api-server gets /create-acc-data and /create-user-data POST routes
that INSERT into the respective tables with required-field validation.
Frontend adds an 'Add' button next to Refresh in each table head;
opens a native <dialog> form with all fields. Inputs use 16px font on
phone (sm:text-[13px] desktop) so iOS doesn't auto-zoom.
A small form-dialog-shell helper centralizes the modal chrome,
field label, and input class so create-account-dialog and
create-user-dialog stay focused on their fields and validation.
Adds × delete button per row in both tables (desktop column +
mobile card header). Click → native <dialog> confirm modal with
Esc/backdrop-cancel, destructive red button, error inline.
Wires deleteAccount/deleteUser Server Actions calling the new
api-server routes; revalidatePath refreshes the list on success.
EditableCell input switches to text-base (16px) on phone (sm:text-[13px]
above 640px), preventing iOS Safari auto-zoom-on-focus that was
shifting the layout when the soft keyboard appeared.
