fix(combat): 战斗逐项对齐 40250，修复移动 / 技能释放与武器挂点

- 连击类型由 combo_changed 驱动（SetComboSkillFlag，技能 122 等级）
- 命中判定改为 .msa 刀尖 Z 圆柱 vs .msm 防御球（hit_collision.gd 逐行移植）
- _register_hit 改为 map::insert 语义，修正命中上限
- 攻速同时缩放 GetAttackingElapsedTime 与攻击动作速率；按武器动作模式目录绑定攻击段
- 去掉本地连击超时，motion_bound 清命中表 / 连击段号
- __ProcessDataAttackSuccess：InsertDelay 硬直、physics_push.gd 击退 + GetBlendingPosition 同步、
  命中特效、__HitGood / __HitGreate / __HitStone 受击动作链与抖动（ui/hit_reaction.gd）
- ClassicSession::send_use_skill 不再夹带 CG_FLY_TARGETING
- mac 前进 / 后退方向与技能释放修复；武器按职业骨骼挂到手上
- 新增 hit_collision / physics_push / hit_view / net_world_push / weapon_attach 测试；
  gpu_pose_bounds / race_motion_assembly 适配 damage 随机变体
- 文档：CLIENT-GAP.md、CLIENT-GAP-FIX.md §3.5 / §3.7 与 C.5 增量 130

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ft3kXpNdLbKEfg5uDLfqVF

project/race_motion_assembly_test.gd

@@ -33,7 +33,9 @@ func run() -> void:
 				"race %d: hair is from a different resource family" % race)
 		for motion in ["wait", "walk", "run", "attack", "damage", "dead"]:
 			pv.set_anim_state(motion)
-			check(String(pv.anim.get("anim_path")).get_file() == motion + ".msa",
+			# damage is registered as two equal-weight variants (damage / damage_1).
+			var variants: Array = PlayerView.REACTION_FILES.get(motion, [motion])
+			check(String(pv.anim.get("anim_path")).get_file().get_basename() in variants,
 					"race %d: missing %s motion" % [race, motion])
 			for fraction in [0.0, 0.5, 1.0]:
 				pv.anim.set("time", float(pv.anim.call("get_duration")) * fraction)