Add About/Tribute info page (words-only homage explanation)

public/index.html

@@ -26,6 +26,7 @@
         <button class="primary" id="btn-scan-set">Scan a Set</button>
         <button id="btn-freehunt">Free Hunt</button>
         <button id="btn-roster">Ghost Index</button>
+        <button id="btn-about">About This Tribute</button>
       </div>
 
       <div class="battery-hint mono">DETECTOR ONLINE · v0.1</div>
@@ -108,6 +109,45 @@
     </div>
   </section>
 
+  <!-- ============ ABOUT / TRIBUTE ============ -->
+  <section id="screen-about" class="screen hidden">
+    <button class="back" data-back>← Back</button>
+    <div class="about-wrap">
+      <h2>About This Tribute</h2>
+
+      <p class="about-lead">Newbury Nights is a fan-made, non-commercial homage to the
+      augmented-reality ghost-hunting mechanics of the LEGO® Hidden Side™ app, which the
+      LEGO Group discontinued. It exists because some of us loved how that game worked and
+      didn't want the idea to disappear.</p>
+
+      <h3>What this is</h3>
+      <p>An independent reimplementation of the <em>way the game played</em> — raising your
+      phone as a detector, uncovering coloured gloom, locking on, and clearing ghosts. The
+      ghost names, types, and stats are referenced from community documentation of the
+      original so the tribute feels true to what fans remember.</p>
+
+      <h3>What this is not</h3>
+      <p>This project is not made by, affiliated with, sponsored by, or endorsed by the
+      LEGO Group. It uses none of the LEGO Group's logos, brand artwork, minifigure designs,
+      or other protected imagery. Where the original game's name appears, it is only to
+      describe what this project pays tribute to.</p>
+
+      <h3>Names &amp; trademarks</h3>
+      <p>"LEGO" and "Hidden Side" are trademarks of the LEGO Group. They are referenced here
+      solely to identify the original work being honoured. If you're looking for the official
+      product, visit the LEGO Group's own website rather than this fan project.</p>
+
+      <h3>Credit &amp; takedown</h3>
+      <p>All credit for the original concept belongs to the LEGO Group and the team behind
+      Hidden Side. This is a labour of love, offered freely. If a rights holder would prefer
+      any element changed or removed, that request will be respected.</p>
+    </div>
+    <div class="disclaimer">
+      Fan-made tribute. Not affiliated with, sponsored by, or endorsed by the LEGO Group.
+      LEGO® and Hidden Side™ are trademarks of the LEGO Group.
+    </div>
+  </section>
+
   <!-- ============ ROSTER / INDEX ============ -->
   <section id="screen-roster" class="screen hidden">
     <button class="back" data-back>← Back</button>