Improve summit terrain, mobile HUD and multiplayer night equipment

Add the Blender flashlight asset with a 600 lm beam and reduced bloom, shared-mode self badge, and compact phone controls. Relocate the summit marker, blend terrain seams, widen walking routes, and align local server configuration on port 2027.

src/scene/summitTrails.ts

@@ -43,6 +43,8 @@ export function createSummitTrails(geometry: BufferGeometry, onTextureLoaded: ()
         }\n`+shader.fragmentShader;
         for(const [chunk,map,uv] of [['map_fragment','map','vMapUv'],['normal_fragment_maps','normalMap','vNormalMapUv'],['roughnessmap_fragment','roughnessMap','vRoughnessMapUv']] as const)
           shader.fragmentShader=shader.fragmentShader.replace(`#include <${chunk}>`,ShaderChunk[chunk].replaceAll(`texture2D( ${map}, ${uv} )`,`rockDetail(${map},${uv})`));
+        shader.fragmentShader=shader.fragmentShader.replace('#include <metalnessmap_fragment>',
+          `roughnessFactor=max(roughnessFactor,${SUMMIT_MATERIALS.minimumRoughness});\n#include <metalnessmap_fragment>`);
       };
       rockMaterial.customProgramCacheKey=()=>`route-rock-detail-${detail.secondaryScale}-${secondaryBlend}`;
       // Keep leaf detail near the observer; avoid obvious repeated bands across distant slopes.
@@ -114,7 +116,8 @@ export function createSummitTrails(geometry: BufferGeometry, onTextureLoaded: ()
         shader.fragmentShader=shader.fragmentShader.replace('#include <normal_fragment_maps>',
           ShaderChunk.normal_fragment_maps.replaceAll('texture2D( normalMap, vNormalMapUv )','summitSample(normalMap,trailNormal,rockNormal,vNormalMapUv,1)'));
         shader.fragmentShader=shader.fragmentShader.replace('#include <roughnessmap_fragment>',
-          ShaderChunk.roughnessmap_fragment.replace('texture2D( roughnessMap, vRoughnessMapUv )','summitSample(roughnessMap,trailRoughness,rockRoughness,vRoughnessMapUv,2)'));
+          ShaderChunk.roughnessmap_fragment.replace('texture2D( roughnessMap, vRoughnessMapUv )','summitSample(roughnessMap,trailRoughness,rockRoughness,vRoughnessMapUv,2)')
+          + `\nroughnessFactor=max(roughnessFactor,${SUMMIT_MATERIALS.minimumRoughness});`);
       };
     }
     const mesh=new Mesh(geometry,material);mesh.name=`Summit ${name} PBR surface`;group.add(mesh);