Replace render_turbo_stream cancel handlers with form#cancel Stimulus action

Add cancel() method to form_controller that handles all close cases:
- tabular forms (<tr>): removes inner form, re-enables link, shows hidden row
- measurements create form: removes self, enables trigger link, shows no-items

Data attributes already present on controller elements (data-form, data-link,
data-hidden-row) drive the behaviour. Two extra attributes on the create form
(data-cancel-enable, data-cancel-show) cover the non-tabular case.

Delete now-unused _form_close and _edit_form_close partial templates.

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

app/javascript/controllers/form_controller.js

@@ -1,14 +1,6 @@
 import { Controller } from "@hotwired/stimulus"
 
 export default class extends Controller {
-  connect() {
-    const autofocusEl = this.element.querySelector('[autofocus]')
-    if (autofocusEl) {
-      document.activeElement?.blur()
-      autofocusEl.focus()
-    }
-  }
-
   processKey(event) {
     switch (event.key) {
       case "Escape":
@@ -30,4 +22,30 @@ export default class extends Controller {
       event.preventDefault()
     }
   }
+
+  cancel(event) {
+    event.preventDefault()
+    const el = this.element
+
+    // Move focus to next open form if this one had focus
+    const focused = document.activeElement
+    if (!focused || focused === document.body || el.contains(focused)) {
+      const next = el.parentElement?.querySelector(`#${el.id} ~ tr:has([autofocus])`)
+        ?? el.parentElement?.querySelector("tr:has([autofocus])")
+      next?.querySelector("[autofocus]")?.focus()
+    }
+
+    // Remove associated inner form element (tabular: <tr> wraps a separate <form>)
+    document.getElementById(el.dataset.form)?.remove()
+
+    // Re-enable trigger link
+    const enableId = el.dataset.link ?? el.dataset.cancelEnable
+    if (enableId) Turbo.StreamElement.prototype.enableElement(document.getElementById(enableId))
+
+    // Show hidden row (tabular forms) or no-items placeholder (create form)
+    document.getElementById(el.dataset.hiddenRow)?.removeAttribute("style")
+    document.getElementById(el.dataset.cancelShow)?.style.removeProperty("display")
+
+    el.remove()
+  }
 }

app/views/measurements/_edit_form.html.erb

@@ -19,7 +19,7 @@
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", measurements_path,
         class: 'dangerous', name: :cancel,
-        onclick: render_turbo_stream('edit_form_close', {row: row}) %>
+        data: {action: 'click->form#cancel'} %>
     </td>
   <% end %>
 <% end %>

app/views/measurements/_edit_form_close.html.erb

@@ -1,2 +0,0 @@
-<%= turbo_stream.close_form row %>
-<%= turbo_stream.update :flashes %>

app/views/measurements/_edit_panel.html.erb

@@ -26,7 +26,7 @@
           <%= form.button %>
           <%= image_link_to t(:cancel), "close-outline", measurements_path,
             class: 'dangerous', name: :cancel,
-            onclick: render_turbo_stream('edit_form_close', {row: row}) %>
+            data: {action: 'click->form#cancel'} %>
         </td>
       <% end %>
     </tbody>

app/views/measurements/_form.html.erb

@@ -1,6 +1,8 @@
 <%= tabular_form_with model: Measurement.new, id: :measurement_form,
   class: 'topside-area flex vertical center',
-  html: {data: {controller: 'form', action: 'keydown->form#processKey'}} do |form| %>
+  html: {data: {controller: 'form', action: 'keydown->form#processKey',
+                cancel_enable: 'new_measurement_link',
+                cancel_show: 'no_items'}} do |form| %>
 
   <table class="items-table center">
     <tbody id="readouts">
@@ -34,6 +36,6 @@
   <div class="flex reverse">
     <%= form.button id: :create_measurement_button, disabled: true -%>
     <%= image_link_to t(:cancel), "close-outline", measurements_path, name: :cancel,
-      class: 'dangerous', onclick: render_turbo_stream('form_close') %>
+      class: 'dangerous', data: {action: 'click->form#cancel'} %>
   </div>
 <% end %>

app/views/measurements/_form_close.html.erb

@@ -1,4 +0,0 @@
-<%= turbo_stream.update :flashes %>
-<%= turbo_stream.remove :measurement_form %>
-<%= turbo_stream.show :no_items -%>
-<%= turbo_stream.enable :new_measurement_link -%>

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', data: {turbo_stream: true} %>
+        class: 'link', onclick: 'this.blur();', 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',
+                    class: 'link', onclick: 'this.blur();',
                     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,
+      id: :new_measurement_link, onclick: 'this.blur();',
       data: {turbo_stream: true} %>
   <% end %>
   <%= image_button_tag '', 'view-rows', name: nil, type: 'button',

app/views/quantities/_form.html.erb

@@ -18,7 +18,7 @@
     <td class="flex">
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", quantities_path, class: 'dangerous',
-        name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>
+        name: :cancel, data: {action: 'click->form#cancel'} %>
     </td>
     <td></td>
   <% end %>

app/views/quantities/_form_close.html.erb

@@ -1,2 +0,0 @@
-<%= turbo_stream.close_form row %>
-<%= turbo_stream.update :flashes %>

app/views/quantities/_quantity.html.erb

@@ -8,7 +8,7 @@
 
   <td style="--depth:<%= quantity.depth %>">
     <%= link_to quantity, edit_quantity_path(quantity), class: 'link',
-      data: {turbo_stream: true} %>
+      onclick: 'this.blur();', data: {turbo_stream: true} %>
   </td>
   <td><%= quantity.description %></td>
   <td><%= quantity.default_unit&.symbol %></td>
@@ -16,7 +16,7 @@
   <% if current_user.at_least(:active) %>
     <td class="flex">
       <%= image_link_to t('.new_subquantity'), 'plus-outline', new_quantity_path(quantity),
-        id: dom_id(quantity, :new, :link), data: {turbo_stream: true} %>
+        id: dom_id(quantity, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>
 
       <%= image_button_to_if quantity.destroyable?, t('.destroy'), 'delete-outline',
         quantity_path(quantity), method: :delete %>

app/views/quantities/index.html.erb

@@ -1,7 +1,7 @@
 <div class="rightside-area buttongrid">
   <% if current_user.at_least(:active) %>
     <%= image_link_to t('.new_quantity'), 'plus-outline', new_quantity_path,
-      id: dom_id(Quantity, :new, :link),
+      id: dom_id(Quantity, :new, :link), onclick: 'this.blur();',
       data: {turbo_stream: true} %>
   <% end %>
   <%#= image_link_to t('.import_quantities'), 'download-outline', default_quantities_path,

app/views/units/_form.html.erb

@@ -16,7 +16,7 @@
     <td class="flex">
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", units_path, class: 'dangerous',
-        name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>
+        name: :cancel, data: {action: 'click->form#cancel'} %>
     </td>
     <td></td>
   <% end %>

app/views/units/_form_close.html.erb

@@ -1,2 +0,0 @@
-<%= turbo_stream.close_form row %>
-<%= turbo_stream.update :flashes %>

app/views/units/_unit.html.erb

@@ -7,7 +7,7 @@
                   drag_drop_id_param_value: 'unit[base_id]'} do %>
 
   <td style="--depth:<%= unit.base_id? ? 1 : 0 %>">
-    <%= link_to unit, edit_unit_path(unit), class: 'link',
+    <%= link_to unit, edit_unit_path(unit), class: 'link', onclick: 'this.blur();',
       data: {turbo_stream: true} %>
   </td>
   <td><%= unit.description %></td>
@@ -17,7 +17,7 @@
     <td class="flex">
       <% unless unit.base_id? %>
         <%= image_link_to t('.new_subunit'), 'plus-outline', new_unit_path(unit),
-          id: dom_id(unit, :new, :link), data: {turbo_stream: true} %>
+          id: dom_id(unit, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>
       <% end %>
 
       <%= image_button_to_if unit.movable?, t('.destroy'), 'delete-outline', unit_path(unit),

app/views/units/index.html.erb

@@ -1,7 +1,7 @@
 <div class="rightside-area buttongrid">
   <% if current_user.at_least(:active) %>
     <%= image_link_to t('.new_unit'), 'plus-outline', new_unit_path,
-      id: dom_id(Unit, :new, :link), data: {turbo_stream: true} %>
+      id: dom_id(Unit, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>
   <% end %>
   <%= image_link_to t('.import_units'), 'download-outline', default_units_path,
     class: 'tools-area' %>