- Refactor dirt and stone generation to optimize visible depth and adjust randomization.

- Remove unused `StartWebSocketGateway` function from `websocket_gateway.go`.
- Add security checks to track player-room mapping, enforce valid input, and prevent ID spoofing in `gateway.go`.
- Refactor touch control logic to dynamically position joystick and buttons above gameplay floor.
- Introduce dynamic floor Y-coordinate calculation (`GetFloorYFromHeight`) for better scaling across different screen sizes.
- Adjust rendering logic to align assets, particles, and debug visuals with dynamic screen height transformations.
- Update canvas CSS to support fullscreen scaling without center alignment.

cmd/client/web/assets/assets.json

@@ -357,7 +357,7 @@
         "OffsetY": 12,
         "W": 55,
         "H": 113,
-        "Type": ""
+        "Type": "wall"
       }
     }
   }

cmd/client/web/style.css

@@ -1,7 +1,7 @@
 @font-face{font-display:swap;font-family:'Press Start 2P';font-style:normal;font-weight:400;src:url('../assets/fonts/press-start-2p-v16-latin-regular.woff2') format('woff2')}
 body,html{margin:0;padding:0;width:100%;height:100%;background-color:#1a1a1a;color:#fff;overflow:hidden;font-family:'Press Start 2P',cursive;font-size:14px}
 #game-container{position:relative;width:100%;height:100%;box-shadow:0 0 50px rgba(0,0,0,.8);border:4px solid #444;background:#000}
-canvas{position:fixed!important;top:50%!important;left:50%!important;transform:translate(-50%,-50%)!important;width:100%!important;height:100%!important;max-width:100vw!important;max-height:100vh!important;object-fit:contain!important;z-index:1!important;background:#000;image-rendering:pixelated;opacity:0;pointer-events:none;transition:opacity .3s;visibility:hidden}
+canvas{position:fixed!important;top:0!important;left:0!important;width:100vw!important;height:100vh!important;z-index:1!important;background:#000;image-rendering:pixelated;opacity:0;pointer-events:none;transition:opacity .3s;visibility:hidden}
 canvas.game-active{opacity:1;pointer-events:auto;z-index:2000!important;visibility:visible}
 .overlay-screen{position:fixed!important;top:0;left:0;width:100%;height:100%;background:url('background.jpg') center/cover no-repeat,rgba(0,0,0,.85);display:flex;justify-content:center;align-items:center;z-index:1000;box-sizing:border-box;padding:20px}
 .overlay-screen.hidden{display:none!important}