feat(editor): rotation display in UE's 0-360 convention

User pointed out the real gap: UE Details shows rotation in [0,360)
(-90 reads 270); our readback exposed [-180,180] with negative zeros.
GetRotation now wraps each axis to [0,360) via fmod -- strictly
equivalent math (each axis has 360-degree period), so matrix-rebuild
consumers like Camera::EulerRotMat are unaffected. The one consumer
needing a continuous domain is the free-look pitch clamp [-89,89] in
Camera::Update, which wraps back to [-180,180) before applying deltas.

Engine/src/Renderer/Camera.cpp

@@ -52,6 +52,14 @@ namespace Engine {
             if (mouseDX != 0 || mouseDY != 0)
             {
                 glm::vec3 rot = transform.GetRotation();
+                // GetRotation 是 0-360 显示域（UE Details 约定）；pitch 的
+                // clamp 需要连续域，wrap 回 [-180,180)（yaw 同步处理，
+                // 跨 ±180 继续累减不打折返）
+                for (int i = 0; i < 2; ++i) {
+                    rot[i] = std::fmod(rot[i], 360.0f);
+                    if (rot[i] >= 180.0f) rot[i] -= 360.0f;
+                    if (rot[i] < -180.0f) rot[i] += 360.0f;
+                }
                 // 右手系绕 Y 正角度 = 向左转，鼠标右移（DX>0）应看向右
                 // → yaw 取负。pitch 正角度 = 抬头，鼠标下移（DY>0）低头
                 // → rot.x 直接用负号，两者符号已核对一致