refactor: switch cutscene camera to viewport/UV-based system

src/dialogue/DialogueRuntime.h

@@ -77,7 +77,7 @@ private:
 
 	void advanceCutsceneLine();
 	void refreshCutscenePresentation();
-	CutsceneCameraPose evaluateCutsceneCameraPose() const;
+	CutsceneCameraBlendState evaluateCutsceneCameraBlend() const;
 
 	static float applyEasing(EasingType easing, float t);
 	static int computeFallbackCutsceneDurationMs(const std::string& text);