layout of panels tweaked

maildir_gtd/screens/OpenMessage.py

@@ -1,22 +1,24 @@
 from textual import on
-from textual.app import ComposeResult, Screen
+from textual.app import ComposeResult
+from textual.screen import ModalScreen
 from textual.widgets import Input, Label, Button
-from textual.containers import Horizontal
+from textual.containers import Container
+
+class OpenMessageScreen(ModalScreen[int | None]):
 
-class OpenMessageScreen(Screen[int]):
     def compose(self) -> ComposeResult:
-        yield Horizontal(
+        yield Container(
             Label("📨", id="message_label"),
             Input(placeholder="Enter message ID (integer only)", type="integer", id="open_message_input"),
-            Button("Open", variant="primary", id="open_message_button")
+            Button("Open", variant="primary", id="open_message_button"),
+            id="open_message_container",
+            classes="modal_screen"
         )
 
     @on(Input.Submitted)
     def handle_message_id(self) -> None:
             input_widget = self.query_one("#open_message_input", Input)
-            self.disabled = True
-            self.loading = True
-            message_id = int(input_widget.value)
+            message_id = int(input_widget.value if input_widget.value else 0)
             self.dismiss(message_id)
 
     @on(Input._on_key)