Savegames hold only the game state: no settings, no camera (settings stay in local storage)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/scenes.rs

@@ -55,7 +55,7 @@ fn save(name: &str, g: &mut Game, x: f32, z: f32, zoom: f32, yaw: f32, fog: bool
     let mut s = Settings::default();
     s.language = "en".into();
     s.hints = false;
-    std::fs::write(format!("/tmp/scenes/{}.json", name), crate::save::to_json(g, &cam, &s)).unwrap();
+    std::fs::write(format!("/tmp/scenes/{}.json", name), crate::save::to_json_with_camera(g, &cam)).unwrap();
 }
 
 fn run(g: &mut Game, secs: f32) {