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

include/audio/activity_sound_manager.hpp

@@ -27,6 +27,7 @@ public:
     void playLanding(FootstepSurface surface, bool hardLanding);
     void setSwimmingState(bool swimming, bool moving);
     void setCharacterVoiceProfile(const std::string& modelName);
+    void setCharacterVoiceProfile(const std::string& raceFolder, const std::string& raceBase, bool male);
     void playWaterEnter();
     void playWaterExit();
     void playMeleeSwing();