added dialog start radius and background by time in cutscenes

src/dialogue/DialogueRuntime.h

@@ -64,6 +64,8 @@ private:
 	int currentCutsceneLine = -1;
 	int cutsceneTimerMs = 0;
 
+	std::string currentCutsceneBackground;
+
 	bool evaluateConditions(const std::vector<Condition>& conditions) const;
 	void applyEffects(const std::vector<Effect>& effects);