feat(clipping): add hideSection and recoverSection methods

Add new methods for temporary section plane visibility control:
- hideSection(): Hide section plane temporarily (calls engine.clipping.disabled())
- recoverSection(): Recover hidden section plane (calls engine.clipping.recover())

Update SectionPlaneDialogManager to use hideSection() instead of direct API call.

src/managers/engine-manager.ts

@@ -302,6 +302,28 @@ export class EngineManager extends BaseManager {
         this.engineInstance.setSectionBoxRange(range);
     }
 
+    /**
+     * 隐藏剖切面（临时隐藏，可恢复）
+     * @remarks 配合 recoverSection() 使用
+     */
+    public hideSection(): void {
+        if (!this.engineInstance) {
+            return;
+        }
+        this.engineInstance.hideSection();
+    }
+
+    /**
+     * 恢复剖切面（从隐藏状态恢复）
+     * @remarks 恢复被 hideSection() 隐藏的剖切面
+     */
+    public recoverSection(): void {
+        if (!this.engineInstance) {
+            return;
+        }
+        this.engineInstance.recoverSection();
+    }
+
     /** 激活框选放大功能 */
     public activateZoomBox(): void {
         if (!this.engineInstance) {