右键 tilt 松开后自动归位（记录/恢复相机状态）

src/scene/CesiumGlobe.js

@@ -255,6 +255,7 @@ export class CesiumGlobe {
 
     this._buildMarkers();
     this._setupPick();
+    this._setupRightRestore();
     this._loadBoundaries();
     this._buildCityLabels();
 
@@ -355,7 +356,34 @@ export class CesiumGlobe {
     viewer.screenSpaceEventHandler.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_DOUBLE_CLICK);
   }
 
-  // 右键环视：地表附近右键拖动，以点击点为球心调整视角，松开归位
+  // 右键操作（原生 tilt）松开后自动归位：记录按下前状态，松开时恢复
+  _setupRightRestore() {
+    const scene = this.viewer.scene;
+    const camera = this.viewer.camera;
+    const handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
+    this._rightRestore = null;
+
+    handler.setInputAction(() => {
+      this._rightRestore = {
+        position: Cesium.Cartesian3.clone(camera.position),
+        direction: Cesium.Cartesian3.clone(camera.direction),
+        up: Cesium.Cartesian3.clone(camera.up),
+      };
+    }, Cesium.ScreenSpaceEventType.RIGHT_DOWN);
+
+    handler.setInputAction(() => {
+      if (!this._rightRestore) return;
+      const s = this._rightRestore;
+      this._rightRestore = null;
+      camera.setView({
+        destination: s.position,
+        orientation: { direction: s.direction, up: s.up },
+      });
+    }, Cesium.ScreenSpaceEventType.RIGHT_UP);
+
+    this._rightRestoreHandler = handler;
+  }
+
   // 相机平滑飞至某个标记上空并居中：回到与初始一致的高度与北朝上方向，左键拖拽手感不变
   flyToEntry(index) {
     const entry = ENTRIES[index];