--bg-card is deliberately translucent in dark mode (rgba(0,0,61,0.4)) so cards
glass over the page; --bg-card-solid exists for the things that must not. Two
hand-rolled modal panels used the former, leaving the notification-type and
access-protocol editors transparent over the overlay with the table legible
through them. The shared .modal in style.css already got this right.
Also writes down the page-vs-modal rule the codebase already follows, since
nothing stated it: a record with a detail page gets a routed form page, a lookup
row that only exists inside its list gets a modal over that list. Plus the modal
rules from the overlay-close fix - data entry never closes on a stray click,
confirmations may, and panels are painted solid.
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