b6a51c955e
- Remove *** placeholder detection from _sanitize_env_lines (was based on confusing terminal redaction with literal file content) - Add migrate_config() logic to clear stale ANTHROPIC_TOKEN when better credentials exist (ANTHROPIC_API_KEY or Claude Code auto-discovery) - Old ANTHROPIC_TOKEN values shadow Claude Code credential fallthrough, breaking auth for users who updated without re-running setup - Preserves ANTHROPIC_TOKEN when it's the only auth method available - 3 new migration tests, updated existing tests