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>

tests/test_stats.py

@@ -159,6 +159,20 @@ class StatsCase(unittest.TestCase):
         data = run(stats.get_daily_stats())
         self.assertGreaterEqual(data["top_paths"].get("login", 0), 1)
 
+    def test_landing_event_preserves_referrer(self):
+        # "landing" event (main.tsx, jeden na kazdy plny load stranky) nesie
+        # referrer prveho dotyku -- jediny zaznam z navstevy, ktora zacina na
+        # "/" (preklik z FB a pod.), kedze "/" aj REPLACE redirecty sa skipuju.
+        run(stats.record_pageview(
+            path="landing",
+            referrer="https://facebook.com/",
+            user_agent=CHROME_UA,
+            ip="203.0.113.99",
+        ))
+        data = run(stats.get_daily_stats())
+        self.assertGreaterEqual(data["top_paths"].get("landing", 0), 1)
+        self.assertGreaterEqual(data["top_referrers"].get("https://facebook.com/", 0), 1)
+
     def test_rules_view_event_recorded_without_player_id(self):
         run(stats.record_pageview(path="rules_view", referrer="", user_agent=CHROME_UA))
         data = run(stats.get_daily_stats())