[Bug]: Mobile: <br> in a Markdown table cell is dropped, so lists in cells run together #28865

Area

apps/mobile

Steps to reproduce

1. Have an assistant message render this table:

   | Item | Value |
   | --- | --- |
   | Completed | • First item<br>• Second item<br>• Third item |

2. Open the same thread in the desktop app and the iOS app.

Desktop shows a list; iOS shows a run-on paragraph.

Expected behavior

Each <br> starts a new line in the cell, as it does on desktop and in GitHub's own Markdown rendering. The three items appear on three lines.

Actual behavior

On iOS the items run together on one wrapped line: • First item • Second item • Third item.

The cause looks intentional. apps/mobile/src/lib/markdownDocument.ts rewrites the tag to a space because a real newline would end the table row:

// A line break would end the table row, so a cell keeps its content on one line.
if (/^<br\b/i.test(tag)) return options.inTableCell ? " " : "  \n";

That protects the row, but the break is lost. A fix would need a way to carry a line break inside a cell through to the native renderer.

Impact

Minor bug or occasional failure

Version or commit

iOS app v2.2.0, server 0.1.3

Environment

iOS app connected to a Windows server. Tested on iOS only; the rewrite is in shared mobile code, so Android is probably affected too.

Workaround

None on the reader's side. An author can avoid <br> in table cells.