UI & Control Improvements — StudyHub Steam update #985304

What’s Changed?Mouse Decoupling: The "Q" key is now used to free the mouse cursor. To open or close the side panel, simply press "Q" and click the yellow flag icon on the HUD.Seamless Interaction: Previously, opening the side menu would dim the screen and lock movement. The dimmer has been removed, allowing the menu to stay open while moving or working.Chat Enhancements: The chat can still be toggled using the arrow in the bottom-left corner, and you can now keep it open indefinitely. To ensure it doesn't interrupt your experience, the chat background has been made transparent, making it less intrusive while you work.Unified Logic: Instead of assigning new keys to every pop-up, everything is being transitioned to this unified "free mouse" system.Why This Change?Assigning unique keys to every UI element is inefficient. By streamlining these actions under the "Q" key, space has been cleare...