Project entry HTML often only mounts a dev-server app, while built output can be served statically. The desktop open-with policy now only offers the in-app browser for static HTML candidates, and preview-fs rewrites built HTML root-relative assets under the workspace preview path.
Constraint: Frontend project index.html needs a dev server instead of preview-fs static serving
Rejected: Treat every .html file as browser-previewable | project entry HTML can render blank or with missing assets
Confidence: high
Scope-risk: moderate
Tested: cd desktop && bun run check:desktop
Tested: bun run check:server
Tested: git diff --check
Not-tested: bun run verify was intentionally stopped at user request
Each file row in CurrentTurnChangeCard now has a sibling "open with" button
(open_in_new icon) that shows an OpenWithMenu, reusing buildOpenWithItems and
openWithContextForWorkspaceFile. HTML/XHTML files also get the in-app browser
option. Tests and i18n keys (openWith.title) included.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
