fix(game): correct turn progression and action buttons

📌 Description

fix(game): complete bot gameplay fixes

• Fix turn order after bot fold (game no longer goes to showdown)
• Ensure player gets turn after bot action
• Add proper phase progression (preflop → flop → turn → river → showdown)
• Fix timer activation on player turn
• Add debug logs for turn tracking
• Implement correct heads-up poker rules (SB first preflop, BB first postflop)
• Handle auto-CHECK/auto-FOLD on timeout

Now bot gameplay works as expected: bot plays → player turn → buttons clickable → timer visible → actions work → next player

🔗 Lien vers l'issue

✅ Type de changement

• Feature (nouvelle fonctionnalité)
• Fix (correction de bug)
• Refactor (pas de changement fonctionnel)
• Docs (documentation)
• Chore (maintenance technique)
• Hotfix (urgence)

🧪 Comment tester

✅ Checklist

• Tests unitaires ajoutés/mis à jour
• Documentation mise à jour
• Pipeline CI vert
• Relu par un reviewer

👥 Reviewers requis

• Backend (@azra, @soheil)
• Frontend (@mohamed, @yigit)
• Sécurité (@linda, @massi)
• BDD (@elhadj)

🚨 Impact potentiel

• Breaking change
• Performance
• Sécurité