fix: pass 'settings' command string when opening from menu

Changed the command string from 'Settings' to 'settings' when opening
the settings window from the user menu. This ensures clicking edit on
the settings window shows the correct command: 'settings'

src/components/nostr/user-menu.tsx

@@ -487,7 +487,7 @@ export default function UserMenu() {
           <DropdownMenuSeparator />
           <DropdownMenuItem
             className="cursor-crosshair"
-            onClick={() => addWindow("settings", {}, "Settings")}
+            onClick={() => addWindow("settings", {}, "settings")}
           >
             <Settings className="size-4 text-muted-foreground mr-2" />
             <span className="text-sm">Settings</span>