Unify Ctrl+S as 'Salvar Tudo' — saves OTB, DAT, SPR and Map at once

New SaveAll command triggered by Ctrl+S saves all loaded files:
OTB + DAT + SPR (via SaveClientFilesIfLoaded) and Map (OTBM).
Menu now shows 'Salvar Tudo' instead of separate Save/Save SPR/Save Map items.

Author: BrewertonSantos

src/App/MainWindow.axaml

@@ -233,12 +233,10 @@
           <MenuItem.Icon><i:Icon Value="fa-solid fa-map" FontSize="14" Foreground="#cdd6f4"/></MenuItem.Icon>
         </MenuItem>
         <Separator/>
-        <MenuItem Header="Save" Command="{Binding SaveOtbCommand}" InputGesture="Ctrl+S">
+        <MenuItem Header="Salvar Tudo" Command="{Binding SaveAllCommand}" InputGesture="Ctrl+S">
           <MenuItem.Icon><i:Icon Value="fa-solid fa-floppy-disk" FontSize="14" Foreground="#89b4fa"/></MenuItem.Icon>
         </MenuItem>
         <MenuItem Header="Save As..." Command="{Binding SaveOtbAsCommand}" InputGesture="Ctrl+Shift+S"/>
-        <MenuItem Header="Save SPR" Command="{Binding SaveSprCommand}"/>
-        <MenuItem Header="Save Map" Command="{Binding SaveMapCommand}"/>
         <Separator/>
         <MenuItem Header="Export Selected..." Command="{Binding ExportThingCommand}" InputGesture="Ctrl+E">
           <MenuItem.Icon><i:Icon Value="fa-solid fa-file-export" FontSize="14" Foreground="#a6e3a1"/></MenuItem.Icon>

src/App/ViewModels/MainWindowViewModel.cs

@@ -2486,6 +2486,46 @@ private void LoadBrushDatabase()
         }
     }
 
+    [RelayCommand]
+    private async Task SaveAllAsync()
+    {
+        var saved = new List<string>();
+
+        try
+        {
+            // 1. OTB + DAT + SPR
+            if (_otbData != null && _otbPath != null)
+            {
+                foreach (var vm in _allItems)
+                    vm.ApplyToModel();
+
+                OtbFile.Save(_otbPath, _otbData);
+                SaveClientFilesIfLoaded();
+                HasUnsavedChanges = false;
+                saved.Add("OTB");
+                if (_datData != null) saved.Add("DAT");
+                if (_sprFile != null) saved.Add("SPR");
+            }
+
+            // 2. Map
+            if (MapData != null && !string.IsNullOrEmpty(MapFilePath))
+            {
+                OtbmFile.Save(MapFilePath, MapData);
+                MapTileCount = MapData.Tiles.Count;
+                MapHasUnsavedChanges = false;
+                saved.Add("Map");
+            }
+
+            StatusText = saved.Count > 0
+                ? $"Saved: {string.Join(", ", saved)}"
+                : "Nothing to save";
+        }
+        catch (Exception ex)
+        {
+            StatusText = $"Save error: {ex.Message}";
+        }
+    }
+
     [RelayCommand]
     private async Task SaveOtbAsync()
     {