
-        if (!target.node || !target.node.isValid) {
-            callback();
-            return;
-        }
 
-        const prefabPath = "game/skill/buff/buff";
-        const prefab = oops.res.get(prefabPath, Prefab);
-        if (!prefab) {
-            oops.res.load(prefabPath, Prefab, (err, res) => {
-                if (err) {
-                    callback();
-                    return;
-                }
-                this.doPlayFriendlyCastEffect(startPos.clone(), target, res as Prefab, isCardSkill, callback);
-            });
-        } else {
-            this.doPlayFriendlyCastEffect(startPos.clone(), target, prefab as Prefab, isCardSkill, callback);
-        }
-    }
-
-    private doPlayFriendlyCastEffect(startPos: Vec3, target: HeroViewComp, prefab: Prefab, isCardSkill: boolean, callback: Function) {
-        if (!target.node || !target.node.isValid) {
-            callback();
-            return;
-        }
-        const scene = smc.map?.MapView?.scene;
-        const parent = scene?.entityLayer?.node?.getChildByName("SKILL") || target.node.parent;
-        if (!parent) {
-            callback();
-            return;
-        }
-
-        const node = instantiate(prefab);
-        node.parent = parent;
-        
-        startPos.y += 15;
-        node.setPosition(startPos);
-        
-        const targetPos = target.node.position.clone();
-        targetPos.y += 15;
-
-        const dist = Vec3.distance(startPos, targetPos);
-        const duration = Math.min(0.6, Math.max(0.3, dist / 800));
-
-        // 统一走直线
-        tween(node)
-            .to(duration, { position: targetPos, angle: -720 }, { easing: 'sineOut' })
-            .call(() => {
-                if (node.isValid) node.destroy();
-                callback();
-            })
-            .start();
-    }
 
     private applyActualFriendlyEffect(target: HeroViewComp, kind: SkillKind, sAp: number, _cAttrsComp: HeroAttrsComp, config: SkillConfig, sUp: any) {
         if (!target.ent) return;