{"content":"Task 4 complete: implemented native group invite join path for IDChat native. Added simplegroupjoin protocol support, group join node construction, API client access to group join control list, native invite resolution with public/private invite handling, and a native ChatLinkShellPage flow that loads invite details and navigates into NativeChatRoomPage after join. Verified with focused invite tests.","contentType":"text/plain;utf-8","attachments":[],"quotePin":""}