fix(statusline): getPkgVersion() resolves main repo node_modules when CWD is a git worktree (#2742)

[michaelaperez-byte]

Summary

Fixes #2742

When Claude Code runs inside a git worktree (common multi-agent pattern), the worktree has no node_modules of its own. getPkgVersion() in the generated statusline (statusline.cjs) probed CWD/node_modules/... — which all missed — causing the statusline to show a stale baked-in version instead of the actually-installed one.

Fix

Added a worktree probe to getPkgVersion() that resolves the main repo node_modules when CWD is a linked worktree. In a worktree, .git is a plain file containing gitdir: /path/to/main/.git/worktrees/<name>. The probe:

1. Walks up from CWD to find the nearest .git entry
2. If .git is a file (worktree indicator), reads the gitdir: line
3. Extracts the main repo root via lastIndexOf('/.git/worktrees/')
4. Adds the main repo node_modules/ruflo/package.json and node_modules/@claude-flow/cli/package.json to the candidate paths

Pure fs operations — no process spawn (matches the template design constraint for the render path). Slots into the existing candidate list before the #2221 global-install probes, so the highest-version-wins selection applies unchanged.

Changes

File	Change
.claude/helpers/statusline.cjs	+27 lines (worktree probe in getPkgVersion())
v3/@claude-flow/cli/.claude/helpers/statusline.cjs	+27 lines (identical, drift-guard enforced)
v3/@claude-flow/cli/__tests__/issue-2742-worktree-pkg-version.test.ts	+125 lines (5 test cases)

Total: 3 files, +179 lines, 0 deletions (additive only).

Verification

Independent detached-HEAD worktree verification — all gates PASS:

• Gate 1 (Diff review): Worktree probe correctly placed between CWD probes and Statusline shows RuFlo V3.6 for global npm installs — statusline-generator version probe never checks the global node_modules (survives #2195) #2221 global probes. Pure fs, additive, both copies identical.
• Gate 2 (Syntax check): node --check exit 0 on both .cjs copies.
• Gate 3 (Drift guard): diff of both copies = zero differences.
• Gate 4 (Regression test): 5/5 new tests PASS.
• Gate 5 (Existing tests): statusline-cost-display (13/13), issue-2682-identity (2/2), issue-2694-cve-counter (8/8) all PASS — zero regressions.
• Gate 6 (Functional sanity): Logic traced — worktree .git file -> main repo root -> correct paths. Normal repo .git directory -> correctly skipped.

Context

Same function/lineage as #2195 and #2221 — this closes the remaining resolution gap for worktree environments. Reporter (Markus-Buchholz) provided the code snippet; this PR adapts it to the existing code style.

Generated by ruflo-loop (z-ai/glm-5.2, cheap tier).

[michaelaperez-byte]

Superseded by merged PR #2747