fix: Place formula field configuration after description in editor

- Move formula field configuration section after description field
- Maintain consistency with integer and date fields ordering
- Follow standard pattern: name, description, specific parameters

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: maatinito

app/components/types_de_champ_editor/champ_component/champ_component.html.haml

@@ -53,6 +53,11 @@
                   = t('.expression_reguliere.labels.error_message')
                 = form.text_field :expression_reguliere_error_message, class: "fr-input small-margin small", id: dom_id(type_de_champ, :expression_reguliere_error_message)
 
+            - if !type_de_champ.header_section? && !type_de_champ.titre_identite?
+              .cell.fr-mt-1w
+                = form.label :description, "Description du champ (optionnel)", for: dom_id(type_de_champ, :description)
+                = form.text_area :description, class: 'fr-input small-margin small width-100 resize-y', rows: 3, id: dom_id(type_de_champ, :description)
+
             - if type_de_champ.formule?
               - available_champs = upper_coordinates.filter_map { |coord| { label: coord.type_de_champ.libelle, stable_id: coord.type_de_champ.stable_id } if coord.type_de_champ.fillable? }
               .cell.fr-mt-1w{ data: { controller: 'formula-editor', formula_editor_champs_value: available_champs.to_json } }
@@ -76,11 +81,6 @@
                 - if type_de_champ.errors[:formule_expression].any?
                   %p.fr-message.fr-message--error
                     = type_de_champ.errors[:formule_expression].join(", ")
-
-            - if !type_de_champ.header_section? && !type_de_champ.titre_identite?
-              .cell.fr-mt-1w
-                = form.label :description, "Description du champ (optionnel)", for: dom_id(type_de_champ, :description)
-                = form.text_area :description, class: 'fr-input small-margin small width-100 resize-y', rows: 3, id: dom_id(type_de_champ, :description)
             - if type_de_champ.header_section?
               .cell.fr-mt-1w
                 = render TypesDeChampEditor::HeaderSectionComponent.new(form: form, tdc: type_de_champ, upper_tdcs: filtered_upper_tdcs)