feat: 实现DoT灼烧技能与debuff图标系统

本次提交完成了以下核心改动：
1.  调整fb-1~fb-6技能预制件的攻击偏移坐标，优化技能弹道位置
2.  新增DoT伤害机制，支持周期伤害/治疗的独立结算
3.  为Buff系统添加施法者属性快照，让DoT暴击、控制判定更准确
4.  新增顶栏debuff图标显示功能，支持灼烧等负面状态可视化
5.  为破晓先知等英雄替换为新的灼烧火球技能6104
6.  修复fb-2预制件的配置字段顺序与多余属性问题

assets/script/game/common/config/SkillSet.ts

@@ -311,6 +311,12 @@ export const SkillSet: Record<number, SkillConfig> = {
         DTType: DTType.single, ap: 100, hit_count: 2, hitcd: 0.3, speed: 720, with: 90, ready: 0.2, EAnm: 0, DAnm: "", IType: IType.remote,
         RType: RType.linear, EType: EType.collision, info: "造成攻击力100%的伤害, 高阶技能",
     },
+    // DoT 技能：命中附加灼烧（7002，BuffList 的 Debuff DoT 底座），tick 伤害受施法者 ap 缩放
+    6104: {
+        uuid: 6104, name: "灼热火球", sp_name: "fb-1", icon: "Stat_FireDamage", TGroup: TGroup.Enemy, readyAnm: "", endAnm: "", act: "atk",
+        DTType: DTType.single, ap: 80, hit_count: 2, hitcd: 0.3, speed: 720, with: 90, ready: 0.2, EAnm: 0, DAnm: "", IType: IType.remote,
+        RType: RType.bezier, EType: EType.collision, timed_buff_id: 7002, info: "造成攻击力80%的伤害, 命中附加灼烧(5秒内持续掉血)",
+    },
     6201: {
         uuid: 6201, name: "陨石术", sp_name: "fb-3", icon: "Stat_Tripleshot", TGroup: TGroup.Enemy, readyAnm: "blues", endAnm: "", act: "max",
         DTType: DTType.aoe_grid, stun: 0, ap: 150, hit_count: 6, hitcd: 0.2, speed: 720, with: 0, ready: 0.2, EAnm: 0, DAnm: "", IType: IType.remote,