claude-code-chat-browser: Cut v0.1.0 release tag + CHANGELOG #201

Job	Run time
Frontend unit tests (vitest) (windows-latest)	48s
mypy	22s
pytest (ubuntu-latest)	40s
Frontend unit tests (vitest) (ubuntu-latest)	24s
Verify prod requirements.txt is sufficient	7s
ruff + pip-audit (windows-latest)	2m 38s
pytest (windows-latest)	5m 9s
API integration tests + coverage (macos-latest)	20s
Performance benchmarks (gated)	32s
API integration tests + coverage (ubuntu-latest)	20s
ruff + pip-audit (macos-latest)	21s
API integration tests + coverage (windows-latest)	1m 3s
pytest (macos-latest)	29s
ruff + pip-audit (ubuntu-latest)	20s
Frontend unit tests (vitest) (macos-latest)	31s
	14m 4s

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