Push all current state

frontend_old/database/migrations/003_chat.sql

@@ -29,6 +29,8 @@ CREATE INDEX IF NOT EXISTS idx_messages_conversation_id ON messages(conversation
 CREATE INDEX IF NOT EXISTS idx_messages_created_at ON messages(created_at);
 CREATE INDEX IF NOT EXISTS idx_conversation_participants_user_id ON conversation_participants(user_id);
 
+CREATE INDEX IF NOT EXISTS idx_messages_conversation_created ON messages(conversation_id, created_at DESC);
+
 -- Seed conversations between superadmin and other users
 INSERT INTO conversations (id, created_at) VALUES
     ('c0000000-0000-0000-0000-000000000001', NOW() - INTERVAL '2 hours'),