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/include/Engine/ECS/Components.h

@@ -70,19 +70,28 @@ namespace Engine::ECS {
             // 90 → 89.98）。贴锁区改走组合角 atan2（分子分母同源缩放，
             // 比值稳定）→ 手输 90.0 显示 90.0。落入该窄区（±0.00057°）
             // 的真实 yaw/roll 被归并为组合角，UI 输入不可达，可接受
-            if (std::abs(sp) < 1.0f - 1e-6f) {
-                return glm::degrees(glm::vec3(
+            glm::vec3 euler = std::abs(sp) < 1.0f - 1e-6f
+                ? glm::degrees(glm::vec3(
                     std::asin(sp),
                     std::atan2(R[2][0], R[2][2]),
-                    std::atan2(R[0][1], R[1][1])));
+                    std::atan2(R[0][1], R[1][1])))
+                : (sp > 0.0f
+                    ? glm::vec3(90.0f,
+                                glm::degrees(std::atan2(-R[0][2], R[1][2])),
+                                0.0f)
+                    : glm::vec3(-90.0f,
+                                glm::degrees(std::atan2(-R[0][2], -R[1][2])),
+                                0.0f));
+            // 显示约定 = UE Details 的 0-360（-90 → 270）。逐轴 fmod wrap
+            // 与 [-180,180] 数学严格等价（每轴旋转周期 360°），矩阵重建类
+            // 消费端（Camera::EulerRotMat 等）不受影响；需要连续域做
+            // clamp/lerp 的调用方自行 wrap 回 [-180,180]（如自由视角）
+            for (int i = 0; i < 3; ++i) {
+                euler[i] = std::fmod(euler[i], 360.0f);
+                if (euler[i] < 0.0f) euler[i] += 360.0f;
+                if (euler[i] >= 360.0f) euler[i] = 0.0f;   // 浮点边界
             }
-            // ±90° 万向锁：yaw/roll 只剩组合角，约定 roll=0（UE 同策略）
-            // 归入 yaw；两支组合角符号不同
-            return sp > 0.0f
-                ? glm::vec3(90.0f,
-                            glm::degrees(std::atan2(-R[0][2], R[1][2])), 0.0f)
-                : glm::vec3(-90.0f,
-                            glm::degrees(std::atan2(-R[0][2], -R[1][2])), 0.0f);
+            return euler;
         }
 
         // ---- 写入（标脏，脏实体由 UpdateTransforms 重算）----