Android app: no way to edit a file directly (markdown or otherwise)

Files touched by a session can be viewed from the Android app, but only by scrolling back through the conversation to find the tool-call card for whichever edit happened to touch the file, then tapping it — there's no direct way to open a file by name. It's a search for an incidental mention, not a real file-access path. Once found, markdown renders correctly, but there's still no edit mode: no way to make a change to the file's content from the phone itself, only view it.

Proposed solution

A direct way to browse/open a file from the current session (not dependent on remembering which message happened to touch it), plus an edit mode for markdown at minimum.