Persist chat history

priv/gettext/default.pot

@@ -1872,11 +1872,6 @@ msgstr ""
 msgid "Chat about album"
 msgstr ""
 
-#: lib/music_library_web/components/chat.ex
-#, elixir-autogen, elixir-format
-msgid "Clear chat"
-msgstr ""
-
 #: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Send message"
@@ -2308,3 +2303,35 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "No online store templates found"
 msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "%{count} message"
+msgid_plural "%{count} messages"
+msgstr[0] ""
+msgstr[1] ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "Chat history"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "Delete chat"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "New chat"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "No previous chats"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "Untitled"
+msgstr ""

priv/gettext/en/LC_MESSAGES/default.po

@@ -1872,11 +1872,6 @@ msgstr ""
 msgid "Chat about album"
 msgstr ""
 
-#: lib/music_library_web/components/chat.ex
-#, elixir-autogen, elixir-format
-msgid "Clear chat"
-msgstr ""
-
 #: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Send message"
@@ -2308,3 +2303,35 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "No online store templates found"
 msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "%{count} message"
+msgid_plural "%{count} messages"
+msgstr[0] ""
+msgstr[1] ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "Chat history"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Delete chat"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "New chat"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "No previous chats"
+msgstr ""
+
+#: lib/music_library_web/components/chat.ex
+#, elixir-autogen, elixir-format
+msgid "Untitled"
+msgstr ""

priv/repo/migrations/20260317130441_create_chats.exs

@@ -0,0 +1,34 @@
+defmodule MusicLibrary.Repo.Migrations.CreateChats do
+  use Ecto.Migration
+
+  def change do
+    create table(:chats, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :entity, :string, null: false
+      add :musicbrainz_id, :uuid, null: false
+      add :topic, :string
+
+      timestamps(type: :utc_datetime)
+    end
+
+    # Listing chats for a specific entity
+    create index(:chats, [:entity, :musicbrainz_id])
+
+    # Ordered listing of chats for a specific entity
+    create index(:chats, [:entity, :musicbrainz_id, :updated_at])
+
+    create table(:chat_messages, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :role, :string, null: false
+      add :content, :text, null: false
+      add :position, :integer, null: false
+
+      add :chat_id, references(:chats, type: :binary_id, on_delete: :delete_all), null: false
+
+      timestamps(type: :utc_datetime)
+    end
+
+    # Ordered listing of messages within a chat
+    create index(:chat_messages, [:chat_id, :position])
+  end
+end