Add [ and ] navigation to verse pages

- [ goes to previous verse
- ] goes to next verse
- Update accessibility page to document verse page shortcuts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

kjvstudy_org/templates/accessibility.html

@@ -183,13 +183,21 @@
             </thead>
             <tbody>
                 <tr>
-                    <td><kbd>←</kbd></td>
+                    <td><kbd>[</kbd></td>
                     <td>Previous verse</td>
                 </tr>
                 <tr>
-                    <td><kbd>→</kbd></td>
+                    <td><kbd>]</kbd></td>
                     <td>Next verse</td>
                 </tr>
+                <tr>
+                    <td><kbd>←</kbd></td>
+                    <td>Go back</td>
+                </tr>
+                <tr>
+                    <td><kbd>→</kbd></td>
+                    <td>Next verse (alternative)</td>
+                </tr>
                 <tr>
                     <td><kbd>Space</kbd></td>
                     <td>Read selected text aloud (press again to stop)</td>

kjvstudy_org/templates/verse.html

@@ -1220,6 +1220,18 @@
             {% if verse_num < total_verses %}
             window.location.href = '/book/{{ book }}/chapter/{{ chapter }}/verse/{{ verse_num + 1 }}';
             {% endif %}
+        } else if (e.key === '[') {
+            // Previous verse
+            e.preventDefault();
+            {% if verse_num > 1 %}
+            window.location.href = '/book/{{ book }}/chapter/{{ chapter }}/verse/{{ verse_num - 1 }}';
+            {% endif %}
+        } else if (e.key === ']') {
+            // Next verse
+            e.preventDefault();
+            {% if verse_num < total_verses %}
+            window.location.href = '/book/{{ book }}/chapter/{{ chapter }}/verse/{{ verse_num + 1 }}';
+            {% endif %}
         }
     });
 })();