Closes the create-only loop — delete losing worktrees and prune stale ones without
a terminal. Destructive, so guarded hard:
- src/http/worktrees.ts: removeWorktree + pruneWorktrees (execFile, no shell, never
rm -rf; git worktree remove [--force] / git worktree prune). Safeguards:
(1) target realpath must match an entry git itself reports in `git worktree list`
for THIS repo → 404 otherwise (arbitrary FS paths never match, so git is never
invoked against them); (2) reject the MAIN worktree → 400; (3) realpath
containment on request + each list entry, operating on git's canonical path (+ --);
(4) dirty tree without force → 409 "force required"; (5) locked → 409; (6) errors
classified to fixed safe strings (raw stderr/paths never leaked).
- DELETE /projects/worktree + POST /projects/worktree/prune — both behind
requireAllowedOrigin + worktreeEnabled + audit-logged, mirroring the create route.
- public/projects.ts: ✕ remove button per linked-worktree row (hidden for main/locked)
+ a prune button; force needs an explicit second confirm (no single-click data loss).
Verified: typecheck + build:web clean, worktree tests 108 pass (unit covers
reject-non-registered / reject-main / reject-escape / refuse-dirty-without-force /
clean-remove / force-remove / prune), full suite green at --test-timeout=30000.
