feat: implement lefthook pre-commit hooks across workspace repos

[mairas]

Summary

Add lefthook pre-commit hooks to workspace repos to run format and lint checks locally before commits. This will catch CI failures early and reduce failed PR checks.

Background

CI checks fail frequently because formatting and linting issues are only caught after pushing to GitHub. There are currently no local git hooks to catch these issues before commit.

Tool Choice: Lefthook

• Fast Go binary, zero runtime dependencies
• Check-only mode (no auto-fix) to match CI behavior exactly
• Pre-commit hooks only

Repos to Implement

Repo	Language	Issue	PR
homarr-container-adapter	Rust	halos-org/homarr-container-adapter#20	halos-org/homarr-container-adapter#21
HALPI2-rust-daemon	Rust	hatlabs/HALPI2-rust-daemon#88	hatlabs/HALPI2-rust-daemon#89
container-packaging-tools	Python	halos-org/container-packaging-tools#136	halos-org/container-packaging-tools#137
cockpit-networkmanager-halos	TypeScript	halos-org/cockpit-networkmanager-halos#2	halos-org/cockpit-networkmanager-halos#3
cockpit-apt	Python + TypeScript	halos-org/cockpit-apt#122	halos-org/cockpit-apt#123

Implementation Plan

Per-repo tasks

1. Add lefthook.yml configuration
2. Add hooks-install command to run script
3. Update README with developer setup instructions
4. Test with lefthook run pre-commit
5. Create PR

Workspace tasks

• Update docs/LIFE_WITH_CLAUDE.md with lefthook setup instructions (docs: add lefthook setup instructions to workspace docs #52)
• Mention in AGENTS.md that hooks should be installed (docs: add lefthook setup instructions to workspace docs #52)

Developer Setup (after implementation)

# One-time: Install lefthook
brew install lefthook

# Per-repo: Enable hooks
cd <repo>
./run hooks-install

# Skip hooks when needed
git commit --no-verify -m "WIP: message"

Tracking

• feat: add lefthook pre-commit hooks for format/lint checks homarr-container-adapter#20 → PR docs: Add comprehensive development workflow documentation #21
• feat: add lefthook pre-commit hooks for format/lint checks hatlabs/HALPI2-rust-daemon#88 → PR chore: migrate org references from hatlabs to halos-org #89
• feat: add lefthook pre-commit hooks for format/lint checks container-packaging-tools#136 → PR #137
• feat: add lefthook pre-commit hooks for format/lint checks cockpit-networkmanager-halos#2 → PR Remove casaos-docker-service submodule #3
• feat: add lefthook pre-commit hooks for format/lint checks cockpit-apt#122 → PR #123
• Workspace documentation updated → PR docs: add lefthook setup instructions to workspace docs #52

[mairas]

Done.