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qwen-code/docs/design/web-shell-file-previews.md
ytahdn c961f4edf9
feat(web-shell): add rendered file previews (#7467) 
Co-authored-by: ytahdn <ytahdn@gmail.com>
2026-07-22 03:35:52 +00:00

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Web Shell file previews

Context

The review tab currently expands source diffs but cannot open rendered output. Workspace HTML artifacts already open in a sandboxed iframe, while Markdown artifacts open as source text. The review tab also opens its optional file tree by default when the panel is wide.

Design

  • Add a file-preview tab to the existing right panel. Review rows always expose a Preview action for HTML and Markdown paths. The tab retains the workspace actions that own the review, so split-pane reviews read from the correct workspace runtime.
  • Keep the row itself responsible for expanding its diff. The separate Preview action does not toggle the diff.
  • Share workspace-file loading across HTML, Markdown, and source previews. HTML remains isolated in the existing sandboxed iframe. Markdown uses the Web Shell Markdown renderer. Other artifact files retain the read-only source view.
  • Initialize the review file tree as closed. Users can still open it with the existing toolbar control.

No daemon or SDK protocol changes are required.

Test strategy

  • Pure helper tests cover rendered-file classification and Markdown artifact preview-content lookup alongside HTML.
  • Per request, do not run browser, E2E, visual, or DOM-rendering UI tests.
  • Run Web Shell lint, typecheck, and build checks.