Tech: migrate all attachment usages to new components

Migrate all existing usages:
- MultipleComponent → FileFieldComponent with drop_zone: :integrated
- UniqueComponent → FileFieldComponent with drop_zone: :none

All functionality preserved, architecture simplified.
Affects 17 files across views and components.

Part of attachment components refactoring (#5/7)

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

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

Author: mfo

app/components/attachment/context.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 # Value object for attachment component configuration.
-# Eliminates parameter duplication (12→5 params for ButtonUploaderComponent).
+# Eliminates parameter duplication across attachment components.
 class Attachment::Context
   attr_reader :champ, :attached_file, :auto_attach_url, :direct_upload, :view_as,
               :user_can_destroy, :form_object_name, :aria_labelledby,

app/components/attachment/file_field_component.rb

@@ -30,14 +30,16 @@ class Attachment::FileFieldComponent < ApplicationComponent
 
   renders_one :template
 
-  attr_reader :context, :max, :drop_zone, :attachments, :current_count
+  attr_reader :context, :max, :drop_zone, :attachments, :current_count, :hidden, :input_id
 
   delegate :champ, :form_object_name, :view_as, :user_can_destroy?, :aria_labelledby, :attached_file,
            to: :context
 
-  def initialize(context:, drop_zone:, max: nil, attachments: nil)
+  def initialize(context:, drop_zone:, max: nil, attachments: nil, hidden: false, id: nil)
     @context = context
     @drop_zone = drop_zone
+    @hidden = hidden
+    @input_id = id
 
     # Get attachments
     @attachments = if attachments
@@ -95,7 +97,9 @@ def file_input_component
     Attachment::FileInputComponent.new(
       context:,
       max: @max,
-      current_count: @current_count
+      current_count: @current_count,
+      hidden: @hidden,
+      id: @input_id
     )
   end
 

app/components/editable_champ/piece_justificative_component.rb

@@ -17,7 +17,7 @@ def max
     if @champ.RIB? || @champ.titre_identite_nature?
       1
     elsif [true, nil].include?(@champ.procedure&.piece_justificative_multiple?)
-      Attachment::MultipleComponent::DEFAULT_MAX_ATTACHMENTS
+      Attachment::FileFieldComponent::DEFAULT_MAX_ATTACHMENTS
     else
       1
     end

app/components/editable_champ/piece_justificative_component/piece_justificative_component.html.haml

@@ -1,4 +1,4 @@
-= render Attachment::MultipleComponent.new(context: attachment_context, max:) do |c|
+= render Attachment::FileFieldComponent.new(context: attachment_context, max:, drop_zone: :integrated) do |c|
   - if @champ.type_de_champ.piece_justificative_template&.attached?
     - c.with_template do
       = render partial: "shared/piece_justificative_template", locals: { champ: @champ }

app/components/editable_champ/quotient_familial_component/quotient_familial_component.html.haml

@@ -48,4 +48,4 @@
         = t('.piece_justificative_champ.data_not_found')
   = t('.piece_justificative_champ.libelle')
   = render EditableChamp::AsteriskMandatoryComponent.new
-  = render Attachment::MultipleComponent.new(context: Attachment::Context.new(champ: @champ, form_object_name: @form.object_name, aria_labelledby: labelledby_id), max: 1)
+  = render Attachment::FileFieldComponent.new(context: Attachment::Context.new(champ: @champ, form_object_name: @form.object_name, aria_labelledby: labelledby_id), max: 1, drop_zone: :integrated)

app/components/editable_champ/titre_identite_component/titre_identite_component.html.haml

@@ -6,4 +6,4 @@
   = t('.allowed_formats', formats: allowed_formats.join(', '))
 
 - attachment = @champ.piece_justificative_file[0]
-= render Attachment::UniqueComponent.new(context: attachment_context, attachment:)
+= render Attachment::FileFieldComponent.new(context: attachment_context, attachments: attachment ? [attachment] : [], drop_zone: :integrated, max: 1)

app/components/referentiels/new_form_component/new_form_component.html.haml

@@ -31,7 +31,7 @@
           = form.label :piece_justificative_template, class: 'fr-label', for: dom_id(@type_de_champ, :piece_justificative_template) do
             Fichier CSV
             %span.fr-text-hint Utilisez le modèle du fichier CSV fourni ci-dessous pour construire votre référentiel (le nombre de colonne n'est pas limité).
-          = render Attachment::UniqueComponent.new(context: Attachment::Context.new(attached_file: @type_de_champ.piece_justificative_template, view_as: :link))
+          = render Attachment::FileFieldComponent.new(context: Attachment::Context.new(attached_file: @type_de_champ.piece_justificative_template, view_as: :link), drop_zone: :none)
 
       %hr.fr-hr.fr-my-5w
 

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

@@ -67,7 +67,7 @@
                     = form.text_area :collapsible_explanation_text, class: "fr-input small-margin small", id: dom_id(type_de_champ, :collapsible_explanation_text)
               .cell.fr-mt-1w
                 = form.label :notice_explicative, "Notice explicative", for: dom_id(type_de_champ, :notice_explicative)
-                = render Attachment::UniqueComponent.new(context: Attachment::Context.new(**notice_explicative_options))
+                = render Attachment::FileFieldComponent.new(context: Attachment::Context.new(**notice_explicative_options), drop_zone: :none)
 
             - if type_de_champ.piece_justificative?
               .cell.fr-mt-1w
@@ -145,7 +145,7 @@
               .cell
                 = form.label :piece_justificative_template, t('.template_label'), for: dom_id(type_de_champ, :piece_justificative_template)
                 %p.fr-hint-text= t('.max_file_size_hint', max_file_size: number_to_human_size(type_de_champ.max_file_size_bytes))
-                = render Attachment::UniqueComponent.new(context: Attachment::Context.new(**piece_justificative_template_options))
+                = render Attachment::FileFieldComponent.new(context: Attachment::Context.new(**piece_justificative_template_options), drop_zone: :none)
 
               - if type_de_champ.titre_identite?
                 .cell.fr-mt-1w

app/views/administrateurs/attestation_template_v2s/_form.html.haml

@@ -60,7 +60,7 @@
               Dimensions conseillées : au minimum 500px de largeur ou de hauteur.
 
             %div{ id: h(dom_id(attestation_template, :logo_attachment)) }
-              = render Attachment::UniqueComponent.new(context: Attachment::Context.new(attached_file: attestation_template.logo, direct_upload: false))
+              = render Attachment::FileFieldComponent.new(context: Attachment::Context.new(attached_file: attestation_template.logo, direct_upload: false), drop_zone: :none)
 
           .fr-fieldset__element
             = render Dsfr::InputComponent.new(form: f, attribute: :label_direction, input_type: :text_area, required: false, opts: { rows: 2, data: { controller: :textarea, textarea_max_rows_value: 2 } }) do |c|
@@ -103,7 +103,7 @@
               Dimensions conseillées : au minimum 500px de largeur ou de hauteur.
 
             %div{ id: h(dom_id(attestation_template, :signature_attachment)) }
-              = render Attachment::UniqueComponent.new(context: Attachment::Context.new(attached_file: attestation_template.signature, direct_upload: false))
+              = render Attachment::FileFieldComponent.new(context: Attachment::Context.new(attached_file: attestation_template.signature, direct_upload: false), drop_zone: :none)
 
           .fr-fieldset__element
             = render Dsfr::InputComponent.new(form: f, attribute: :footer, input_type: :text_area, required: false, opts: { rows: 3, data: { controller: :textarea, textarea_max_rows_value: 3 } }) do |c|

app/views/administrateurs/attestation_template_v2s/update.turbo_stream.haml

@@ -7,11 +7,11 @@
 
 - if @attestation_template.logo_blob&.previously_new_record?
   = turbo_stream.update dom_id(@attestation_template, :logo_attachment) do
-    = render(Attachment::UniqueComponent.new(context: Attachment::Context.new(attached_file: @attestation_template.logo, direct_upload: false)))
+    = render(Attachment::FileFieldComponent.new(context: Attachment::Context.new(attached_file: @attestation_template.logo, direct_upload: false), drop_zone: :none))
 
 - if @attestation_template.signature_blob&.previously_new_record?
   = turbo_stream.update dom_id(@attestation_template, :signature_attachment) do
-    = render(Attachment::UniqueComponent.new(context: Attachment::Context.new(attached_file: @attestation_template.signature, direct_upload: false)))
+    = render(Attachment::FileFieldComponent.new(context: Attachment::Context.new(attached_file: @attestation_template.signature, direct_upload: false), drop_zone: :none))
 
 - body_id = "attestation-template-json-body-messages"
 - if @attestation_template.errors.include?(:json_body)