fix streamSupportedChannels

.cursor/rules/project.mdc

@@ -103,3 +103,9 @@ Use `bun` as the preferred package manager and script runner for the frontend (`
 - `bun run dev` for development server
 - `bun run build` for production build
 - `bun run i18n:*` for i18n tooling
+
+### Rule 4: New Channel StreamOptions Support
+
+When implementing a new channel:
+- Confirm whether the provider supports `StreamOptions`.
+- If supported, add the channel to `streamSupportedChannels`.