Bug fixes — Miyuuri's Cozy Hours Steam update #425444

1. The right-click drag script completely lacks this code; `new_pos` is directly assigned to the root node position. When the mouse quickly moves out of the window or operates at the boundary of multiple monitors, the calculated coordinates may be extreme values, causing the window to be thrown off-screen and into an invisible area.2. The game starts without any visuals. When the game starts and the position is (0,0) or outside the screen range, it should fall back to a reasonable default position (e.g., the center of the screen).It's possible that updates will introduce new bugs. Rabbit ear accessories have been added.