createInitialModeExpression returns bare JS, not a script tag. Injecting it
via {@html} in svelte:head printed setInitialMode source on customer org
sites. Let ModeWatcher inject the script correctly instead.
Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>