fix(versions): show version numbers for latest and stable in brackets

Use brackets instead of parentheses and italic for version numbers.
latest shows stable+1, stable shows stable version number.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

Author: skjnldsv

admin_manual/_templates/versions.html

@@ -22,7 +22,7 @@
              style="color: var(--dark-link-color);"
              {% endif %}
           >
-            {{ slug if slug != 'stable' else 'stable (' ~ version_stable ~ ')' }}
+            {% if slug == 'stable' %}{{ version_stable }} (stable){% elif slug == 'latest' %}{{ version_stable|int + 1 }} (latest){% else %}{{ slug }}{% endif %}
           </a>
         </dd>
         {% endfor %}

developer_manual/_templates/versions.html

@@ -22,7 +22,7 @@
              style="color: var(--dark-link-color);"
              {% endif %}
           >
-            {{ slug if slug != 'stable' else 'stable (' ~ version_stable ~ ')' }}
+            {% if slug == 'stable' %}{{ version_stable }} (stable){% elif slug == 'latest' %}{{ version_stable|int + 1 }} (latest){% else %}{{ slug }}{% endif %}
           </a>
         </dd>
         {% endfor %}

user_manual/_templates/versions.html

@@ -97,7 +97,7 @@
                style="color: var(--dark-link-color);"
                {% endif %}
             >
-              {{ slug if slug != 'stable' else 'stable (' ~ version_stable ~ ')' }}
+              {% if slug == 'stable' %}{{ version_stable }} (stable){% elif slug == 'latest' %}{{ version_stable|int + 1 }} (latest){% else %}{{ slug }}{% endif %}
             </a>
           </dd>
         {% endfor %}