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>

styles/typography.css

@@ -188,22 +188,3 @@ body {
   margin-top: 0.5rem;
 }
 
-/* ── Finale overlay ── */
-.finale-overlay h2 {
-  font-family: var(--font-display);
-  font-style: italic;
-  font-weight: 300;
-  font-size: 2.6rem;
-  color: white;
-  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
-  letter-spacing: 0.02em;
-}
-
-.finale-overlay p {
-  font-family: var(--font-display);
-  font-style: italic;
-  font-size: 0.95rem;
-  color: rgba(255, 255, 255, 0.7);
-  letter-spacing: 0.12em;
-  margin-top: 0.6rem;
-}