Add terminal transcript export to the desktop terminal

[Copilot]

This PR addresses the feature-enhancement request by adding a small, high-value workflow improvement to the desktop terminal. Users can now export the active terminal session transcript directly from the UI, which makes it easier to retain command output for evidence, notes, or reporting.

• Terminal transcript export

  • Added an export action for the active terminal session.
  • Exposes the action in both the terminal header and the terminal context menu.
  • Generates a timestamped .txt download with a sanitized session-based filename.

• Export behavior

  • Reads the active xterm buffer and serializes visible + scrollback content into plain text.
  • Trims trailing empty lines to avoid noisy exports.
  • Disables export when no terminal session is active.
  • Shows a lightweight toast for empty exports and successful downloads.

• Documentation

  • Updated the terminal feature description in README.md to reflect transcript export support.

const filename = exportTerminalTranscript(terminal.xterm, terminal.name);

if (!filename) {
  toast({ title: "Nothing to export", description: "Run a command to capture terminal output first." });
  return;
}

toast({ title: "Session exported", description: filename });

• Files changed

  • apps/desktop/src/pages/Terminal.tsx
  • apps/desktop/src/lib/terminal-export.ts
  • README.md

• screenshot
  

Original prompt

Check for possible enhancement in term of features

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