Season filter dropdowns in all frontend views (Mannschaftswettbewerbe,
Turniere, Teams, Spielerstatistiken, Individualwettbewerbe, Ranglisten)
now navigate via JS URL update (window.location with searchParams) instead
of submitting a POST form. This puts filter_saison_id in the URL, making
season-filtered views bookmarkable and shareable.
The PHP backend already reads filter_saison_id from $_REQUEST (covers GET),
and the cookie is still set as fallback for links that don't carry the param.
For veranstaltungHeaderAlone (single competition detail view), the JS also
resets task=veranstaltungen and removes veranstaltungid on season change,
matching the previous form-based behaviour of navigating back to the list.
https://claude.ai/code/session_01VyKCAgyEfixxR6RhAkBSEL
