feat: Optimize Game Turn Countdown Timer

[TKanX]

Summary:

Enhanced the game turn countdown timer to provide more prominent and clear notifications as the turn time nears its end.

Related Issues:

Closes #51

Changes:

• GameUI Enhancements:

  • Added color and flashing effect to the showGamePhase function in game.js.
  • Enhanced the showGamePhase function to support custom text colors and a flashing effect.
  • Updated game.ejs to include CSS for the flashing effect using keyframes animation.

• Countdown Timer Updates:

  • Modified the game countdown logic in game.js to provide more detailed and visually distinct countdown messages.
  • Added a new countdown message for 15 seconds remaining.
  • Updated the 5 seconds remaining message to display in red and with a flashing effect.
  • Adjusted the timing and display duration for each countdown message to improve clarity and urgency.
  • Ensured that the "Time's up!" message is displayed in red without flashing.

These changes improve the user experience by providing clearer and more urgent visual feedback during the game's countdown phase.