feat: update Qodana configuration to disable failure conditions and improve build stability

refactor: enhance Bilateral and SMA indicators to handle edge cases and improve state management
refactor: clean up whitespace and formatting in various test files for consistency

lib/trends/bilateral/Bilateral.Quantower.Tests.cs

@@ -113,7 +113,6 @@ public class BilateralIndicatorTests
         Assert.True(double.IsFinite(secondValue));
     }
 
-
     [Fact]
     public void BilateralIndicator_MultipleUpdates_ProducesCorrectSequence()
     {

lib/trends/bilateral/Bilateral.Tests.cs

@@ -106,6 +106,37 @@ public class BilateralTests
         Assert.False(indicator.IsHot);
         Assert.Equal(1, indicator.Update(new TValue(DateTime.UtcNow, 1)).Value); // Center val 1, weights 0? No, center val is returned if weights 0.
     }
+
+    [Fact]
+    public void Update_IsNew_False_OnEmptyBuffer_DoesNotCrash()
+    {
+        // Test edge case: calling Update with isNew:false before any isNew:true
+        var indicator = new Bilateral(3);
+        
+        // This should not crash - buffer is empty, so we treat it as first value
+        var result = indicator.Update(new TValue(DateTime.UtcNow, 5.0), isNew: false);
+        
+        // Should have added the value to the buffer
+        Assert.True(double.IsFinite(result.Value));
+        Assert.Equal(5.0, result.Value); // Single value, so result is that value
+    }
+
+    [Fact]
+    public void Update_IsNew_False_AfterReset_DoesNotCrash()
+    {
+        // Test edge case: calling Update with isNew:false after Reset
+        var indicator = new Bilateral(3);
+        
+        indicator.Update(new TValue(DateTime.UtcNow, 1));
+        indicator.Update(new TValue(DateTime.UtcNow, 2));
+        indicator.Reset();
+        
+        // Buffer is now empty, isNew:false should not crash
+        var result = indicator.Update(new TValue(DateTime.UtcNow, 7.0), isNew: false);
+        
+        Assert.True(double.IsFinite(result.Value));
+        Assert.Equal(7.0, result.Value);
+    }
     
     [Fact]
     public void AllModes_ProduceSameResult()

lib/trends/bilateral/Bilateral.Validation.Tests.cs

@@ -191,4 +191,3 @@ public sealed class BilateralValidationTests : IDisposable
         }
     }
 }
-

lib/trends/bilateral/Bilateral.cs

@@ -168,11 +168,21 @@ public sealed class Bilateral : AbstractBase
             _state.SumSq = currentSumSq;
             
             double val = GetValidValue(input.Value);
-            double oldNewest = _buffer.Newest; // Get current newest before overwriting
-            _buffer.UpdateNewest(val);
             
-            _state.SumSq -= (oldNewest * oldNewest);
-            _state.SumSq += (val * val);
+            // Defensive check: if buffer is empty, treat as first value
+            if (_buffer.Count == 0)
+            {
+                _buffer.Add(val);
+                _state.SumSq += (val * val);
+            }
+            else
+            {
+                double oldNewest = _buffer.Newest; // Get current newest before overwriting
+                _buffer.UpdateNewest(val);
+                
+                _state.SumSq -= (oldNewest * oldNewest);
+                _state.SumSq += (val * val);
+            }
         }
 
         double result = CalculateBilateral();