fix: Update initial button label to a space character to comply with Discord API requirements

cogs/games/tictactoe_game.py

@@ -5,8 +5,9 @@ from typing import Optional, List
 # --- Tic Tac Toe (Player vs Player) ---
 class TicTacToeButton(ui.Button['TicTacToeView']):
     def __init__(self, x: int, y: int):
-        # Use a blank character for the initial label to avoid large buttons
-        super().__init__(style=discord.ButtonStyle.secondary, label='', row=y)
+        # Use a space character for the initial label to avoid large buttons
+        # Empty string ('') is not allowed as per Discord API requirements
+        super().__init__(style=discord.ButtonStyle.secondary, label=' ', row=y)
         self.x = x
         self.y = y
 
@@ -117,7 +118,7 @@ class TicTacToeView(ui.View):
 # --- Tic Tac Toe Bot Game ---
 class BotTicTacToeButton(ui.Button['BotTicTacToeView']):
     def __init__(self, x: int, y: int):
-        super().__init__(style=discord.ButtonStyle.secondary, label='', row=y)
+        super().__init__(style=discord.ButtonStyle.secondary, label=' ', row=y)
         self.x = x
         self.y = y
         self.position = y * 3 + x  # Convert to position index (0-8) for the TicTacToe engine
@@ -125,12 +126,12 @@ class BotTicTacToeButton(ui.Button['BotTicTacToeView']):
     async def callback(self, interaction: discord.Interaction):
         assert self.view is not None
         view: BotTicTacToeView = self.view
-        
+
         # Check if it's the player's turn
         if interaction.user != view.player:
             await interaction.response.send_message("This is not your game!", ephemeral=True)
             return
-            
+
         # Try to make the move in the game engine
         try:
             view.game.play_turn(self.position)
@@ -141,15 +142,15 @@ class BotTicTacToeButton(ui.Button['BotTicTacToeView']):
             if view.game.is_game_over():
                 await view.end_game(interaction)
                 return
-                
+
             # Now it's the bot's turn - defer without thinking message
             await interaction.response.defer()
             import asyncio
             await asyncio.sleep(1)  # Brief pause to simulate bot "thinking"
-            
+
             # Bot makes its move
             bot_move = view.game.play_turn()  # AI will automatically choose its move
-            
+
             # Update the button for the bot's move
             bot_y, bot_x = divmod(bot_move, 3)
             for child in view.children:
@@ -158,19 +159,19 @@ class BotTicTacToeButton(ui.Button['BotTicTacToeView']):
                     child.style = discord.ButtonStyle.danger
                     child.disabled = True
                     break
-                    
+
             # Check if game is over after bot's move
             if view.game.is_game_over():
                 await view.end_game(interaction)
                 return
-                
+
             # Update the game board for the next player's turn
             await interaction.followup.edit_message(
                 message_id=view.message.id,
                 content=f"Tic Tac Toe: {view.player.mention} (X) vs Bot (O) - Difficulty: {view.game.ai_difficulty.capitalize()}\n\nYour turn!",
                 view=view
             )
-            
+
         except ValueError as e:
             await interaction.response.send_message(f"Error: {str(e)}", ephemeral=True)
 
@@ -185,12 +186,12 @@ class BotTicTacToeView(ui.View):
         for y in range(3):
             for x in range(3):
                 self.add_item(BotTicTacToeButton(x, y))
-                
+
     async def disable_all_buttons(self):
         for item in self.children:
             if isinstance(item, ui.Button):
                 item.disabled = True
-                
+
     def format_board(self) -> str:
         """Format the game board into a string representation."""
         board = self.game.get_board()
@@ -202,10 +203,10 @@ class BotTicTacToeView(ui.View):
             row = [cell.replace('X', '❌').replace('O', '⭕') for cell in row]
             rows.append(' '.join(row))
         return '\n'.join(rows)
-        
+
     async def end_game(self, interaction: discord.Interaction):
         await self.disable_all_buttons()
-        
+
         winner = self.game.get_winner()
         if winner:
             if winner == 'X':  # Player wins
@@ -214,10 +215,10 @@ class BotTicTacToeView(ui.View):
                 content = f"The bot ({self.game.ai_difficulty.capitalize()}) wins! Better luck next time."
         else:
             content = "It's a tie! 🤝"
-            
+
         # Convert the board to a visually appealing format
         board_display = self.format_board()
-        
+
         # Update the message
         try:
             await interaction.followup.edit_message(
@@ -232,7 +233,7 @@ class BotTicTacToeView(ui.View):
                     await self.message.edit(content=f"{content}\n\n{board_display}", view=self)
                 except: pass
         self.stop()
-    
+
     async def on_timeout(self):
         if self.message:
             await self.disable_all_buttons()