Merge APP_V2/main: Combine quality updates with league features

- Merged remote changes: Liga krog3 and league state management
- Resolved merge conflicts in locale files and templates
- Kept local v1.0.1 version and styling improvements
- Added league combine functionality from remote
- Preserved new league_state.json and tournament_results.json
- Integrated i18n improvements

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

templates/index.html

@@ -693,6 +693,7 @@
       <div class="settings-group">
         <h4 data-i18n="league.tournaments">Turnirji</h4>
         <a href="/tournament" class="nav-link" id="tournamentModeLink">🏆 <span data-i18n="tournament.tournament_mode">Način Turnirja</span></a>
+        <a href="/league/combine" class="nav-link">🔗 <span data-i18n="league.combine_leagues">Combine Leagues</span></a>
         <a href="/archive/player-analysis" class="nav-link">👤 <span data-i18n="players.player_analysis">Analiza Igralcev</span></a>
         <a href="/archive" class="nav-link">📚 <span data-i18n="navigation.archive">Arhiv</span></a>
       </div>