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.

public/osm-derived.json

@@ -10,7 +10,7 @@
       {
         "id": "way/337498789",
         "label": "정상 암반길",
-        "width": 3.2,
+        "width": 5.2,
         "points": [
           [
             126.9642427,
@@ -57,7 +57,7 @@
       {
         "id": "way/37751526",
         "label": "남쪽 하산 계단길",
-        "width": 2.4,
+        "width": 4.4,
         "points": [
           [
             126.9652191,
@@ -148,7 +148,7 @@
       {
         "id": "way/337498787",
         "label": "동쪽 계단길",
-        "width": 2.2,
+        "width": 4.2,
         "points": [
           [
             126.9646956,
@@ -167,7 +167,7 @@
       {
         "id": "way/337498788",
         "label": "북쪽 능선길",
-        "width": 2.4,
+        "width": 4.4,
         "points": [
           [
             126.9652188,