feat: Enhance table creation and error handling in watchlist management

src/trading/watchlist.py

@@ -11,6 +11,9 @@ logger = logging.getLogger(__name__)
 
 def ensure_tables_exist():
     with create_client() as client:
+        # First ensure database exists
+        client.command("CREATE DATABASE IF NOT EXISTS stock_db")
+        
         # Create watchlists table if not exists
         client.command("""
             CREATE TABLE IF NOT EXISTS stock_db.watchlists (
@@ -54,6 +57,9 @@ class WatchlistItem:
 
 def create_watchlist(name: str, strategy: Optional[str] = None) -> int:
     with create_client() as client:
+        # Ensure tables exist before creating new watchlist
+        ensure_tables_exist()
+        
         # Get the next available ID
         result = client.query("SELECT max(id) + 1 as next_id FROM stock_db.watchlists")
         next_id = result.first_row[0] if result.first_row[0] is not None else 1
@@ -124,6 +130,9 @@ def remove_from_watchlist(item_id: int) -> bool:
 def get_watchlist_items(watchlist_id: Optional[int] = None) -> List[WatchlistItem]:
     with create_client() as client:
         try:
+            # Ensure tables exist before querying
+            ensure_tables_exist()
+            
             query = """
                 SELECT i.*, w.name as watchlist_name, w.strategy 
                 FROM stock_db.watchlist_items i
@@ -147,6 +156,7 @@ def get_watchlist_items(watchlist_id: Optional[int] = None) -> List[WatchlistIte
                     entry_price=data['entry_price'],
                     target_price=data['target_price'],
                     stop_loss=data['stop_loss'],
+                    shares=data.get('shares', 0),  # Add default value
                     notes=data['notes'],
                     created_at=data['created_at']
                 ))