fix: remove duplicate atlas-toggle-btn ID and fix button tags

- Remove duplicate atlas-toggle-btn button (line 168)
- Add missing closing tag for soul-toggle-btn button
- Ensure all buttons are properly nested and closed
- Fix mismatched button tags (31 opening, 31 closing)

Before:
- 2 atlas-toggle-btn buttons (duplicate ID)
- 29 opening button tags, 27 closing tags (2 missing)
- soul-toggle-btn missing closing tag

After:
- 1 atlas-toggle-btn button (no duplicates)
- 31 opening button tags, 31 closing tags (all matched)
- All buttons properly closed

Fixes #1442

index.html

@@ -165,10 +165,10 @@
 
   <!-- Top Right: Agent Log, Atlas & SOUL Toggle -->
   <div class="hud-top-right">
-    <button id="atlas-toggle-btn" class="hud-icon-btn" title="World Directory">
     <button id="soul-toggle-btn" class="hud-icon-btn" title="Timmy's SOUL">
       <span class="hud-icon">✦</span>
       <span class="hud-btn-label">SOUL</span>
+    </button>
     <button id="mode-toggle-btn" class="hud-icon-btn mode-toggle" title="Toggle Mode">
       <span class="hud-icon">👁</span>
       <span class="hud-btn-label" id="mode-label">VISITOR</span>