Reduce initial load to radius 1 (~5 tiles) for fast game entry

Was waiting for all ~50 tiles (radius 4) to fully prepare + finalize
before entering the game. Now loads only the immediate surrounding tiles
during the loading screen, then restores the full radius for in-game
streaming. setLoadRadius just sets an int — actual loading happens lazily
via background workers during the game loop.

src/core/application.cpp

@@ -3925,6 +3925,13 @@ void Application::loadOnlineWorldTerrain(uint32_t mapId, float x, float y, float
             auto* terrainMgr = renderer->getTerrainManager();
             auto* camera = renderer->getCamera();
 
+            // Use a small radius for the initial load (just immediate tiles),
+            // then restore the full radius after entering the game.
+            // This matches WoW's behavior: load quickly, stream the rest in-game.
+            const int savedLoadRadius = 4;
+            terrainMgr->setLoadRadius(1);
+            terrainMgr->setUnloadRadius(7);
+
             // Trigger tile streaming for surrounding area
             terrainMgr->update(*camera, 1.0f);
 
@@ -4016,6 +4023,9 @@ void Application::loadOnlineWorldTerrain(uint32_t mapId, float x, float y, float
 
             LOG_INFO("Online terrain streaming complete: ", terrainMgr->getLoadedTileCount(), " tiles loaded");
 
+            // Restore full load radius — remaining tiles stream in-game
+            terrainMgr->setLoadRadius(savedLoadRadius);
+
             // Load/precompute collision cache
             if (renderer->getWMORenderer()) {
                 showProgress("Building collision cache...", 0.88f);