add view mode as default, open new notes in edit mode with cursor ready

- Introduce NoteMode enum { view, edit, preview } replacing the old bool
- Default mode when opening a note is view (syntax-highlighted, read-only)
- Menu now shows all three modes with a checkmark on the active one
- Save and autosave menu items disabled outside edit mode
- New notes open in edit mode with cursor positioned after the header
  and keyboard focused, ready to type

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/note_editor.dart

@@ -17,28 +17,35 @@ class NoteEditorScreen extends StatefulWidget {
   final String? notesDirectoryPath; // ✅ Add this
   final bool isDarkMode;
 
+  final NoteMode initialMode;
+
   const NoteEditorScreen({
     super.key,
     required this.note,
     required this.isDarkMode,
     required this.notesDirectoryPath,
+    this.initialMode = NoteMode.view,
   });
 
   @override
   State<NoteEditorScreen> createState() => _NoteEditorScreenState();
 }
 
+enum NoteMode { view, edit, preview }
+
 class _NoteEditorScreenState extends State<NoteEditorScreen> {
   late CodeController _controller;
   late String _initialContent;
-  bool _isPreviewMode = false;
+  late NoteMode _mode;
+  final FocusNode _editorFocusNode = FocusNode();
   bool _isLoading = true;
-  bool _autoSaveEnabled = false; // Controlled by user toggle
+  bool _autoSaveEnabled = false;
   double _fontSize = 16.0;
 
   @override
   void initState() {
     super.initState();
+    _mode = widget.initialMode;
     _loadPreferences();
     _loadNoteContent();
   }
@@ -74,10 +81,18 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
       _controller.addListener(_onTextChanged);
       _isLoading = false;
     });
+
+    if (widget.initialMode == NoteMode.edit) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        _controller.selection =
+            TextSelection.collapsed(offset: _controller.text.length);
+        _editorFocusNode.requestFocus();
+      });
+    }
   }
 
   void _onTextChanged() {
-    if (_autoSaveEnabled && _controller.text != _initialContent) {
+    if (_mode == NoteMode.edit && _autoSaveEnabled && _controller.text != _initialContent) {
       _saveNote();
     }
   }
@@ -105,7 +120,7 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
   }
 
   Future<bool> _onWillPop() async {
-    if (_controller.text == _initialContent) return true; // No changes, exit
+    if (_mode != NoteMode.edit || _controller.text == _initialContent) return true;
 
     return await showDialog(
       context: context,
@@ -144,6 +159,7 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
   void dispose() {
     _controller.removeListener(_onTextChanged);
     _controller.dispose();
+    _editorFocusNode.dispose();
     super.dispose();
   }
 
@@ -187,10 +203,14 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
                     case 'Toggle Autosave':
                       _setAutoSaveEnabled(!_autoSaveEnabled);
                       break;
-                    case 'Toggle Preview':
+                    case 'Mode View':
-                      setState(() {
+                      setState(() { _mode = NoteMode.view; });
-                        _isPreviewMode = !_isPreviewMode;
+                      break;
-                      });
+                    case 'Mode Edit':
+                      setState(() { _mode = NoteMode.edit; });
+                      break;
+                    case 'Mode Preview':
+                      setState(() { _mode = NoteMode.preview; });
                       break;
                   }
                 },
@@ -205,6 +225,7 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
                   PopupMenuDivider(),
                   PopupMenuItem<String>(
                     value: 'Save',
+                    enabled: _mode == NoteMode.edit,
                     child: ListTile(
                       leading: Icon(Icons.save_outlined),
                       title: Text("Save"),
@@ -212,6 +233,7 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
                   ),
                   PopupMenuItem<String>(
                     value: 'Toggle Autosave',
+                    enabled: _mode == NoteMode.edit,
                     child: ListTile(
                       leading: Icon(_autoSaveEnabled
                           ? Icons.alarm_off
@@ -250,12 +272,30 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
                   ),
                   PopupMenuDivider(),
                   PopupMenuItem<String>(
-                    value: 'Toggle Preview',
+                    value: 'Mode View',
                     child: ListTile(
-                      leading:
+                      leading: Icon(_mode == NoteMode.view
-                      Icon(_isPreviewMode ? Icons.edit_note_outlined : Icons.visibility_outlined),
+                          ? Icons.check
-                      title:
+                          : Icons.book_outlined),
-                      Text(_isPreviewMode ? "Edit Mode" : "Preview Mode"),
+                      title: Text("View Mode"),
+                    ),
+                  ),
+                  PopupMenuItem<String>(
+                    value: 'Mode Edit',
+                    child: ListTile(
+                      leading: Icon(_mode == NoteMode.edit
+                          ? Icons.check
+                          : Icons.edit_note_outlined),
+                      title: Text("Edit Mode"),
+                    ),
+                  ),
+                  PopupMenuItem<String>(
+                    value: 'Mode Preview',
+                    child: ListTile(
+                      leading: Icon(_mode == NoteMode.preview
+                          ? Icons.check
+                          : Icons.visibility_outlined),
+                      title: Text("Preview Mode"),
                     ),
                   ),
                 ],
@@ -265,7 +305,7 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
         ),
         body: _isLoading
             ? Center(child: CircularProgressIndicator())
-            : _isPreviewMode
+            : _mode == NoteMode.preview
             ? Padding(
           padding: const EdgeInsets.all(16.0),
           child: SingleChildScrollView(
@@ -325,6 +365,8 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
               child: WrappedCodeField(
                 wrap: true,
                 controller: _controller,
+                readOnly: _mode == NoteMode.view,
+                focusNode: _editorFocusNode,
                 textStyle: TextStyle(
                   fontSize: _fontSize,
                 ),

lib/note_list.dart

@@ -449,6 +449,7 @@ Happy note taking! ✨
               note: newNote,
               isDarkMode: widget.isDarkMode,
               notesDirectoryPath: notesDirectoryPath,
+              initialMode: NoteMode.edit,
             ),
           ),
         );