Fix Scripture Index page width; v2.0.35

.scripture-index-main had no max-width — page stretched full viewport width.
Set to 900px with auto margins to match the site standard.

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.0.34",
+  "version": "2.0.35",
   "type": "module",
   "scripts": {
     "dev": "vite",