Layout logo on left, menu on right in main screen

Use Horizontal container with logo-panel and menu-panel side by side,
centered vertically in the terminal.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tui/gniza.tcss

@@ -12,11 +12,24 @@ Screen {
 }
 
 /* Main menu */
-#main-menu {
+#main-layout {
-    width: 1fr;
+    width: 100%;
-    max-width: 60;
+    height: 1fr;
+    align: center middle;
+}
+
+#logo-panel {
+    width: auto;
+    height: auto;
+    padding: 1 2;
+    align: center middle;
+}
+
+#menu-panel {
+    width: 1fr;
+    max-width: 40;
+    height: auto;
     padding: 1 2;
-    overflow-y: auto;
 }
 
 #menu-list {
@@ -26,9 +39,7 @@ Screen {
 }
 
 #logo {
-    text-align: center;
     height: auto;
-    padding: 0;
 }
 
 /* Data tables */

tui/screens/main_menu.py

@@ -2,7 +2,7 @@ from textual.app import ComposeResult
 from textual.screen import Screen
 from textual.widgets import Header, Footer, Static, OptionList
 from textual.widgets.option_list import Option
-from textual.containers import Vertical, Center
+from textual.containers import Horizontal, Vertical
 
 LOGO = """\
   [green]
@@ -35,9 +35,10 @@ class MainMenuScreen(Screen):
 
     def compose(self) -> ComposeResult:
         yield Header()
-        with Center():
+        with Horizontal(id="main-layout"):
-            with Vertical(id="main-menu"):
+            with Vertical(id="logo-panel"):
                 yield Static(LOGO, id="logo", markup=True)
+            with Vertical(id="menu-panel"):
                 yield OptionList(
                     *[Option(label, id=mid) for mid, label in MENU_ITEMS],
                     id="menu-list",