Fix autofocus on dynamically inserted forms, remove this.blur() handlers

form_controller.connect() now blurs the previously focused element and
explicitly focuses the [autofocus] element when a form is inserted into
the DOM (via Turbo Stream). Only runs when an [autofocus] element is
present, so closing forms and other stream updates are unaffected.

Remove all onclick='this.blur()' inline handlers from templates — they
were a workaround for the same autofocus problem, now solved properly
via the Stimulus lifecycle.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/views/measurements/_readout.html.erb

@@ -4,7 +4,7 @@
   <td>
     <% if current_user.at_least(:active) %>
       <%= link_to readout.quantity, edit_measurement_path(readout),
-        class: 'link', onclick: 'this.blur();', data: {turbo_stream: true} %>
+        class: 'link', data: {turbo_stream: true} %>
     <% else %>
       <%= readout.quantity %>
     <% end %>

app/views/measurements/_wide_table.html.erb

@@ -20,7 +20,7 @@
                 <% if current_user.at_least(:active) %>
                   <%= link_to format("%.10g", readout.value),
                     edit_measurement_path(readout, view: :wide),
-                    class: 'link', onclick: 'this.blur();',
+                    class: 'link',
                     data: {turbo_stream: true} %>
                 <% else %>
                   <%= format("%.10g", readout.value) %>

app/views/measurements/index.html.erb

@@ -2,7 +2,7 @@
 <div class="rightside-area buttongrid" data-controller="measurements-view">
   <% if current_user.at_least(:active) %>
     <%= image_link_to t('.new_measurement'), 'plus-outline', new_measurement_path,
-      id: :new_measurement_link, onclick: 'this.blur();',
+      id: :new_measurement_link,
       data: {turbo_stream: true} %>
   <% end %>
   <%= image_button_tag '', 'view-rows', name: nil, type: 'button',