v0.4.0

What's Changed

• feat(files): open .html with a sandboxed rendered preview + source toggle by @fbereilh in #45
• fix(databricks): surface the re-auth command for an expired profile token by @fbereilh in #46
• fix(test): build before e2e, refuse a stale build, run 2-wide by @fbereilh in #47
• feat(mcp): four agent-ergonomics fixes (array cap, move by handle, batch delete, leaner schemas) by @fbereilh in #48

Full Changelog: v0.3.3...v0.4.0