Both bugs had the same cause: light colours were set with inline style
attributes, which outrank the theme rules in base.html and so survived the
dark theme. Text that inherits --text-color then became light-on-light.
* manage_player.html: the delete confirmation modal used an inline
background-color of #fefefe with the body's dark-mode text colour, making
the message unreadable in dark mode. Rebuilt it with .modal-* classes
driven by the base.html CSS variables (and dark-mode variants for the
title, warning and player name).
* admin/maintenance.html: the "Automatic reset interval" panel, table
headers and JS-rendered rows/tables hardcoded #f8f9fa/#e2e8f0/#dee2e6.
Switched them to --bg-color / --card-bg / --border-color /
--text-secondary and added a themed .maint-badge-pending.
Verified with computed styles in both themes; light mode is unchanged.
ske087
5b69ccb02b