404 page

src/components/NavBar.astro

@@ -3,5 +3,5 @@ export interface Props { showBack?: boolean; }
 const { showBack = true } = Astro.props;
 ---
 <div class="nav-bar">
-  {showBack && <a href="#" onclick="event.preventDefault(); history.back();">[B] Back</a>}
+  {showBack && <a href="/bbs/">[B] Back to Main Menu</a>}
 </div>

src/components/TerminalShell.tsx

@@ -7,7 +7,6 @@ export default function TerminalShell({ children }: { children?: React.ReactNode
       if (e.metaKey || e.ctrlKey || e.altKey) return;
       const entry = findKeyEntry(e.key);
       if (!entry) return;
-      if (entry.href === 'back') { window.history.back(); return; }
       if (entry.href === 'disconnect') { resetConnected(); window.location.href = '/'; return; }
       window.location.href = entry.href;
     }