Compile the PWA help and account settings through Herb

Rails main compiles HTML templates through Herb under the 8.2 framework
defaults, which Campfire loads. Herb rejects `case` and its first `when`
in a single ERB tag, so the three pwa/ partials failed to compile, and
`herb:check` rejects ERB output in attribute names, which the account
settings' switch used for `checked`. Give `case` its own tag and build
the switch with tag.input; both render the same under Erubi.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
(cherry picked from commit 244e77241b)

app/views/accounts/edit.html.erb

@@ -76,10 +76,9 @@
         <% end %>
 
         <label class="switch">
-          <input type="checkbox"
-                class="switch__input"
-                <%= "checked" if Current.account.settings.restrict_room_creation_to_administrators? %>
-                data-action="change->form#submit">
+          <%= tag.input type: "checkbox", class: "switch__input",
+                checked: Current.account.settings.restrict_room_creation_to_administrators?,
+                data: { action: "change->form#submit" } %>
           <span class="switch__btn round"></span>
           <span class="for-screen-reader">
             Must be admin to create new rooms

app/views/pwa/_browser_settings.html.erb

@@ -6,8 +6,8 @@
       <%= image_tag "disclosure.svg", aria: { hidden: "true" }, size: 10, class: "disclosure" %>
     </summary>
 
-    <% case
-      when platform.firefox? && platform.android? %>
+    <% case %>
+      <% when platform.firefox? && platform.android? %>
         <ol>
           <li>Tap <em><%= image_tag "lock.svg", alt: "the View site information button", size: 20 %></em> in the address bar.</li>
           <li>Tap <em>Notification</em> to change to <em>Allowed</em>.</li>

app/views/pwa/_install_instructions.html.erb

@@ -6,8 +6,8 @@
       <%= image_tag "disclosure.svg", aria: { hidden: "true" }, size: 10, class: "disclosure" %>
     </summary>
 
-    <% case
-      when platform.edge? %>
+    <% case %>
+      <% when platform.edge? %>
         <ol>
           <li>Click <em><%= image_tag "external/install-edge.svg", alt: "the app available - install Campfire chat button", size: 16 %></em>in the address bar.</li>
           <li>Click <em>Install</em>.</li>

app/views/pwa/_system_settings.html.erb

@@ -5,8 +5,8 @@
     <%= image_tag "disclosure.svg", aria: { hidden: "true" }, size: 10, class: "disclosure" %>
   </summary>
 
-  <% case
-    when platform.firefox? && platform.android? %>
+  <% case %>
+    <% when platform.firefox? && platform.android? %>
       <ol>
         <li>Tap the <em><%= image_tag "menu-dots-vertical.svg", alt: "More options", size: 16 %></em> menu button.</li>
         <li>Tap <em>Settings</em>.</li>