fix(editable_champ): can enter negative decimal number

app/javascript/controllers/format_controller.ts

@@ -54,6 +54,6 @@ export class FormatController extends ApplicationController {
     const decimalSeparator =
       value.lastIndexOf(',') > value.lastIndexOf('.') ? ',' : '.';
 
-    return value.replace(new RegExp(`[^\\d${decimalSeparator}]`, 'g'), '');
+    return value.replace(new RegExp(`[^-?\\d${decimalSeparator}]`, 'g'), '');
   }
 }

spec/system/users/brouillon_spec.rb

@@ -199,6 +199,11 @@ describe 'The user' do
     wait_until {
       champ_value_for('nombre décimal') == '1234.56'
     }
+
+    fill_in('nombre décimal', with: '-1,234.56')
+    wait_until {
+      champ_value_for('nombre décimal') == '-1234.56'
+    }
   end
 
   scenario 'extends dossier experation date more than one time, ', js: true, retry: 3 do