Live.Component diff results in client event even when there is no change

Environment

Elixir version (elixir -v):
Phoenix version (mix deps): 1.7.7
Phoenix LiveView version (mix deps): 0.20.0
Operating system: Windows
Browsers you attempted to reproduce this bug on (the more the merrier):
Does the problem persist after removing "assets/node_modules" and trying again? Yes/no:

Actual behavior

Using a Live.Component and issuing send_update to it, then responding with no change in the update/2 callback, returning {:ok, socket} and Liveview will still send a diff to the client: %{c: %{}} even though this is noop

I think the problem is located here: https://github.com/phoenixframework/phoenix_live_view/blob/v0.20.1/lib/phoenix_live_view/diff.ex#L214C56-L214C56

This will return a map where the :c key is set. Since there is no actual change this should not have been set for functionality further down the diff track to be able to return noop

        {diff, cdiffs} = extract_events({diff, cdiffs})

        # Will return a updated map in any case, diff or not
        {Map.put(diff, @components, cdiffs), components, extra}

And this this is expecting an empty map, to say "noop", but due to the lines above it receives %{c: %{}} https://github.com/phoenixframework/phoenix_live_view/blob/v0.20.1/lib/phoenix_live_view/channel.ex#L901C41-L901C41

Expected behavior

Expects no diff to be sent to the client when there is no changes in the assigns of the Live.Component

Possible solution could be something like:

      extract_events({diff, cdiffs})
      |> case do
        {diff, cdiffs} when cdiffs == %{} ->
          {diff, components, extra}

        # Only set `:c` in the diff map if there is actual diff
        {diff, cdiffs} ->
          {Map.put(diff, @components, cdiffs), components, extra}
      end

phoenixframework / phoenix_live_view