Add TextDecoder fallback when fatal is unsupported

.changeset/fancy-terms-walk.md

@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Decode text data streams without TextDecoder fatal mode for broader runtime support

src/room/data-stream/incoming/IncomingDataStreamManager.ts

@@ -535,7 +535,7 @@ function bytesToChunks(streamId: string): TransformStream<Uint8Array, DataStream
  * synthesized text chunk decodes independently. The `flush` emits the decoder's trailing bytes.
  */
 function bytesToDecodedUtf8(streamId: string): TransformStream<Uint8Array, DataStream_Chunk> {
-  const decoder = new TextDecoder('utf-8', { fatal: true });
+  const decoder = new TextDecoder('utf-8');
   const encoder = new TextEncoder();
 
   let outIndex = 0;

src/room/data-stream/incoming/StreamReader.ts

@@ -204,7 +204,7 @@ export class TextStreamReader extends BaseStreamReader<TextStreamInfo> {
     // Suppress unhandled rejection on reader.closed — errors are
     // already propagated through reader.read() to the consumer.
     reader.closed.catch(() => {});
-    const decoder = new TextDecoder('utf-8', { fatal: true });
+    const decoder = new TextDecoder('utf-8');
     const signal = this.signal;
 
     const cleanup = () => {