feat: relative time labels in session sidebar (#406)

* feat: add relative time to session sidebar

(cherry picked from commit 272be9787fdff75d3da2dbc73175820477a3390e)

* fix: address session sidebar relative-time review feedback

* docs: v0.50.27 release — version badge and CHANGELOG

---------

Co-authored-by: Jordan SkyLF <jordan@skylinkfiber.net>
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>

static/index.html

@@ -535,7 +535,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.26</span>
+              <span class="settings-version-badge">v0.50.27</span>
             </div>
             <div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
               <label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>