Name the chrome's language menu and guard anchor positioning in the fallback

views/partials/shell.ejs

@@ -60,7 +60,7 @@
             <%# Signed in: the same popover block as the menu partial, hand-rolled because this one's
                 trigger composes escaped user values and its item is a CSRF POST form, neither of which
                 the partial's Item shapes cover (AGENTS.md). Keep the two in step. %>
-            <span class="menu" style="flex:1 1 auto">
+            <div class="menu" style="flex:1 1 auto">
               <button class="profile" type="button" popovertarget="profile-menu">
                 <span class="avatar" aria-hidden="true"><%= user.initials %></span>
                 <span class="profile-meta">
@@ -76,7 +76,7 @@
                   <button class="menu-item danger" type="submit"><svg class="ico"><use href="#i-logout" /></svg><%= t("shell.signOut") %></button>
                 </form>
               </div>
-            </span>
+            </div>
             <% } else if (!hideSignIn) { %>
             <%# anonymous (a public page in the shell): no session to end — offer a way in instead.
                 signInHref carries this page as return_to (chrome.signInHref); falls back to bare /login.
@@ -84,7 +84,7 @@
             <a class="btn btn-primary" href="<%= locals.signInHref || '/login' %>" style="flex:1 1 auto"><svg class="ico ico-sm" aria-hidden="true"><use href="#i-user" /></svg><%= t("shell.signIn") %></a>
             <% } %>
 
-            <%- include("locale-switch") %>
+            <%- include("locale-switch", { localeMenuId: "chrome-locale-menu" }) %>
           </div>
         </div>
       </aside>