refactor: move debug-only logic to runtime condition in SerilogDemo page

src/NexusReader.UI.Shared/Pages/SerilogDemo.razor

@@ -2,7 +2,8 @@
 @inject ILogger<SerilogDemo> Logger
 @inject IJSRuntime JSRuntime
 
-#if DEBUG
+@if (_isDebug)
+{
     <div class="serilog-demo-container">
         <div class="header-card glass-panel">
             <div class="header-content">
@@ -88,30 +89,41 @@
             </div>
         </div>
     </div>
-#else
+}
+else
+{
     <div class="serilog-demo-container">
         <div class="glass-panel" style="text-align: center; padding: 3rem;">
             <h2>Diagnostics Unavailable</h2>
             <p>This page is only available in DEBUG builds.</p>
         </div>
     </div>
-#endif
-
+}
 
 @code {
 #if DEBUG
+    private readonly bool _isDebug = true;
+#else
+    private readonly bool _isDebug = false;
+#endif
+
     private void LogInfo()
     {
+#if DEBUG
         Logger.LogInformation("Structured native log triggered by user from SerilogDemo. Button: LogInfo");
+#endif
     }
 
     private void LogWarning()
     {
+#if DEBUG
         Logger.LogWarning("Potential warning log triggered from Blazor razor component at {Time}", DateTime.UtcNow);
+#endif
     }
 
     private void LogError()
     {
+#if DEBUG
         try
         {
             throw new InvalidOperationException("Simulated native C# operation exception triggered in Diagnostic dashboard.");
@@ -120,16 +132,22 @@
         {
             Logger.LogError(ex, "Captured exception successfully in native Serilog pipeline!");
         }
+#endif
     }
 
     private async Task TriggerJsLog()
     {
+#if DEBUG
         await JSRuntime.InvokeVoidAsync("console.log", "Intercepted JS console statement from Blazor WebView interop trigger!");
+#endif
+        await Task.CompletedTask;
     }
 
     private async Task TriggerJsException()
     {
+#if DEBUG
         await JSRuntime.InvokeVoidAsync("eval", "throw new Error('Simulated runtime JS Exception triggered from Blazor UI button click!');");
-    }
 #endif
+        await Task.CompletedTask;
+    }
 }