Statistics with a chart at the end of a game, 64 achievements kept locally and on the server

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

src/walls.rs

@@ -119,6 +119,7 @@ impl Game {
         tl.bed = 0;
         tl.food = 0.0;
         self.wall_plans.retain(|p| p.0 != w);
+        self.count(crate::stats::WALLS, 1.0);
         self.fx(8, wx as f32 + 0.5, wy as f32 + 0.5, 0.0, 0.0, 0.5, 0xff4040e0);
         self.sfx(Sfx::Reinforce, wx as f32 + 0.5, wy as f32 + 0.5);
         false