Add unit test for target direction initialization in ThirdPersonNavigationController

tests/unit/third-person-navigation-controller.test.ts

@@ -241,6 +241,33 @@ describe("ThirdPersonNavigationController", () => {
     controller.deactivate(targetContext);
   });
 
+  it("uses target direction as the lock-on base yaw immediately", () => {
+    const { context } = createRuntimeControllerContext();
+    const controller = new ThirdPersonNavigationController();
+    const targetContext = {
+      ...context,
+      resolveThirdPersonTargetAssist: () => ({
+        targetPosition: {
+          x: 5,
+          y: 1,
+          z: 0
+        },
+        strength: 1
+      })
+    };
+
+    controller.activate(targetContext);
+
+    expect(Math.abs(targetContext.camera.position.x)).toBeLessThan(0.001);
+
+    controller.update(0);
+
+    expect(targetContext.camera.position.x).toBeLessThan(-3);
+    expect(Math.abs(targetContext.camera.position.z)).toBeLessThan(1);
+
+    controller.deactivate(targetContext);
+  });
+
   it("fades vertical target assist when camera collision pushes the camera close", () => {
     const { context } = createRuntimeControllerContext();
     const controller = new ThirdPersonNavigationController();