Preserve QWord caret while typing

src/components/AppShell.tsx

@@ -12,6 +12,7 @@ import type { AppId } from "../types";
 
 interface AppShellProps {
   activeApp: AppId;
+  windowTitle?: string;
   status: {
     savedLabel: string;
     updatedAt?: string;
@@ -37,8 +38,9 @@ function keepActiveEditorFocus(event: MouseEvent<HTMLButtonElement>) {
   event.preventDefault();
 }
 
-export function AppShell({ activeApp, status, children }: AppShellProps) {
+export function AppShell({ activeApp, windowTitle, status, children }: AppShellProps) {
   const statusClassName = ["statusbar", status.className].filter(Boolean).join(" ");
+  const displayWindowTitle = windowTitle?.trim() || appTitles[activeApp];
 
   return (
     <div className="qoffice-shell">
@@ -58,7 +60,7 @@ export function AppShell({ activeApp, status, children }: AppShellProps) {
               <ChevronDown size={14} />
             </button>
           </div>
-          <strong className="window-title">{appTitles[activeApp]}</strong>
+          <strong className="window-title">{displayWindowTitle}</strong>
           <div className="titlebar-actions">
             <label className="command-search">
               <Search size={16} />