fix(migrate): warn on uncoercible husky version instead of false positive

[jong-kyung]

Summary

• Fix false positive "husky <9.0.0" warning in vp migrate when husky version is a dist-tag ("latest", "next") or other non-semver string
• When semver.coerce() returns null, warn the user to specify a semver-compatible version instead of silently falling back to '0.0.0'
• Change checkUnsupportedHuskyVersion return type from boolean to string | null to co-locate message logic with version checking

Closes #1114

[netlify]

✅ Deploy Preview for viteplus-preview canceled.

Name	Link
🔨 Latest commit	7072892
🔍 Latest deploy log	https://app.netlify.com/projects/viteplus-preview/deploys/69c2966b6480eb000813b3f5

[jong-kyung]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep it up!

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[jong-kyung]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Nice work!

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[fengmk2]

@jong-kyung ci fails, please check again.

[jong-kyung]

@jong-kyung ci fails, please check again.

Thank you for review. The migration-husky-latest-dist-tag-v9-installed fixture needs node_modules/husky/package.json for the detectPackageMetadata fallback, but it was gitignored. Force-added so CI has it too.

[fengmk2]

@jong-kyung Thanks!