- Unify /admin/login and /admin/stats into a single /admin page with tabs
(Token stats default, credential login); old paths redirect to /admin.
- Restyle from dark glass-morphism to a clean light theme (single accent,
system font stack, 1px-bordered cards, generous whitespace).
- Humanize token counts with K/M/B suffixes via a humanNum template func.
- Paginate recent requests client-side (10 per page) with a compact pager.
- Drop the database path from the UI.
- Fix mobile horizontal overflow caused by grid min-width:auto.
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