Rozsirenie analytiky: login event, prepinac vsetci/prihlaseni, plny nazov krajiny

Pageview beacony uz neposielaju player_id z klienta (nedovereny vstup na
neautentifikovanom endpointe) -- prihlasenie sa eviduje server-side ako
event "login" (aj z registracie), s player_id skutocneho uctu. Admin
dashboard dostal prepinac scope vsetci/prihlaseni, ktory konzistentne
pocita grafy aj tabulky (kazdy login samostatne, navstevnicky den pre
anonymnu navstevnost). PageView.country teraz uklada cely anglicky nazov
krajiny namiesto ISO kodu (potrebna zmena schemy). Pridane sledovanie
klikov na "Pravidla hry" aj z GameList.

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

frontend/src/App.tsx

@@ -2,6 +2,7 @@ import { lazy, Suspense, useEffect } from 'react';
 import { BrowserRouter, Routes, Route, Navigate, useNavigate, useLocation, useNavigationType } from 'react-router-dom';
 import { useGameStore } from './store/gameStore';
 import { socket, emit } from './lib/socket';
+import { trackEvent } from './lib/track';
 import type { MyPlayer } from './types';
 import GameList from './pages/GameList';
 import Lobby from './pages/Lobby';
@@ -73,15 +74,19 @@ function AppInner() {
   // stats), not a page the user actually navigated to, so they'd otherwise
   // inflate the count with one extra row per redirect hop. Skip /admin itself
   // 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).
   useEffect(() => {
     if (navigationType === 'REPLACE') return;
     if (location.pathname.startsWith('/admin')) return;
-    fetch('/api/track', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ path: location.pathname, referrer: document.referrer }),
-      keepalive: true,
-    }).catch(() => {});
+    if (
+      location.pathname === '/' ||
+      location.pathname.startsWith('/lobby') ||
+      location.pathname.startsWith('/game')
+    ) {
+      return;
+    }
+    trackEvent(location.pathname, document.referrer);
   }, [location.pathname, navigationType]);
 
   return (