Fix voice gender using server data and update loading screen UI

- Use authoritative playerRace/playerGender at spawn for voice profiles
  instead of unreliable model name parsing
- Support nonbinary gender with useFemaleModel body type fallback
- Move voice setup into spawnPlayerCharacter() for all spawn paths
- Remove legacy single-player default Human Male clip preloading
- Make loading screen text black and move progress bar to top

src/rendering/renderer.cpp

@@ -2452,12 +2452,6 @@ void Renderer::update(float deltaTime) {
         }
 
         characterRenderer->setInstancePosition(characterInstanceId, characterPosition);
-        if (activitySoundManager) {
-            std::string modelName;
-            if (characterRenderer->getInstanceModelName(characterInstanceId, modelName)) {
-                activitySoundManager->setCharacterVoiceProfile(modelName);
-            }
-        }
 
         // Movement-facing comes from camera controller and is decoupled from LMB orbit.
         // During taxi flights, orientation is controlled by the flight path (not player input)