Localizza errori API, sistema layout mobile e documenta allineamento iOS.

Gli header Accept-Language dalle app e i fix di padding/menu sul web chiudono il giro password-policy; il doc guida il lavoro su Mac.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/controllers/public/accounts_controller.rb

@@ -29,8 +29,8 @@ module Public
       )
 
       unless result.ok?
-        flash.now[:alert] = t("flash.accounts.password_#{result.error}")
-        return render :show, status: :unprocessable_entity
+        redirect_to public_account_path, alert: t("flash.accounts.password_#{result.error}")
+        return
       end
 
       redirect_to public_account_path, notice: t("flash.accounts.password_updated")