Added the diary select screen

src/pilgrim/ui/ui.py

@@ -1,9 +1,21 @@
+from pathlib import Path
+
 from textual.app import App
 
 from pilgrim.service.servicemanager import ServiceManager
+from pilgrim.ui.screens.diary_list_screen import DiaryListScreen
+
+CSS_FILE_PATH = Path(__file__).parent / "styles" / "pilgrim.css"
 
 
 class UIApp(App):
+    CSS_PATH = CSS_FILE_PATH
+
     def __init__(self,service_manager: ServiceManager):
         super().__init__()
         self.service_manager = service_manager
+
+
+    def on_mount(self) -> None:
+        """Chamado quando a app inicia. Carrega a tela principal."""
+        self.push_screen(DiaryListScreen())