Update logger SignalR hub to use LogItemClient wire type

- Switched LoggerSignalRHub and SignaRClientLogItemWriter to use LogItemClient as the AcBinary wire type for symmetric client-server logging.
- Added LogItemClient.cs with AcBinary serialization attribute.
- Added direct AyCode.Entities.dll reference for base type resolution.
- Improved README docs for logger hub, client writer, and DI constructor fix.
- Updated build/test scripts and removed obsolete FbLogItem.cs.

.claude/settings.local.json

@@ -88,7 +88,15 @@
       "PowerShell($dll = \"C:\\\\Users\\\\Fullepi\\\\.nuget\\\\packages\\\\devexpress.blazor\\\\25.1.5\\\\lib\\\\net8.0\\\\DevExpress.Blazor.v25.1.dll\"; $bytes = [System.IO.File]::ReadAllBytes\\($dll\\); $text = [System.Text.Encoding]::ASCII.GetString\\($bytes\\); @\\(\"BodyTemplate\",\"get_CssClass\",\"MessageBoxOptions\",\"TitleTemplate\"\\) | ForEach-Object { \"$\\($_\\): $\\($text.Contains\\($_\\)\\)\" })",
       "PowerShell(dotnet test \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services.Tests\\\\AyCode.Services.Tests.csproj\" --filter \"FullyQualifiedName~EkaerTradeCardValidatorTests\" --nologo -v quiet 2>$null)",
       "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services.Server\\\\AyCode.Services.Server.csproj\" --nologo -v quiet 2>$null)",
-      "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services\\\\AyCode.Services.csproj\" -c Debug --nologo -v quiet 2>$null)"
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services\\\\AyCode.Services.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services.Server\\\\AyCode.Services.Server.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(\"=== Services.Server ===\")",
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Mango\\\\Source\\\\FruitBankHybridApp\\\\FruitBank.Common\\\\FruitBank.Common.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Mango\\\\Source\\\\FruitBankHybridApp\\\\FruitBank.Common.Server\\\\FruitBank.Common.Server.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(\"=== FruitBank.Common.Server ===\")",
+      "PowerShell(Remove-Item \"H:\\\\Applications\\\\Mango\\\\Source\\\\FruitBankHybridApp\\\\FruitBank.Common\\\\Loggers\\\\FbLogItem.cs\" -Confirm:$false)",
+      "PowerShell(\"=== Server ===\")",
+      "PowerShell(\"=== Generated ===\")"
     ]
   }
 }

FruitBank.Common.Server/FruitBank.Common.Server.csproj

@@ -29,6 +29,10 @@
 		<Reference Include="AyCode.Core">
 			<HintPath>..\..\..\..\Aycode\Source\AyCode.Core\AyCode.Services.Server\bin\FruitBank\$(Configuration)\net9.0\AyCode.Core.dll</HintPath>
 		</Reference>
+		<!-- FbLogItem : AcLogItemClient — a hub TLogItem-constraintjéhez kell a bázistípus assembly-je (a DLL-referencia nem tranzitív). -->
+		<Reference Include="AyCode.Entities">
+			<HintPath>..\..\..\..\Aycode\Source\AyCode.Core\AyCode.Services.Server\bin\FruitBank\$(Configuration)\net9.0\AyCode.Entities.dll</HintPath>
+		</Reference>
 		<Reference Include="AyCode.Interfaces">
 		  <HintPath>..\..\..\..\Aycode\Source\AyCode.Core\AyCode.Services.Server\bin\FruitBank\$(Configuration)\net9.0\AyCode.Interfaces.dll</HintPath>
 		</Reference>

FruitBank.Common.Server/Services/SignalRs/LoggerSignalRHub.cs

@@ -1,8 +1,11 @@
-using AyCode.Services.Server.SignalRs;
+using AyCode.Services.Server.SignalRs;
+using FruitBank.Common.Loggers;
 using FruitBank.Common.Server.Services.Loggers;
 
 namespace FruitBank.Common.Server.Services.SignalRs;
 
 
-public class LoggerSignalRHub(LoggerToLoggerApiController logger) : AcLoggerSignalRHub<LoggerToLoggerApiController>(logger)
+// LogItemClient: a kliens-writerrel (SignaRClientLogItemWriter : AcSignaRClientLogItemWriter<LogItemClient>) azonos
+// wire-típus — a SignalR erre deserializál, AcBinary-nál a LogItemClient generált serializere fut.
+public class LoggerSignalRHub(LoggerToLoggerApiController logger) : AcLoggerSignalRHub<LoggerToLoggerApiController, LogItemClient>(logger)
 { }

FruitBank.Common/Loggers/LogItemClient.cs

@@ -0,0 +1,16 @@
+using AyCode.Core.Serializers.Attributes;
+using AyCode.Entities.LogItems;
+
+namespace FruitBank.Common.Loggers;
+
+/// <summary>
+/// A FruitBank kliens↔szerver log-feltöltés wire-típusa (writer és loggerHub ugyanezt használja — szimmetrikus wire).
+/// Az AcLogItemClient az AyCode.Entities generator-mentes rétegében él; itt, a FruitBank.Common-ban (ahol az
+/// AcBinary source-generator fut) kap generált serializert — így a loggerHub AcBinary-protokollal mehet.
+/// A generator az örökölt propertyket is felveszi (derived → base sorrend, runtime-kompatibilis).
+/// Feature-ök kikapcsolva (false): kis, lapos POCO — id/ref/intern/metadata nem kell, a sorosítás így a leggyorsabb.
+/// </summary>
+[AcBinarySerializable(false)]
+public class LogItemClient : AcLogItemClient
+{
+}

FruitBank.Common/Loggers/SignaRClientLogItemWriter.cs

@@ -1,17 +1,38 @@
-using AyCode.Core.Enums;
+using AyCode.Core.Enums;
 using AyCode.Core.Loggers;
+using AyCode.Core.Serializers.Binaries;
 using AyCode.Services.Loggers;
+using AyCode.Services.SignalRs;
+using Microsoft.Extensions.Logging.Abstractions;
 
 namespace FruitBank.Common.Loggers
 {
-    public class SignaRClientLogItemWriter : AcSignaRClientLogItemWriter
+    /// <summary>
+    /// FruitBank log-feltöltő: LogItemClient wire-típussal, AcBinary-protokollon (egységes a fbHub-bal).
+    /// Cél: {BaseUrl}/loggerHub — a BaseUrl-t a host hidratálja az appsettings-ből.
+    /// </summary>
+    public class SignaRClientLogItemWriter : AcSignaRClientLogItemWriter<LogItemClient>
     {
         public SignaRClientLogItemWriter() : this(AppType.Web, LogLevel.Detail, null)
         {
         }
-        public SignaRClientLogItemWriter(AppType appType, LogLevel logLevel, string? categoryName = null) : base($"{FruitBankConstClient.BaseUrl}/{FruitBankConstClient.LoggerHubName}", appType, logLevel, categoryName)
+        public SignaRClientLogItemWriter(AppType appType, LogLevel logLevel, string? categoryName = null)
+            : base($"{FruitBankConstClient.BaseUrl}/{FruitBankConstClient.LoggerHubName}", appType, logLevel, categoryName, CreateProtocolOptions())
         {
         }
-    }
 
+        // ⚠️ VÉGTELEN-CIKLUS VESZÉLY — NE ADJ LOGGERT A PROTOKOLLNAK! ⚠️
+        // Ez a writer maga A log-feltöltő csatorna. Ha a protokoll loggert kapna (LoggerClient, ILogger, bármi,
+        // ami ebbe a writerbe torkollik), akkor minden feltöltés sorosítása ÚJABB log-sorokat termelne
+        // (Serialize start / WriteArgument / ...), amiket ez a writer megint felküldene → sorosítás → log → ...
+        // → robbanó visszacsatolás, a kliens másodpercek alatt megfullad.
+        // Ezért a Logger EXPLICIT NullLogger.Instance (nem null! — a null-t az AddAcBinaryProtocol ??= fallbackje
+        // a DI ILogger<AcBinaryHubProtocol>-jával pótolná, ami visszahozná a hurkot).
+        // Ugyanezért erre a hub-builderre AddAcDefaults/ConfigureLogging SOHA nem kerülhet.
+        private static AcBinaryHubProtocolOptions CreateProtocolOptions() => new()
+        {
+            ProtocolMode = BinaryProtocolMode.Bytes, // WASM-safe, ugyanaz, mint az fbHub-on
+            Logger = NullLogger.Instance,            // süket logger — ld. a fenti figyelmeztetést
+        };
+    }
 }