v0.69.0

What's Changed

• feat: native reasoning + folded work block + streamdown chat markdown by @mabry1985 in #1328
• test(web): full markdown-surface smoke test (chat renderer audit) by @mabry1985 in #1329
• feat(web): adopt the DS Markdown renderer (@protolabsai/ui 0.48) — closes #1330 by @mabry1985 in #1331
• docs(changelog): backfill [Unreleased] for native reasoning + DS markdown by @mabry1985 in #1332

Full Changelog: v0.68.0...v0.69.0