Feature/chess

[gaganalexa]

F501 + F502 + F503: Chess Game Implementation

Implemented the complete multiplayer chess feature, including gameplay UI, real-time synchronization, and multiple integration fixes discovered during development.

Features Implemented

• Custom chessboard with:

  • Drag-and-drop piece movement
  • Legal move highlighting
  • Captured pieces display
  • Move history tracking

• Full game interface with:

  • Player clocks
  • Game alerts/status handling
  • Draw offer modal
  • Resign functionality

• Multiplayer support with:

  • Lobby and room matching
  • Real-time gameplay using sockets

Logic & Integration Fixes

• Fixed isBoardDisabled logic to allow moves while in "check" state instead of incorrectly disabling the board

• Fixed deriveStatus evaluation order to check for checkmate before stalemate/draw conditions

• Fixed getMaterialAdvantage FEN parsing issue where uppercase pieces were skipped due to case-sensitive includes() checks, causing incorrect captured piece counts

• Fixed capturedColor prop mismatch in GameScreen where player/opponent captured pieces were displayed on the wrong side

• Fixed duplicate game:move socket emissions by restricting emission to the active player through proper playerColor validation in makeMove

• Fixed clock initialization issue where backend time values were sent in milliseconds while frontend expected seconds

• Fixed missing persistence fields in createGame:

  • white_time_left
  • black_time_left
  • last_move_at

  This previously caused immediate timeout behavior after the first move

• Fixed updateGameState partial update handling to prevent unspecified fields from being overwritten with null

• Fixed database capture column type mismatch where the schema expected boolean but the application passed captured piece identifiers