feat: 添加跳跃 GameplayAbility (GA)

- 创建 UPHYGA_Jump 类用于处理跳跃能力
- 在 APHYPlayerCharacter 中添加跳跃能力授予
- 支持按住跳跃和松开停止跳跃
- 集成 GAS 输入标签系统

Source/PHY/Private/AbilitySystem/Abilities/PHYGA_Jump.cpp

@@ -0,0 +1,67 @@
+#include "PHYGA_Jump.h"
+#include "AbilitySystemComponent.h"
+#include "GameFramework/Character.h"
+#include "GameFramework/CharacterMovementComponent.h"
+#include "GameplayTags/InputTags.h"
+
+UPHYGA_Jump::UPHYGA_Jump()
+{
+	// 设置能力激活类型：通过输入标签触发
+	NetExecutionPolicy = EGameplayAbilityNetExecutionPolicy::LocalPredicted;
+	InstancingPolicy = EGameplayAbilityInstancingPolicy::InstancedPerActor;
+
+	// 允许在移动中跳跃
+	AbilityTags.AddTag(FGameplayTag::RequestGameplayTag(FName("Ability.Movement.Jump")));
+}
+
+void UPHYGA_Jump::ActivateAbility(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, const FGameplayEventData* TriggerEventData)
+{
+	if (!CommitAbility(Handle, ActorInfo, ActivationInfo))
+	{
+		EndAbility(Handle, ActorInfo, ActivationInfo, true, true);
+		return;
+	}
+
+	CommitJump();
+}
+
+void UPHYGA_Jump::CommitJump()
+{
+	ACharacter* Character = Cast<ACharacter>(GetAvatarActorFromActorInfo());
+	if (!Character)
+	{
+		EndAbility(CurrentSpecHandle, CurrentActorInfo, CurrentActivationInfo, true, true);
+		return;
+	}
+
+	Character->Jump();
+}
+
+void UPHYGA_Jump::InputReleased(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo)
+{
+	// 当松开跳跃键时，停止跳跃（允许空中调整）
+	ACharacter* Character = Cast<ACharacter>(GetAvatarActorFromActorInfo());
+	if (Character)
+	{
+		Character->StopJumping();
+	}
+
+	EndAbility(Handle, ActorInfo, ActivationInfo, true, false);
+}
+
+bool UPHYGA_Jump::CanActivateAbility(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayTagContainer* SourceTags, const FGameplayTagContainer* TargetTags, FGameplayTagContainer* OptionalRelevantTags) const
+{
+	if (!Super::CanActivateAbility(Handle, ActorInfo, SourceTags, TargetTags, OptionalRelevantTags))
+	{
+		return false;
+	}
+
+	ACharacter* Character = Cast<ACharacter>(ActorInfo->AvatarActor);
+	if (!Character)
+	{
+		return false;
+	}
+
+	// 检查是否能够跳跃（不在空中或者角色支持多段跳）
+	return Character->CanJump();
+}

Source/PHY/Private/AbilitySystem/Abilities/PHYGA_Jump.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "AbilitySystemInterface.h"
+#include "Abilities/GameplayAbility.h"
+#include "PHYGA_Jump.generated.h"
+
+UCLASS()
+class PHY_API UPHYGA_Jump : public UGameplayAbility
+{
+	GENERATED_BODY()
+
+public:
+	UPHYGA_Jump();
+
+	virtual void ActivateAbility(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, const FGameplayEventData* TriggerEventData) override;
+
+	virtual void InputReleased(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo) override;
+
+protected:
+	virtual bool CanActivateAbility(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayTagContainer* SourceTags, const FGameplayTagContainer* TargetTags, FGameplayTagContainer* OptionalRelevantTags) const override;
+
+private:
+	void CommitJump();
+};

Source/PHY/Private/Character/PHYPlayerCharacter.cpp

@@ -216,6 +216,13 @@ void APHYPlayerCharacter::InitializeGAS()
 			ASC->SetNumericAttributeBase(UPHYAttributeSet::GetHealthAttribute(), AS->GetMaxHealth());
 			ASC->SetNumericAttributeBase(UPHYAttributeSet::GetInnerPowerAttribute(), AS->GetMaxInnerPower());
 		}
+
+		// Grant default abilities (e.g., Jump)
+		if (JumpAbilityClass)
+		{
+			FGameplayAbilitySpec JumpSpec(JumpAbilityClass, 1, 0, this);
+			ASC->GiveAbility(JumpSpec);
+		}
 		
 		StopRegen();
 		if (RegenInterval > 0.f)

Source/PHY/Private/Character/PHYPlayerCharacter.h

@@ -30,6 +30,10 @@ protected:
 	/** 职业/门派/流派：决定初始四维 */
 	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category="PHY|Class")
 	EPHYCharacterClass CharacterClass = EPHYCharacterClass::Warrior;
+
+	/** 跳跃能力 */
+	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category="PHY|Abilities")
+	TSubclassOf<UGameplayAbility> JumpAbilityClass;
 	
 	/**
 	* 角色的相机组件