Center map on startup location

Components/Pages/Home.razor

@@ -291,6 +291,10 @@
 
                         <section class="panel-section">
                             <h2>GPS e percorso</h2>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" checked="@ShowGpsPosition" @onchange="ToggleGpsPosition" />
+                                <span>Mostra punto e cerchio GPS</span>
+                            </label>
                             <label class="toggle-line project-save-option">
                                 <input type="checkbox" checked="@TrailEnabled" @onchange="ToggleTrail" />
                                 <span>Registra la traccia mentre cammini</span>
@@ -363,6 +367,7 @@
     private double? CatalogFraction { get; set; }
     private bool CatalogBusy { get; set; }
     private bool GpsActive { get; set; }
+    private bool ShowGpsPosition { get; set; } = true;
     private bool DrawToolsVisible { get; set; }
     private bool TrailEnabled { get; set; }
     private bool LayerPanelOpen { get; set; }
@@ -453,10 +458,36 @@
         if (firstRender)
         {
             await JS.InvokeVoidAsync("lmeMap.init");
+            await CenterOnInitialLocationAsync();
             await MigrateLegacyProjectAsync();
         }
     }
 
+    private async Task CenterOnInitialLocationAsync()
+    {
+        using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(12));
+        try
+        {
+            var location = await LocationService.GetCurrentLocationAsync(timeout.Token);
+            if (location is not null)
+            {
+                await JS.InvokeVoidAsync("lmeMap.showInitialPosition", location);
+            }
+            else
+            {
+                await JS.InvokeVoidAsync("lmeMap.showInfo", "Posizione iniziale non disponibile. La mappa resta utilizzabile normalmente.");
+            }
+        }
+        catch (OperationCanceledException)
+        {
+            await JS.InvokeVoidAsync("lmeMap.showInfo", "Ricerca della posizione iniziale scaduta. Usa Avvia GPS per riprovare.");
+        }
+        catch (Exception error)
+        {
+            await JS.InvokeVoidAsync("lmeMap.showInfo", $"Posizione iniziale non disponibile: {error.GetBaseException().Message}");
+        }
+    }
+
     private async Task MigrateLegacyProjectAsync()
     {
         try
@@ -680,6 +711,12 @@
         }
     }
 
+    private async Task ToggleGpsPosition(ChangeEventArgs args)
+    {
+        ShowGpsPosition = (bool?)args.Value == true;
+        await JS.InvokeVoidAsync("lmeMap.setGpsPositionVisible", ShowGpsPosition);
+    }
+
     private async Task StartGps()
     {
         GpsActive = true;