chore(attachments): always render allowed formats when list is short

Co-Authored-By: Christophe Robillard <christophe.robillard@beta.gouv.fr>

app/components/attachment/edit_component.rb

@@ -204,12 +204,14 @@ class Attachment::EditComponent < ApplicationComponent
   end
 
   def allowed_formats
-    return nil unless champ&.titre_identite?
-
     @allowed_formats ||= begin
-                           content_type_validator.options[:in].filter_map do |content_type|
+                           formats = content_type_validator.options[:in].filter_map do |content_type|
                              MiniMime.lookup_by_content_type(content_type)&.extension
                            end.uniq.sort_by { EXTENSIONS_ORDER.index(_1) || 999 }
+
+                           # When too many formats are allowed, consider instead manually indicating
+                           # above the input a more comprehensive of formats allowed, like "any image", or a simplified list.
+                           formats.size > 5 ? [] : formats
                          end
   end
 

app/components/attachment/edit_component/edit_component.html.haml

@@ -23,7 +23,7 @@
     %p.fr-text--sm.fr-text-mention--grey.fr-mb-1w
       - if max_file_size.present?
         = t('.max_file_size', max_file_size: number_to_human_size(max_file_size))
-      - if allowed_formats
+      - if allowed_formats.present?
         = t('.allowed_formats', formats: allowed_formats.join(', '))