Conversation browsing
Mobile Chat retains the shared app shell and navigation while compact screens switch between the conversation list and a selected thread. Wide screens keep both panes visible. The list remains scrollable with tall filter content. Conversation pages load automatically when the remaining scroll distance falls below three quarters of the viewport, including when the first page cannot fill the screen. Only one automatic request is made for an unchanged scoped list; failed or empty pages retain a manual Load more action rather than retrying in a loop. The manual action also remains available when filters show no rows. Pagination results and failures from an older workspace or refresh generation cannot publish into the current list. Pending local rows continue to use the existing scoped Chat collection overlay.Composer
Attachments use the adaptive sheet shared by compact and expanded mobile surfaces. Send remains disabled while a message or attachment upload is in flight, and the icon exposes a localized tooltip. This changes neither message transport nor attachment permissions; live device and production verification are still required for delivery. Regression coverage:chat_conversation_layout_test.dart,
chat_pagination_scope_test.dart, and chat_thread_layout_test.dart in
apps/mobile/test/features/chat.