feat(sub12a): recipe form — buttons + is_template + Step Authoring tab

Process node form:
- Header: keep 'Open Tree Editor' (primary, existing); add 'Open Simple
  Editor' (secondary). Both visible only for recipe-type nodes.
- Recipe Settings group: add preferred_editor + is_template (the latter
  supervisor-only).
- New 'Step Authoring' notebook page (visible for step/operation):
  Stations, default_kind, material_callout, predecessor/rack/transition
  flags, time/temp targets, voltage/viscosity, readonly
  source_template_id.

Model:
- New action_open_simple_editor (sibling of action_open_tree_editor).
- New _resolve_preferred_editor() — per-recipe preferred_editor wins,
  'auto' falls back to company.x_fc_default_recipe_editor, final
  fallback 'tree'.
- New action_open_recipe_with_preferred_editor() — one-click route
  through the resolver. Reserved for menu-list / context-menu callers
  that want the simple-loving foreman path.

Tree editor + every existing battle test path untouched.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating/models/fp_process_node.py

@@ -544,6 +544,41 @@ class FpProcessNode(models.Model):
             'context': {'recipe_id': root.id},
         }
 
+    def action_open_simple_editor(self):
+        """Open the OWL Simple Recipe Editor for this recipe (Sub 12a)."""
+        self.ensure_one()
+        root = self if self.node_type == 'recipe' else self.recipe_root_id
+        return {
+            'type': 'ir.actions.client',
+            'tag': 'fp_simple_recipe_editor',
+            'name': f'Recipe — {root.name}',
+            'context': {'recipe_id': root.id},
+        }
+
+    def _resolve_preferred_editor(self):
+        """Returns 'tree' or 'simple' for this recipe.
+
+        Per-recipe preferred_editor wins. 'auto' falls back to the
+        company-level default. 'tree' is the final fallback.
+        """
+        self.ensure_one()
+        if self.preferred_editor in ('tree', 'simple'):
+            return self.preferred_editor
+        return self.env.company.x_fc_default_recipe_editor or 'tree'
+
+    def action_open_recipe_with_preferred_editor(self):
+        """Routes to whichever editor the recipe (or company) prefers.
+
+        Used by menu actions / context-menu opens — gives the
+        simple-loving foreman a one-click path that respects their
+        preference without forcing a tree-loving engineer to pick
+        between two buttons every time.
+        """
+        self.ensure_one()
+        if self._resolve_preferred_editor() == 'simple':
+            return self.action_open_simple_editor()
+        return self.action_open_tree_editor()
+
     # ---- Copy (deep-duplicate) -----------------------------------------------
 
     def copy(self, default=None):

fusion_plating/fusion_plating/views/fp_process_node_views.xml

@@ -40,6 +40,10 @@
                             string="Open Tree Editor" class="btn-primary"
                             icon="fa-sitemap"
                             invisible="node_type != 'recipe'"/>
+                    <button name="action_open_simple_editor" type="object"
+                            string="Open Simple Editor" class="btn-secondary"
+                            icon="fa-list-ol"
+                            invisible="node_type != 'recipe'"/>
                 </header>
                 <sheet>
                     <div class="oe_button_box" name="button_box">
@@ -90,11 +94,14 @@
                                    widget="float_time"/>
                             <field name="product_id"
                                    options="{'no_create': True}"/>
+                            <field name="preferred_editor"/>
                         </group>
                         <group>
                             <field name="contract_review_user_ids"
                                    widget="many2many_tags"
                                    options="{'no_create': True}"/>
+                            <field name="is_template"
+                                   groups="fusion_plating.group_fusion_plating_supervisor"/>
                         </group>
                     </group>
                     <group>
@@ -135,6 +142,38 @@
                                 </list>
                             </field>
                         </page>
+                        <page string="Step Authoring" name="step_authoring"
+                              invisible="node_type not in ('step', 'operation')">
+                            <group>
+                                <group string="Stations">
+                                    <field name="tank_ids" widget="many2many_tags"/>
+                                    <field name="default_kind"/>
+                                    <field name="material_callout"/>
+                                </group>
+                                <group string="Flags">
+                                    <field name="requires_predecessor_done"/>
+                                    <field name="requires_rack_assignment"/>
+                                    <field name="requires_transition_form"/>
+                                </group>
+                            </group>
+                            <group>
+                                <group string="Time Target">
+                                    <field name="time_min_target"/>
+                                    <field name="time_max_target"/>
+                                    <field name="time_unit"/>
+                                </group>
+                                <group string="Temperature Target">
+                                    <field name="temp_min_target"/>
+                                    <field name="temp_max_target"/>
+                                    <field name="temp_unit"/>
+                                </group>
+                            </group>
+                            <group>
+                                <field name="voltage_target"/>
+                                <field name="viscosity_target"/>
+                                <field name="source_template_id" readonly="1"/>
+                            </group>
+                        </page>
                         <page string="Notes" name="notes">
                             <field name="notes" placeholder="Internal notes..."/>
                         </page>