Fixed breadcrumb 'Books' navigation - goes to version home instead of root

- **Corrected breadcrumb targets**: 'Books' button now navigates to /version/{current-version} instead of root '/'
- **Version-aware navigation**: All breadcrumb 'Books' clicks stay within current Bible version
- **Proper page flow**: Click 'Books' from any page → goes back to current version's book selection
- **Complete navigation loop**: ESV → Genesis → Chapter 1 → Books → back to ESV book selection

Breadcrumb navigation now intelligently stays within current Bible version context!

frontend/src/components/ChapterSelector.tsx

@@ -147,7 +147,7 @@ const ChapterSelector: React.FC<ChapterSelectorProps> = ({ book, onChapterSelect
       {/* Breadcrumb Navigation */}
       <div className="flex items-center justify-center space-x-1 mb-8">
         <button
-          onClick={() => window.location.href = '/'}
+          onClick={() => window.location.href = `/version/${version}`}
           className="flex items-center space-x-1 text-sm text-gray-600 dark:text-gray-400 hover:text-blue-600 dark:hover:text-blue-400 transition-colors"
         >
           <ArrowLeft className="h-4 w-4" />