List of UI Improvements

Make the window resizable and all window elements scalable.

Add window control buttons for minimise and fullscreen (to be added after the previous implementation)

Whenever you hover over the screenshot button, placeholder text is inserted in the chat box but it doesn't go away after you stop hovering, and you have to manually press backspace to remove the text.

After adding your API Key from the overlay, once the overlay is closed and reopened later, it stops showing the placeholder text that your key has been added. Make the placeholder text persistent across sessions.