Admins can now enable/disable a sport season from appearing in league
creation and pre-draft league settings. Non-draftable seasons are hidden
from selection but remain visible (and checked) if already linked to an
existing pre-draft league. Leagues in draft status or beyond are unaffected.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Every route now exports a meta function so the browser title bar reflects
the current page. Static pages use fixed titles; dynamic pages pull names
from loader data with a sensible fallback (e.g. league name, sport season
name, team name).
Titles follow the pattern "Page Name - Brackt" for user-facing routes and
"Page Name - Brackt Admin" for admin routes.
Fixes#74
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
