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.

scripts/locate-summit-marker.py

@@ -0,0 +1,18 @@
+"""Apply the satellite-estimated marker location in the authored plateau scene."""
+import bpy, json
+from pathlib import Path
+
+ROOT = Path('D:/project/sunrise')
+spec = json.loads((ROOT/'scripts/constants/marker-location.json').read_text())
+root = bpy.data.objects['summit-marker']
+baseline = bpy.data.meshes['Slab before marker seating']
+x, south = spec['offsetFromStartMeters']
+def ground(x, y):
+    return min(baseline.vertices, key=lambda v:(v.co.x-x)**2+(v.co.y-y)**2).co.z
+root.location.z += ground(x, -south)-ground(root.location.x, root.location.y)
+root.location.x, root.location.y = x, -south
+root['locationSource'] = spec['source']
+root['locationUncertaintyMeters'] = spec['estimatedUncertaintyMeters']
+# Restore the original ground, then seat the existing stone at its new location.
+exec(compile((ROOT/'scripts/sculpt-asymmetric-marker.py').read_text(), 'sculpt-asymmetric-marker.py', 'exec'))
+exec(compile((ROOT/'scripts/export-summit-plateau.py').read_text(), 'export-summit-plateau.py', 'exec'))