feat: Implement menu open/close functionality in HomeScreen for improved user interaction

lib/screens/home_screen.dart

@@ -50,6 +50,26 @@ class _HomeScreenState extends State<HomeScreen> {
   bool _showDeletedNotes = false;
   PointerDeviceKind _lastPointerKind = PointerDeviceKind.mouse;
 
+  void _openMenu() {
+    if (_isMenuOpen) {
+      return;
+    }
+
+    setState(() {
+      _isMenuOpen = true;
+    });
+  }
+
+  void _closeMenu() {
+    if (!_isMenuOpen) {
+      return;
+    }
+
+    setState(() {
+      _isMenuOpen = false;
+    });
+  }
+
   bool _requiresLongPressToDrag(PointerDeviceKind kind) {
     return kind == PointerDeviceKind.touch ||
         kind == PointerDeviceKind.stylus ||
@@ -172,9 +192,7 @@ class _HomeScreenState extends State<HomeScreen> {
   }
 
   Future<void> _handleMenuItemTapped(String item) async {
-    setState(() {
+    _closeMenu();
-      _isMenuOpen = false;
-    });
 
     if (item == 'settings') {
       widget.onOpenSettings();
@@ -546,6 +564,16 @@ class _HomeScreenState extends State<HomeScreen> {
                 },
               ),
               Expanded(
+                child: Listener(
+                  onPointerDown: (PointerDownEvent event) {
+                    if (_lastPointerKind == event.kind) {
+                      return;
+                    }
+
+                    setState(() {
+                      _lastPointerKind = event.kind;
+                    });
+                  },
                   child: Stack(
                     children: [
                       Padding(
@@ -555,6 +583,27 @@ class _HomeScreenState extends State<HomeScreen> {
                         ),
                         child: body,
                       ),
+                      Positioned(
+                        left: 0,
+                        top: 0,
+                        bottom: 0,
+                        width: 28,
+                        child: IgnorePointer(
+                          ignoring:
+                              _isMenuOpen ||
+                              !_requiresLongPressToDrag(_lastPointerKind),
+                          child: GestureDetector(
+                            behavior: HitTestBehavior.translucent,
+                            onHorizontalDragUpdate:
+                                (DragUpdateDetails details) {
+                                  if ((details.primaryDelta ?? 0) > 6) {
+                                    _openMenu();
+                                  }
+                                },
+                            child: const SizedBox.expand(),
+                          ),
+                        ),
+                      ),
                       Positioned.fill(
                         child: IgnorePointer(
                           ignoring: !_isMenuOpen,
@@ -564,11 +613,7 @@ class _HomeScreenState extends State<HomeScreen> {
                             curve: Curves.easeOutCubic,
                             child: GestureDetector(
                               behavior: HitTestBehavior.opaque,
-                            onTap: () {
+                              onTap: _closeMenu,
-                              setState(() {
-                                _isMenuOpen = false;
-                              });
-                            },
                               child: Container(color: Colors.black),
                             ),
                           ),
@@ -595,6 +640,7 @@ class _HomeScreenState extends State<HomeScreen> {
                     ],
                   ),
                 ),
+              ),
             ],
           ),
         ),