refactor: Improve trade direction inference and add debug logging in position performance calculation

src/pages/journal/trading_journal_page.py

@@ -21,7 +21,15 @@ def calculate_position_performance(trades):
             shares = float(trade['shares'])
             price = float(trade['entry_price'])
             
-            direction = str(trade.get('direction', '')).lower()
+            # If no direction field, infer from exit_price
+            if 'direction' not in trade or not trade['direction']:
+                # If no exit_price, assume it's a buy
+                if trade.get('exit_price') is None:
+                    direction = 'buy'
+                else:
+                    direction = 'sell'
+            else:
+                direction = str(trade.get('direction', '')).lower()
             
             if direction == 'buy':
                 total_bought += shares
@@ -29,10 +37,17 @@ def calculate_position_performance(trades):
             elif direction == 'sell':
                 total_sold += shares
                 total_proceeds += shares * price
+                
+            print(f"Processing trade: Direction={direction}, Shares={shares}, Price={price}")  # Debug
+            
         except (ValueError, TypeError) as e:
             print(f"Error processing trade: {e}")
             continue
     
+    print(f"Performance calculation results:")  # Debug
+    print(f"Total bought: {total_bought} shares at total cost: ${total_cost}")  # Debug
+    print(f"Total sold: {total_sold} shares with total proceeds: ${total_proceeds}")  # Debug
+    
     # Avoid division by zero
     if total_bought == 0:
         return {