Fix bool member-access query push-down

Author: mrdevrobot

src/BLite.Client/Internal/QueryModelToDescriptorConverter.cs

@@ -59,6 +59,7 @@ private static FilterNode ConvertFilter(Expression expr)
             BinaryExpression binary => ConvertBinary(binary),
             UnaryExpression { NodeType: ExpressionType.Not } unary => ConvertNot(unary),
             MethodCallExpression call => ConvertMethodCall(call),
+            MemberExpression member => ConvertMemberAccess(member),
             // Handle invocations wrapping lambdas (from chained Where)
             InvocationExpression inv => ConvertFilter(inv.Expression is LambdaExpression l ? l.Body : inv),
             _ => throw new NotSupportedException(
@@ -194,6 +195,23 @@ private static FilterNode ConvertMethodCall(MethodCallExpression call)
             $"Method '{call.Method.DeclaringType?.Name}.{methodName}' is not supported for remote query push-down.");
     }
 
+    private static FilterNode ConvertMemberAccess(MemberExpression member)
+    {
+        var field = ExtractMemberName(member);
+        if (field is not null && member.Type == typeof(bool))
+        {
+            return new BinaryFilter
+            {
+                Field = field,
+                Op = FilterOp.Eq,
+                Value = ScalarValue.From(true)
+            };
+        }
+
+        throw new NotSupportedException(
+            $"Member access '{member}' is not supported for remote query push-down.");
+    }
+
     // ── Projection conversion ─────────────────────────────────────────────────
 
     private static ProjectionSpec ConvertProjection(LambdaExpression selectLambda)

tests/BLite.Client.IntegrationTests/Infrastructure/TestProduct.cs

@@ -24,4 +24,6 @@ public class TestProduct
     public decimal Price { get; set; }
 
     public int Stock { get; set; }
+
+    public bool Active { get; set; }
 }

tests/BLite.Client.IntegrationTests/QueryableTests.cs

@@ -42,7 +42,8 @@ await col.InsertAsync(new TestProduct
                 Id    = i,
                 Name  = $"Product{i:D2}",
                 Price = i * 10.0m,
-                Stock = i * 2
+                Stock = i * 2,
+                Active = i % 2 == 0
             });
 
         return (client, col);
@@ -65,6 +66,20 @@ public async Task AsQueryable_Where_PushesFilterToServer()
         Assert.All(results, p => Assert.True(p.Stock > 4));
     }
 
+    [Fact]
+    public async Task AsQueryable_Where_BooleanMemberAccess_PushesFilterToServer()
+    {
+        var (client, col) = await SetupWithProductsAsync();
+        await using var _ = client;
+
+        var results = await col.AsQueryable()
+            .Where(p => p.Active)
+            .ToListAsync();
+
+        Assert.Equal(2, results.Count);
+        Assert.All(results, p => Assert.True(p.Active));
+    }
+
     [Fact]
     public async Task AsQueryable_OrderBy_ReturnsOrderedResults()
     {