Move all chat related code under chats

lib/music_library/chats/artist_chat.ex

@@ -1,9 +1,9 @@
-defmodule MusicLibrary.ArtistChat do
+defmodule MusicLibrary.Chats.ArtistChat do
   @moduledoc """
   Chat implementation for artists using OpenAI streaming with Wikipedia context.
   """
 
-  @behaviour MusicLibrary.Chat
+  @behaviour MusicLibrary.Chats.StreamProvider
 
   alias MusicLibrary.Artists.ArtistInfo
 

lib/music_library/chats/record_chat.ex

@@ -1,9 +1,9 @@
-defmodule MusicLibrary.RecordChat do
+defmodule MusicLibrary.Chats.RecordChat do
   @moduledoc """
   Chat implementation for records using OpenAI streaming with web search.
   """
 
-  @behaviour MusicLibrary.Chat
+  @behaviour MusicLibrary.Chats.StreamProvider
 
   alias MusicLibrary.Records.Record
 

lib/music_library/chats/stream_provider.ex

@@ -1,4 +1,4 @@
-defmodule MusicLibrary.Chat do
+defmodule MusicLibrary.Chats.StreamProvider do
   @moduledoc """
   Behaviour for streaming AI chat with entity-specific context.
   """

lib/music_library_web/live/artist_live/show.ex

@@ -496,7 +496,7 @@ defmodule MusicLibraryWeb.ArtistLive.Show do
         title={@artist.name}
         entity={:artist}
         musicbrainz_id={@artist.musicbrainz_id}
-        chat_module={MusicLibrary.ArtistChat}
+        chat_module={MusicLibrary.Chats.ArtistChat}
         chat_context={{@artist, @artist_info}}
         placeholder={gettext("Ask about this artist...")}
         empty_prompt={gettext("Ask anything about this artist")}

lib/music_library_web/live/collection_live/show.ex

@@ -308,7 +308,7 @@ defmodule MusicLibraryWeb.CollectionLive.Show do
         title={@record.title}
         entity={:record}
         musicbrainz_id={@record.musicbrainz_id}
-        chat_module={MusicLibrary.RecordChat}
+        chat_module={MusicLibrary.Chats.RecordChat}
         chat_context={{@record, @embedding_text}}
         placeholder={gettext("Ask about this album...")}
         empty_prompt={gettext("Ask anything about this album")}

lib/music_library_web/live/wishlist_live/show.ex

@@ -253,7 +253,7 @@ defmodule MusicLibraryWeb.WishlistLive.Show do
         title={@record.title}
         entity={:record}
         musicbrainz_id={@record.musicbrainz_id}
-        chat_module={MusicLibrary.RecordChat}
+        chat_module={MusicLibrary.Chats.RecordChat}
         chat_context={{@record, @embedding_text}}
         placeholder={gettext("Ask about this album...")}
         empty_prompt={gettext("Ask anything about this album")}