Refactored bindings to use Binding class for consistency across modal and screen components.

src/pilgrim/ui/screens/new_diary_modal.py

@@ -1,11 +1,13 @@
 from textual.app import ComposeResult
+from textual.binding import Binding
 from textual.containers import Vertical, Horizontal
 from textual.screen import ModalScreen
 from textual.widgets import Label, Input, Button
 
+
 class NewDiaryModal(ModalScreen[str]):
     BINDINGS = [
-        ("escape", "cancel", "Cancel"),
+        Binding("escape", "cancel", "Cancel"),
     ]
     def __init__(self):
         super().__init__()