Remove requirement for ReceivedChatMessage to have an explicit type key (#1241)

Author: 1egoman

.changeset/honest-needles-throw.md

@@ -0,0 +1,5 @@
+---
+'@livekit/components-core': patch
+---
+
+Remove requirement for ReceivedChatMessage to have an explicit type key

packages/core/etc/components-core.api.md

@@ -433,10 +433,9 @@ export type ReceivedAgentTranscriptionMessage = ReceivedMessageWithType<'agentTr
 }>;
 
 // @public (undocumented)
-export type ReceivedChatMessage = ReceivedMessageWithType<'chatMessage', ChatMessage & {
-    from?: Participant;
-    attributes?: Record<string, string>;
-}>;
+export type ReceivedChatMessage = Omit<ReceivedChatMessageWithRequiredType, 'type'> & {
+    type?: 'chatMessage';
+};
 
 // @public (undocumented)
 export interface ReceivedDataMessage<T extends string | undefined = string> extends BaseDataMessage<T> {

packages/core/src/messages/types.ts

@@ -15,15 +15,20 @@ type ReceivedMessageWithType<Type extends string, Metadata extends object = obje
   attributes?: Record<string, string>;
 } & Metadata;
 
-/** @public */
-export type ReceivedChatMessage = ReceivedMessageWithType<
+/** @private */
+type ReceivedChatMessageWithRequiredType = ReceivedMessageWithType<
   'chatMessage',
   ChatMessage & {
     from?: Participant;
     attributes?: Record<string, string>;
   }
 >;
 
+/** @public */
+export type ReceivedChatMessage = Omit<ReceivedChatMessageWithRequiredType, 'type'> & {
+  type?: 'chatMessage';
+};
+
 export type ReceivedUserTranscriptionMessage = ReceivedMessageWithType<
   'userTranscript',
   {