Update SpotBot PNL calculation and enhance documentation guidelines

- Added logic to calculate broker PNL when it is zero or invalid, using actual prices for more accurate profit and loss reporting.
- Improved logging to provide detailed information when PNL is calculated, enhancing visibility into trading performance.
- Updated documentation guidelines to discourage unnecessary .md files unless explicitly requested by users.

.cursor/rules/fullstack.mdc

@@ -99,3 +99,4 @@ Key Principles
   - do not implement business logic on the controller, keep the business logic for Service files
   - When adding new property to and Orleans state, always add the property after the last one and increment the id
   - Do not use "npm" use only "bun" command for Web3Proxy and WebApp
+  - Do not write .md documentation useless asked by the user in the prompt

src/Managing.Application/Bots/SpotBot.cs

@@ -984,6 +984,23 @@ public class SpotBot : TradingBotBase
                         var totalBotFees = position.GasFees + position.UiFees;
                         var brokerRealizedPnl = brokerPosition.ProfitAndLoss.Realized;
 
+                        // If broker PNL is 0 or invalid, calculate it ourselves using actual prices
+                        if (brokerRealizedPnl == 0 && brokerPosition.Open != null)
+                        {
+                            var entryPrice = position.Open.Price;
+                            var exitPrice = brokerPosition.Open.Price;
+                            var quantity = position.Open.Quantity;
+                            
+                            // Calculate PNL: (exitPrice - entryPrice) * quantity for LONG
+                            brokerRealizedPnl = TradingBox.CalculatePnL(entryPrice, exitPrice, quantity, 1, position.OriginDirection);
+                            
+                            await LogDebugAsync(
+                                $"⚠️ Broker PNL was 0, calculated from prices\n" +
+                                $"Entry Price: `${entryPrice:F2}` | Exit Price: `${exitPrice:F2}`\n" +
+                                $"Quantity: `{quantity:F8}`\n" +
+                                $"Calculated PNL: `${brokerRealizedPnl:F2}`");
+                        }
+
                         position.ProfitAndLoss = new ProfitAndLoss
                         {
                             Realized = brokerRealizedPnl,