fix: update tooltip - hidden folders not visible in native dialogs

The Cmd+Shift+. shortcut does not work in NSOpenPanel dialogs used by file_picker.
Path input field is the recommended way to access hidden folders like ~/.claude.
Signed, notarized, stapled DMG

lib/screens/home/home_screen.dart

@@ -663,9 +663,12 @@ class _HomeScreenState extends State<HomeScreen> {
             ),
             const SizedBox(width: 8),
             Tooltip(
-              message: 'Press Cmd+Shift+. in dialogs to show hidden folders',
+              message: 'Type a path with hidden folders directly in the input field',
+              child: Padding(
+                padding: const EdgeInsets.only(left: 4),
                 child: Icon(Icons.info_outline, size: 14, color: AppColors.textMuted),
               ),
+            ),
           ],
         ),
       ],