Replace spawn marker with box-based figure

packages/editor/src/components/ui/panels/spawn-panel.tsx

@@ -91,7 +91,7 @@ export function SpawnPanel() {
   const storedRotationDegrees = Math.round((node.rotation * 180) / Math.PI)
 
   return (
-    <PanelWrapper icon="/icons/spawn-point.svg" onClose={handleClose} title="Spawn Point" width={300}>
+    <PanelWrapper icon="/icons/site.png" onClose={handleClose} title="Spawn Point" width={300}>
       <PanelSection title="Position">
         <SliderControl
           label="X"

packages/editor/src/components/ui/sidebar/panels/site-panel/spawn-tree-node.tsx

@@ -54,7 +54,7 @@ export const SpawnTreeNode = memo(function SpawnTreeNode({
           alt=""
           className="object-contain"
           height={14}
-          src="/icons/spawn-point.svg"
+          src="/icons/site.png"
           width={14}
         />
       }

packages/viewer/src/components/renderers/spawn/spawn-renderer.tsx

@@ -54,13 +54,13 @@ export const SpawnRenderer = ({ node }: { node: SpawnNode }) => {
         <meshStandardMaterial {...materialProps} />
       </mesh>
 
-      <mesh position={[0, 0.36, 0]} {...handlers}>
+      <mesh position={[0, 0.41, 0]} {...handlers}>
-        <cylinderGeometry args={[0.08, 0.08, 0.54, 24]} />
+        <boxGeometry args={[0.3, 0.54, 0.16]} />
         <meshStandardMaterial {...materialProps} />
       </mesh>
 
-      <mesh position={[0, 0.68, 0]} {...handlers}>
+      <mesh position={[0, 0.83, 0]} {...handlers}>
-        <sphereGeometry args={[0.16, 24, 16]} />
+        <boxGeometry args={[0.18, 0.18, 0.18]} />
         <meshStandardMaterial {...materialProps} />
       </mesh>
     </group>