Improve resource server initialization and mutex handling

Adds a null check for the resource server after initialization and logs an error if it fails. Changes duplicate launcher instance log from error to info, and wraps mutex release in a try-catch to prevent exceptions if not owned.

WelsonJS.Toolkit/WelsonJS.Launcher/MainForm.cs

@@ -177,6 +177,12 @@ namespace WelsonJS.Launcher
         {
             Program.InitializeResourceServer();
 
+            if (Program._resourceServer == null)
+            {
+                _logger.Error("Resource server failed to initialize.");
+                return false;
+            }
+
             if (!Program._resourceServer.IsRunning())
             {
                 Program._resourceServer.Start(false);

WelsonJS.Toolkit/WelsonJS.Launcher/Program.cs

@@ -32,7 +32,7 @@ namespace WelsonJS.Launcher
             _mutex = new Mutex(true, "WelsonJS.Launcher", out bool createdNew);
             if (!createdNew)
             {
-                _logger.Error("WelsonJS Launcher already running.");
+                _logger.Info("WelsonJS Launcher already running.");
                 return;
             }
 
@@ -42,7 +42,9 @@ namespace WelsonJS.Launcher
             Application.Run(new MainForm(_logger));
 
             // destory the mutex
-            _mutex.ReleaseMutex();
+            try {
+                _mutex.ReleaseMutex();
+            } catch { /* ignore if not owned */ }
             _mutex.Dispose();
         }