Make grass block vision

src/rendering/FovManager.ts

@@ -1,6 +1,7 @@
 import { FOV } from "rot-js";
 import { type World, type EntityId } from "../core/types";
-import { idx, inBounds, isWall } from "../engine/world/world-logic";
+import { idx, inBounds } from "../engine/world/world-logic";
+import { blocksSight } from "../core/terrain";
 import { GAME_CONFIG } from "../core/config/GameConfig";
 import Phaser from "phaser";
 
@@ -21,7 +22,8 @@ export class FovManager {
 
     this.fov = new FOV.PreciseShadowcasting((x: number, y: number) => {
       if (!inBounds(world, x, y)) return false;
-      return !isWall(world, x, y);
+      const idx = y * world.width + x;
+      return !blocksSight(world.tiles[idx]);
     });
   }