fix: emit valid Claude Code hook schema in settings.json

[pashak1207]

Claude Code rejects the file generated by code-review-graph install with "Expected array, but received undefined" because each entry under PostToolUse/SessionStart needs an inner hooks: [{type, command}] array, not a flat command: field. On top of that, the generator emits a PreCommit block — which isn't a Claude Code event at all.

Consequence: the entire settings.json is discarded, so neither the PostToolUse auto-update hook nor the SessionStart status hook ever fires.

This rewrites generate_hooks_config() to produce the correct schema, drops the bogus PreCommit block, and narrows the PostToolUse matcher from Edit|Write|Bash to Edit|Write. Bash calls in Claude Code don't modify source files directly, so running an incremental graph update after every shell command was just noise.

Tests in TestGenerateHooksConfig were updated to assert the new schema, plus a new regression test (test_entries_use_claude_code_hook_schema) guards against the flat-command shape recurring.

Fixes #97, #163, #172.

[ZzAve]

FWIW: I applied these fixed to my local setup and can confirm code-review-graph to be working with claude.

[tirth8205]

Closing in favor of #208 which was just merged and provides a more complete fix.

Your PR correctly fixes the two critical bugs: nested hooks array wrapper and removal of the invalid PreCommit event. The narrowing of the PostToolUse matcher from Edit|Write|Bash to Edit|Write is a reasonable call too.

However, there is one remaining issue in this PR: the timeouts (5000, 3000) are still in milliseconds. According to the Claude Code docs, timeout values are in seconds. Leaving them at 5000 would mean an 83-minute timeout on the PostToolUse hook. PR #208 correctly converts these to 30s and 10s.

PR #208 also adds a new install_git_hook() function that restores the pre-commit intent (which was lost when removing the invalid PreCommit hook event) by writing a proper .git/hooks/pre-commit script instead — with tests for create, append, idempotent, and no-.git-dir cases.

Thank you for the contribution — identifying the timeout unit bug was a key insight.