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.

index.html

@@ -31,6 +31,7 @@
       <symbol id="icon-umbrella" viewBox="0 0 24 24"><path d="M2 12a10 10 0 0 1 20 0H2Zm10 0v7a2 2 0 0 0 4 0M12 2V1"/></symbol>
       <symbol id="icon-raincoat" viewBox="0 0 24 24"><path d="m8 3 4 3 4-3 5 5-3 4-2-2v11H8V10l-2 2-3-4 5-5ZM12 6v15M9 16h1M14 16h1"/></symbol>
       <symbol id="icon-hood" viewBox="0 0 24 24"><path d="M4 15V10a8 8 0 0 1 16 0v5l-3 6H7l-3-6Z"/><path d="M8 15V10a4 4 0 0 1 8 0v5l-4 3-4-3ZM10 18v4M14 18v4"/></symbol>
+      <symbol id="icon-flashlight" viewBox="0 0 24 24"><path d="M8 10h8l-1 11H9L8 10ZM6 5h12v5H6V5ZM9 14h6M8 1l-1 2M12 0v3M16 1l1 2"/></symbol>
     </svg>
     <canvas id="world" aria-label="태양 관측 3D 풍경"></canvas>
     <main class="hud" aria-label="관측 조작">
@@ -64,6 +65,7 @@
         </section>
       </aside>
       <div id="solo-time-controls" aria-label="관측 시간">
+          <button id="time-toggle" type="button" aria-expanded="false" aria-controls="time-settings" aria-label="관측 시간 설정"><svg class="icon" aria-hidden="true"><use href="#icon-clock"/></svg><span id="compact-time" aria-hidden="true">00:00</span><span class="time-toggle-label">설정</span></button>
           <div id="time-settings">
           <div class="date-row"><span id="mode" class="mode">LIVE</span><time id="selected-time"></time><span class="unit">KST</span></div>
           <fieldset id="time-controls" class="time-panel" aria-label="관측 시각 조절" disabled>
@@ -82,7 +84,8 @@
         <div class="equipment-menu">
           <button type="button" id="equipment-toggle" aria-expanded="false" aria-controls="equipment-options"><svg class="icon" aria-hidden="true"><use href="#icon-umbrella"/></svg>장비</button>
           <div id="equipment-options" hidden>
-            <div class="equipment-controls" role="group" aria-label="우천 장비">
+            <div class="equipment-controls" role="group" aria-label="장비">
+              <button type="button" id="gear-flashlight" disabled aria-pressed="false" aria-label="손전등 켜기" title="손전등 · 단축키 6"><svg class="icon" aria-hidden="true"><use href="#icon-flashlight"/></svg><span id="flashlight-lumens"></span></button>
               <button type="button" id="gear-umbrella" disabled aria-pressed="false" aria-label="우산 쓰기" title="우산 쓰기 · 단축키 3" aria-describedby="gear-status"><svg class="icon" aria-hidden="true"><use href="#icon-umbrella"/></svg></button>
               <button type="button" id="gear-raincoat" disabled aria-pressed="false" aria-label="우비 입기" title="우비 입기 · 단축키 4" aria-describedby="gear-status"><svg class="icon" aria-hidden="true"><use href="#icon-raincoat"/></svg></button>
               <button type="button" id="gear-hood" disabled aria-pressed="false" aria-label="모자 쓰기" title="모자 쓰기 · 단축키 5" aria-describedby="gear-status"><svg class="icon" aria-hidden="true"><use href="#icon-hood"/></svg></button>