Problem

PARSEC_GITHUB_TOKEN is a single env var — it can't distinguish between hosts. When working across github.com (personal) and GitHub Enterprise (work), the wrong token gets used → 401.

Solution

Add per-host token config in parsec config:

[github."github.com"]
token = "ghp_personal_xxx"

[github."github.daumkakao.com"]
token = "ghp_work_yyy"

Token resolution priority:

1. config.github.<remote_host>.token — host-specific config
2. PARSEC_GITHUB_TOKEN env var — explicit override
3. GITHUB_TOKEN / GH_TOKEN — generic fallback
4. gh auth token --hostname <host> — CLI fallback

Implementation

• Parse remote URL to detect host (already done via GitHubRemote)
• Pass host to resolve_github_token(host)
• Add GithubHostConfig struct with token field
• Add github: HashMap<String, GithubHostConfig> to ParsecConfig
• Update config show to display configured hosts (mask tokens)

Related

• GitHub token fallback chain (gh auth token) #65 introduced gh auth token fallback but without hostname