Open script service URLs in-app or external

Adds a Service URLs setting (ask / in-Paseo / external browser) that
controls where URLs from running scripts open on desktop. First click
prompts with a "don't ask again" checkbox; in-Paseo opens a workspace
browser tab. Closing a browser tab now clears its session partition.

packages/app/src/components/ui/dropdown-menu.tsx

@@ -62,6 +62,11 @@ interface DropdownMenuContextValue {
 
 const DropdownMenuContext = createContext<DropdownMenuContextValue | null>(null);
 
+export function useDropdownMenuClose(): () => void {
+  const { setOpen } = useDropdownMenuContext("useDropdownMenuClose");
+  return useCallback(() => setOpen(false), [setOpen]);
+}
+
 function useDropdownMenuContext(componentName: string): DropdownMenuContextValue {
   const ctx = useContext(DropdownMenuContext);
   if (!ctx) {