changed ui.py to add command palettes commands and changed diary_list_screen.py to add access to the about_screen.py

src/pilgrim/ui/screens/diary_list_screen.py

@@ -8,6 +8,7 @@ from textual.binding import Binding
 from textual.containers import Vertical, Container, Horizontal
 
 from pilgrim.models.travel_diary import TravelDiary
+from pilgrim.ui.screens.about_screen import AboutScreen
 from pilgrim.ui.screens.edit_diary_modal import EditDiaryModal
 from pilgrim.ui.screens.new_diary_modal import NewDiaryModal
 
@@ -283,4 +284,7 @@ class DiaryListScreen(Screen):
 
     def action_open_selected_diary(self):
         """Ação do binding ENTER"""
-        self.action_open_diary()
+        self.action_open_diary()
+
+    def action_about_cmd(self):
+        self.app.push_screen(AboutScreen())