add ids to dynamic date and datetime elements

lib/memex_web/components/core_components.ex

@@ -136,6 +136,7 @@ defmodule MemexWeb.CoreComponents do
     """
   end
 
+  attr :id, :string, required: true
   attr :datetime, :any, required: true, doc: "A `DateTime` struct or nil"
 
   @doc """
@@ -151,6 +152,7 @@ defmodule MemexWeb.CoreComponents do
 
   defp cast_datetime(_datetime), do: ""
 
+  attr :id, :string, required: true
   attr :date, :any, required: true, doc: "A `Date` struct or nil"
 
   @doc """

lib/memex_web/components/core_components/user_card.html.heex

@@ -16,7 +16,7 @@
           "user confirmed on%{confirmed_datetime}",
           confirmed_datetime: ""
         ) %>
-        <.datetime datetime={@user.confirmed_at} />
+        <.datetime id={"#{@user.id}-confirmed-at"} datetime={@user.confirmed_at} />
       <% else %>
         <%= gettext("email unconfirmed") %>
       <% end %>
@@ -27,7 +27,7 @@
         "user registered on%{registered_datetime}",
         registered_datetime: ""
       ) %>
-      <.datetime datetime={@user.inserted_at} />
+      <.datetime id={"#{@user.id}-inserted-at"} datetime={@user.inserted_at} />
     </p>
   </h3>