Resolve product/UX audit findings for the OSS launch: doctor now fails uncredentialed remote providers (no false green), Redact() no longer mangles the common first-run auth error, SSRF-safe loopback exemption unblocks keyless local models, new validated --theme flag, WCAG-AA contrast fixes, NO_COLOR compliance, clearer first-contact errors, and full OSS scaffolding (SECURITY/CoC/CHANGELOG/templates/release workflow). Audit ledger maps every Fixed claim to a real change with zero overclaims.
