Upgrade Husky to v10 and migrate hooks

[mojoatomic]

Upgrade Husky to v10 and migrate hooks

Summary
Husky prints a deprecation warning for our current pre-commit script lines and they will fail in v10. We should upgrade to v10 and migrate our hooks to the new style.

Background
Current warning observed during commits:

husky - DEPRECATED
Please remove the following two lines from .husky/pre-commit:

#!/usr/bin/env sh
. "$(dirname -- "$0")/_/husky.sh"

They WILL FAIL in v10.0.0

Proposed Plan

1. Upgrade Husky
   • npm install -D husky@latest
   • npx husky init # regenerates .husky/ and updates prepare script
2. Migrate hooks to v10 style
   • Remove sourcing of _/husky.sh from all hooks
   • Keep our conditional wiki check (only when .wiki-edit/*.md staged)
   • Keep lint-staged invocation as-is
3. Update package.json
   • Ensure prepare script matches v10 recommendation ("husky")
4. Verify behavior
   • Commit with no wiki changes: skips wiki checker
   • Commit with wiki changes: runs wiki checker
   • CI passes on PRs

Acceptance Criteria

• No deprecation warnings from Husky during commits
• Pre-commit runs wiki checker only when wiki files are staged
• Lint-staged still runs normally
• CI green on the PR that introduces the upgrade

Risks/Notes

• husky init may overwrite existing hooks; we should re-apply our conditional logic
• Ensure developers run npm install to pick up the new version

Follow-ups

• Update WARP.md (Dev rules) with short note about Husky v10 hooks style
• Optionally add a small script to verify developers have Husky v10 installed

References

• Our current .husky/pre-commit contains the deprecated husky.sh sourcing lines.