claude-code-chat-browser: YAML escape fix — handle colons, hashes, tabs, bool literals in frontmatter export #231

Job	Run time
API integration tests + coverage (ubuntu-latest)	21s
mypy	19s
Frontend unit tests (vitest) (macos-latest)	21s
API integration tests + coverage (windows-latest)	2m 2s
pytest (windows-latest)	1m 4s
Frontend unit tests (vitest) (ubuntu-latest)	20s
Verify prod requirements.txt is sufficient	13s
Performance benchmarks (gated)	31s
ruff + pip-audit (windows-latest)	55s
Frontend unit tests (vitest) (windows-latest)	53s
ruff + pip-audit (ubuntu-latest)	21s
pytest (macos-latest)	36s
ruff + pip-audit (macos-latest)	27s
API integration tests + coverage (macos-latest)	16s
pytest (ubuntu-latest)	45s
	9m 24s

Provide feedback