Empty figures say so in one line

When a figure has nothing to count, its page now shows a single line where the register would be — what is missing and, on figures read over a date range, what to change to see more: “No lead was sourced in this range — widen the range.” If the figure left some records out, the line says so underneath.

• Every figure page shows this line in the same shape, matching the empty states elsewhere in the platform.
• Register tables no longer appear empty: a figure with nobody in it shows the line instead of a table with no rows. A search that matches nothing still shows the table, with “Nothing matches this filter.”
• Admin and expert figures state their empty case in fewer words — for example, “Nobody holds an account in this tenant yet” and “Nothing is in your queue.”