Default the IssueResource table to OPEN tickets only with a tab strip to
toggle between Open / Closed / All. Works on both Filament 3 (custom
Blade) and Filament 5 (native records()). Filter is reflected to the URL
as ?state= so deep-links are bookmarkable; default 'open' is omitted for
clean URLs. Counts shown next to each tab.

Cache stores the full set as before — filtering is in-memory on read so
toggling tabs is instant with no extra TicketMate round-trip.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>