code completion works

Inspectron.PrintServer.TemplateEditor/Components/Pages/Home.razor

@@ -2,14 +2,18 @@
 @using BlazorMonaco
 @using BlazorMonaco.Editor
 @using BlazorMonaco.Languages
+@using CommunityToolkit.Maui.Storage
 @using Inspectron.PrintServer.TemplateEditor.Services
 @inject IJSRuntime JSRuntime
 
 <div class="editor-container">
     <div class="toolbar">
-        <button class="toolbar-btn" title="New">New</button>
-        <button class="toolbar-btn" title="Open">Open</button>
-        <button class="toolbar-btn" title="Save">Save</button>
+        <button class="toolbar-btn" title="New" @onclick="NewFileAsync">New</button>
+        <button class="toolbar-btn" title="Open" @onclick="OpenFileAsync">Open</button>
+        <button class="toolbar-btn" title="Save" @onclick="SaveFileAsync">Save</button>
+        <span class="file-indicator" title="@(_currentFilePath ?? "Untitled")">
+            @FileDisplayName@(HasUnsavedChanges ? " *" : "")
+        </span>
         <div class="toolbar-separator"></div>
         <button class="toolbar-btn" title="Load JSON data file for expression completions" @onclick="LoadJsonAsync">Load JSON</button>
         @if (!string.IsNullOrEmpty(_loadedJsonFile))
@@ -41,6 +45,15 @@
     private string? _loadedJsonFile;
     private readonly TemplateCompletionProvider _completionProvider = new();
 
+    private string? _currentFilePath;
+    private string _savedContent = "";
+
+    private bool HasUnsavedChanges => _editorContent != _savedContent;
+
+    private string FileDisplayName => _currentFilePath is not null
+        ? Path.GetFileName(_currentFilePath)
+        : "Untitled";
+
     private StandaloneEditorConstructionOptions EditorConstructionOptions(StandaloneCodeEditor editor)
     {
         return new StandaloneEditorConstructionOptions
@@ -76,6 +89,77 @@
         _editorContent = await _editor.GetValue();
     }
 
+    private async Task NewFileAsync()
+    {
+        _currentFilePath = null;
+        _savedContent = "";
+        _editorContent = "";
+        await _editor.SetValue("");
+    }
+
+    private async Task OpenFileAsync()
+    {
+        try
+        {
+            var result = await FilePicker.Default.PickAsync(new PickOptions
+            {
+                PickerTitle = "Select an XML template file",
+                FileTypes = new FilePickerFileType(new Dictionary<DevicePlatform, IEnumerable<string>>
+                {
+                    { DevicePlatform.WinUI, new[] { ".xml" } },
+                    { DevicePlatform.macOS, new[] { "xml" } },
+                    { DevicePlatform.iOS, new[] { "public.xml" } },
+                    { DevicePlatform.Android, new[] { "text/xml" } },
+                })
+            });
+
+            if (result is null)
+                return;
+
+            var content = await File.ReadAllTextAsync(result.FullPath);
+            _currentFilePath = result.FullPath;
+            _savedContent = content;
+            _editorContent = content;
+            await _editor.SetValue(content);
+        }
+        catch (Exception)
+        {
+            // User cancelled or file read failed
+        }
+    }
+
+    private async Task SaveFileAsync()
+    {
+        if (_currentFilePath is not null)
+        {
+            await File.WriteAllTextAsync(_currentFilePath, _editorContent);
+            _savedContent = _editorContent;
+        }
+        else
+        {
+            await SaveAsAsync();
+        }
+    }
+
+    private async Task SaveAsAsync()
+    {
+        try
+        {
+            using var stream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(_editorContent));
+            var result = await FileSaver.Default.SaveAsync("template.xml", stream, CancellationToken.None);
+
+            if (result.IsSuccessful)
+            {
+                _currentFilePath = result.FilePath;
+                _savedContent = _editorContent;
+            }
+        }
+        catch (Exception)
+        {
+            // User cancelled or save failed
+        }
+    }
+
     private async Task LoadJsonAsync()
     {
         try