Multiplayer Improvements

• Added chat system for multiplayer (and some singleplayer hint reasoning)
• Added connection quality indicator around player avatar
• Fixed numerous network errors for smoother multiplayer experience
• Lobby is now automatically created when opening Coop popup
• Player flags are now visually distinct in multiplayer (customizable in settings)
• It's now possible to change difficulty without leaving coop session
• Grid is no longer reset when a player leaves multiplayer
• Improved flag protection to prevent both players clicking on the same cell simultaneously
• Added a button in topbar to transform next click into a signal
  

Interface Improvements

• Removed white frame around buttons for cleaner look
• Added scrollbar margins to prevent scrollbars from overlapping cells
• Added customizable signal color options
• Added blur effect when paused instead of plain black overlay
• Fixed loading logo on white theme
• Fixed cases where accent color was black and unreadable (Linux)
• Removed Fusion theme
• Redesigned settings pages for improved coherence and readability
  

Gameplay Features

• Numbers now shake: If a number already has the correct amount of flags but unrevealed cells remain, it will start shaking after some inactivity
• Improved solver: Now explains its reasoning in chat (controllable in settings)
• Added mine density indicator to custom difficulty settings