Unify all handler signatures and simplify router

- Standardize all handlers to signature: (query, user_id, player, data=None)
- Replace 125-line if/elif chain with HANDLER_MAP dictionary
- Reduce router code by 90 lines (72% reduction)
- Add HANDLER_MAP registry for cleaner organization
- Enable future auto-discovery and decorator patterns
- Maintain full backward compatibility
- Document changes in HANDLER_REFACTORING_V2.md

Benefits:
- O(1) handler lookup vs O(n) if/elif chain
- Add new handlers by just updating the map
- Consistent signature makes code easier to understand
- Opens doors for middleware and hooks

bot/profile_handlers.py

@@ -9,8 +9,9 @@ from data.world_loader import game_world
 logger = logging.getLogger(__name__)
 
 
-async def handle_profile(query, user_id: int, player: dict):
-    """Show player profile and stats."""
+async def handle_profile(query, user_id: int, player: dict, data: list = None):
+    """Display player profile with stats and level info."""
+    from .utils import format_stat_bar
     await query.answer()
     from bot import combat
     from .utils import format_stat_bar, create_progress_bar
@@ -70,8 +71,8 @@ async def handle_profile(query, user_id: int, player: dict):
     )
 
 
-async def handle_spend_points_menu(query, user_id: int, player: dict):
-    """Show stat point spending menu."""
+async def handle_spend_points_menu(query, user_id: int, player: dict, data: list = None):
+    """Show menu for spending attribute points."""
     await query.answer()
     unspent = player.get('unspent_points', 0)