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/physics_push_test.gd

@@ -0,0 +1,72 @@
+# physics_push_test —— §3.7：受击击退物理（GameLib/PhysicsObject.cpp CPhysicsObject +
+# MapUtil.cpp CEaseOutInterpolation）headless 自检。
+#   godot --headless --path project --script physics_push_test.gd
+extends SceneTree
+
+const PhysicsPush = preload("res://physics_push.gd")
+
+var _fail := 0
+func _ck(c: bool, m: String) -> void:
+	if not c:
+		_fail += 1
+		printerr("FAIL: " + m)
+
+func _init() -> void:
+	_run()
+	if _fail == 0:
+		print("PASS: physics_push_test (external force / friction / ease-out blend)")
+		quit(0)
+	else:
+		printerr("%d check(s) failed" % _fail)
+		quit(1)
+
+func _run() -> void:
+	# 初始：不在 blending，每帧位移 0
+	var p := PhysicsPush.new()
+	_ck(not p.is_blending(), "fresh object -> not blending")
+	p.update(0.02)
+	_ck(p.get_movement() == Vector2.ZERO, "fresh object -> zero movement")
+
+	# IncreaseExternalForce(F=3, dir +X)：vel 3 -> 每步摩擦 0.3，累计 2.7+2.4+…+0.3 = 13.5 cm
+	p.set_direction(Vector2(1, 0))
+	p.increase_external_force(3.0)
+	_ck(absf(p.get_last_position().x - 13.5) < 0.001 and absf(p.get_last_position().y) < 0.001,
+			"F=3 along +X -> last position (13.5, 0), got %s" % p.get_last_position())
+	_ck(p.is_blending(), "after push -> blending (ease-out playing)")
+
+	# 逐帧 AddMovement(GetXMovement, GetYMovement)：2 秒 ease-out 累计 ≈ 13.5（离散 Euler 少 1/N）
+	var sum := Vector2.ZERO
+	var frames := 0
+	while p.is_blending() and frames < 1000:
+		p.update(0.02)
+		sum += p.get_movement()
+		frames += 1
+	_ck(frames >= 99 and frames <= 101, "blend lasts LoopValue*c_fFrameTime = 2s, got %d frames" % frames)
+	_ck(absf(sum.x - 13.5) < 0.3 and absf(sum.y) < 0.001, "ease-out total movement ≈ 13.5, got %s" % sum)
+	p.update(0.02)
+	_ck(p.get_movement() == Vector2.ZERO, "blend done -> movement 0")
+
+	# 斜向：分量各自摩擦，13.5 * cos45
+	var q := PhysicsPush.new()
+	q.set_direction(Vector2(1, 1).normalized())
+	q.increase_external_force(3.0)
+	_ck(absf(q.get_last_position().x - 13.5 * 0.70710678) < 0.01 and absf(q.get_last_position().y - 13.5 * 0.70710678) < 0.01,
+			"diagonal push -> per-axis 9.546, got %s" % q.get_last_position())
+
+	# 分量 vel*dir < EPSILON(0.001) 当步清零（3*0.01*0.01 = 3e-4）
+	var w := PhysicsPush.new()
+	w.set_direction(Vector2(0.99995, 0.01))
+	w.increase_external_force(3.0)
+	_ck(w.get_last_position().y == 0.0, "tiny axis component zeroed on first step, got %s" % w.get_last_position())
+
+	# 力为 0：没有位移，也不 blending（Setup(0,0,2) 仍在播放 -> isBlending 为真，与参考端一致）
+	var z := PhysicsPush.new()
+	z.set_direction(Vector2(1, 0))
+	z.increase_external_force(0.0)
+	_ck(z.get_last_position() == Vector2.ZERO, "zero force -> no movement")
+
+	# 撞墙（IPhysicsWorld::isPhysicalCollision 为真）-> Initialize()，不推
+	var c := PhysicsPush.new()
+	c.set_direction(Vector2(1, 0))
+	c.increase_external_force(3.0, func(_moved: Vector2) -> bool: return true)
+	_ck(c.get_last_position() == Vector2.ZERO and not c.is_blending(), "world collision -> Initialize, no push")