fix(init): detect and clean up orphaned .github/hooks/rtk-rewrite.json with broken hook command

[rolf-quadra]

Fixes #836

What

• rtk init --show: warns when .github/hooks/rtk-rewrite.json exists with "command": "rtk hook" (missing subcommand), with actionable guidance pointing to rtk gain --failures and the fix
• rtk init -g --uninstall: removes the broken file as part of standard cleanup (only when the command is the broken "rtk hook" — a correctly configured "rtk hook copilot" file is left untouched)

Why

Users who ran an earlier rtk init --copilot (introduced in #605) got .github/hooks/rtk-rewrite.json with "command": "rtk hook" (no subcommand). Since rtk hook requires gemini or copilot, it prints help and exits non-zero on every Bash tool call. RTK silently logs a parse_failure with raw_command = "hook" and fallback_succeeded = 0 in history.db, inflating rtk gain --failures stats with no visible error to the user.

The pending Copilot integration (#823) correctly generates "rtk hook copilot", but neither rtk init --show nor rtk init --uninstall check .github/hooks/ for these orphaned files.

Changes

src/init.rs only — 66 lines added, no deletions, no new dependencies.

Test

# Reproduce
echo '{"hooks":{"PreToolUse":[{"type":"command","command":"rtk hook","cwd":".","timeout":5}]}}' \
  > .github/hooks/rtk-rewrite.json

# Should warn
rtk init --show

# Should remove
rtk init -g --uninstall
ls .github/hooks/rtk-rewrite.json  # should be gone

[CLAassistant]

All committers have signed the CLA.

[aeppling]

Hey

We are cleaning up the codebase and improving the project structure for better onboarding. As part of this effort, PR #826 reorganizes src/ from a flat layout into subfolders.

No logic changes — only file moves and import path updates.

What you need to do

Rebase your branch on develop when receiving this comment:

git fetch origin && git rebase origin/develop

Git detects renames automatically. If you get import conflicts, update the paths:

use crate::git;        // now: use crate::cmds::git::git;
use crate::tracking;   // now: use crate::core::tracking;
use crate::config;     // now: use crate::core::config;
use crate::init;       // now: use crate::hooks::init;
use crate::gain;       // now: use crate::analytics::gain;

Need help rebasing? Tag @aeppling

[rolf-quadra]

Refactored to comply with the repository reorg.