feat(player-controller): 实现v0.1角色控制系统

- 移除跳跃逻辑：删除JumpAction、DoJumpStart/End
- 调整CMC参数：MaxWalkSpeed=450, Acceleration=2250, Brake=1500, RotationRate=720
- 调整SpringArm：TargetArmLength=350, SocketOffset.Z=80, CameraLag=6, ProbeSize=12
- 添加Pitch限幅：ViewPitchMin=-30, ViewPitchMax=45, 初始俯角-15°
- 新增交互状态：bIsInteracting + SetInteracting/IsInteracting/IsRunning
- 新增交互IA：InteractAction/CancelAction/SwitchInteractAction（占位回调）
- DoMove添加交互中忽略移动输入检查

Task: P-011

Source/ChildHood/ChildHoodCharacter.h

@@ -30,12 +30,8 @@ class AChildHoodCharacter : public ACharacter
 	/** Follow camera */
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Components", meta = (AllowPrivateAccess = "true"))
 	UCameraComponent* FollowCamera;
-	
-protected:
 
-	/** Jump Input Action */
-	UPROPERTY(EditAnywhere, Category="Input")
-	UInputAction* JumpAction;
+protected:
 
 	/** Move Input Action */
 	UPROPERTY(EditAnywhere, Category="Input")
@@ -49,10 +45,25 @@ protected:
 	UPROPERTY(EditAnywhere, Category="Input")
 	UInputAction* MouseLookAction;
 
+	/** Interact Input Action (E key) — delegates to interaction system */
+	UPROPERTY(EditAnywhere, Category="Input")
+	UInputAction* InteractAction;
+
+	/** Cancel Input Action (ESC key) — delegates to interaction system */
+	UPROPERTY(EditAnywhere, Category="Input")
+	UInputAction* CancelAction;
+
+	/** Switch Interact Target Input Action (Tab / Mouse Wheel) — delegates to interaction system */
+	UPROPERTY(EditAnywhere, Category="Input")
+	UInputAction* SwitchInteractAction;
+
+	/** Whether the character is currently in an interaction */
+	bool bIsInteracting = false;
+
 public:
 
 	/** Constructor */
-	AChildHoodCharacter();	
+	AChildHoodCharacter();
 
 protected:
 
@@ -67,6 +78,15 @@ protected:
 	/** Called for looking input */
 	void Look(const FInputActionValue& Value);
 
+	/** Called for interact input (E) — placeholder, delegates to interaction system */
+	void OnInteract(const FInputActionValue& Value);
+
+	/** Called for cancel input (ESC) — placeholder, delegates to interaction system */
+	void OnCancel(const FInputActionValue& Value);
+
+	/** Called for switch interact target input (Tab/Wheel) — placeholder, delegates to interaction system */
+	void OnSwitchInteract(const FInputActionValue& Value);
+
 public:
 
 	/** Handles move inputs from either controls or UI interfaces */
@@ -77,13 +97,17 @@ public:
 	UFUNCTION(BlueprintCallable, Category="Input")
 	virtual void DoLook(float Yaw, float Pitch);
 
-	/** Handles jump pressed inputs from either controls or UI interfaces */
-	UFUNCTION(BlueprintCallable, Category="Input")
-	virtual void DoJumpStart();
+	/** Set interaction state — called by interaction system */
+	UFUNCTION(BlueprintCallable, Category="Interaction")
+	void SetInteracting(bool bValue);
 
-	/** Handles jump pressed inputs from either controls or UI interfaces */
-	UFUNCTION(BlueprintCallable, Category="Input")
-	virtual void DoJumpEnd();
+	/** Query: is the character currently interacting? */
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category="Interaction")
+	bool IsInteracting() const;
+
+	/** Query: is the character currently running (moving on ground)? */
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category="Interaction")
+	bool IsRunning() const;
 
 public:
 
@@ -93,4 +117,3 @@ public:
 	/** Returns FollowCamera subobject **/
 	FORCEINLINE class UCameraComponent* GetFollowCamera() const { return FollowCamera; }
 };
-