feat(guild): GET /channels/:id/members

List explicit channel members (userIds) for the split members sidebar.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/channels/channels.controller.ts

@@ -34,6 +34,13 @@ export class ChannelsController {
     );
   }
 
+  @Get(':id/members')
+  members(@Req() req: AuthedRequest, @Param('id') channelId: string) {
+    const userId = req.userId ?? '';
+    if (!userId) throw new UnauthorizedException('missing user');
+    return this.channelsService.channelMembers(channelId);
+  }
+
   @Post(':id/join')
   join(@Req() req: AuthedRequest, @Param('id') channelId: string) {
     const userId = req.userId ?? '';