Remove finale page from book interior

The cover PDF serves this purpose. Removes the page--finale template
block, the finale data loading path in build.js, and all finale CSS.
Page count: 100 → 99 (imprint + title + TOC + 96 scene pages).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/book.html

@@ -43,22 +43,6 @@
     {% include "story-spread.html" %}
   {% endfor %}
 
-  {# ── Finale page ── #}
-  <div class="page page--finale">
-    {% if finale.image %}
-      <img class="finale-image" src="{{ finale.image }}" alt="Das Kaleidoskop – alle zwölf Welten">
-    {% else %}
-      <div class="placeholder-image" style="background: #0d0d2b; width:100%; height:100%;">
-        <div class="placeholder-label">
-          <span class="placeholder-scene">Finale-Illustration (alle 12 Welten)</span>
-        </div>
-      </div>
-    {% endif %}
-    <div class="finale-overlay">
-      <h2>Das Kaleidoskop</h2>
-      <p>Alle zwölf Welten auf einen Blick</p>
-    </div>
-  </div>
 
 </body>
 </html>