Analytika: landing event zachytava prvu navstevu aj s referrerom

Navsteva zacinajuca na / (preklik z FB/Messengeru, natukanie domeny)
doteraz nezanechala v page_views ziadny zaznam: / je v skip liste
beaconu a gate redirect na /auth je REPLACE navigacia, takze sa skipli
oba hopy a referrer sa stratil. trackLanding() v main.tsx posle raz za
kazdy plny load stranky pomenovany event landing s document.referrer.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/App.tsx

@@ -76,6 +76,8 @@ function AppInner() {
   // too -- that's the dashboard viewing its own traffic, not player usage.
   // Skip /, /lobby, /game -- high-frequency in-game navigation with no
   // analytical value; the backend drops these anyway (api/stats.py _SKIPPED_PATHS).
+  // The visitor's first touch (incl. landings on "/", which both skips would
+  // otherwise swallow) is captured by trackLanding() in main.tsx instead.
   useEffect(() => {
     if (navigationType === 'REPLACE') return;
     if (location.pathname.startsWith('/admin')) return;