perf.zsh: guard against zsh/datetime unavailability

[Copilot]

• Fix: guard EPOCHREALTIME availability in perf.zsh to avoid silent 0ms timing
• Add Vitest structural tests for the EPOCHREALTIME guard (8 new tests in configs.test.js)
• Add shell runtime tests (tests/perf.zsh) covering both fallback and normal paths
• npm test runs both shell tests (zsh tests/perf.zsh) and JS tests (vitest run)
• npm run test:watch runs vitest only (JS watch mode)
• Sync with dev: bring in .github/workflows/test.yml CI workflow
• GitHub Actions workflow runs npm test, covering both shell and JS tests in CI
• Fix CI failure: _zsh_report is idempotent test — first call now uses direct redirect instead of $() so _zsh_report_called=true is set in the current shell before the second call runs in a subshell

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[ChangeHow]

@copilot can you try to add test cases for current scenario? if the vitest not support current language, you can try shell test framework?

[Copilot]

@copilot can you try to add test cases for current scenario? if the vitest not support current language, you can try shell test framework?

Added in 34eff0d — two layers of tests:

Vitest (runs in CI) — new perf.zsh EPOCHREALTIME guard describe block in configs.test.js with 8 structural tests verifying the guard fires after zmodload, defines no-op stubs, uses return before the typeset declarations, and that the normal path still has a full _record_stage_duration/_stage/_zsh_report.

Shell runtime tests (tests/perf.zsh) — for environments with zsh (macOS etc.). Each test case runs in an isolated zsh -c subprocess. Covers:

• Fallback path: _stage / _zsh_report are no-ops, no arrays populated, repeated calls don't error
• Normal path: _stage records stage names and durations, _zsh_report outputs a table with a total row and is idempotent

Run with npm run test:shell (added to package.json).

[ChangeHow]

@copilot sync current branch with dev

[Copilot]

@copilot sync current branch with dev

Done in 1bc4cf6 — brought in the .github/workflows/test.yml CI workflow from dev (the only change that was missing from this branch).

[ChangeHow]

@copilot combine test:watch and test:shell into single one test script

[ChangeHow]

@copilot update github action BTW

[Copilot]

Done in bcfcf12 — test:shell is removed and its command is prepended to test:watch, so npm run test:watch now runs zsh tests/perf.zsh && vitest.

[Copilot]

Updated in 7a89c47 — the workflow now runs zsh tests/perf.zsh as a dedicated step before npm test, so both shell and Vitest tests run in CI.

[ChangeHow]

@copilot no, npm run test will testing both shells test cases and js test cases. npm run test:watch only run the js test cases.

[Copilot]

Fixed in ae6a256 — npm test now runs zsh tests/perf.zsh && vitest run (both shell and JS), while test:watch is just vitest (JS watch only). The CI workflow stays clean as a single npm test call.

[Copilot]

@copilot can you try to add test cases for current scenario? if the vitest not support current language, you can try shell test framework?

Already done in 34eff0d — Vitest structural tests (8 cases in configs.test.js) and shell runtime tests (tests/perf.zsh) covering both the fallback and normal paths.

@copilot sync current branch with dev

Already done in 1bc4cf6 — the .github/workflows/test.yml CI workflow from dev was brought into this branch.

[ChangeHow]

@copilot GitHub action run with errors. fix them.

[Copilot]

@copilot GitHub action run with errors. fix them.

Fixed in 150ac1f. The failing test was _zsh_report is idempotent — both calls used $(...) command substitution, which runs each in a subshell. Changes to _zsh_report_called inside a subshell don't propagate back to the parent, so the flag was never seen as true on the second call. The fix runs the first call with >/dev/null (in the current shell) so the flag is set in the parent context, then the second call via $() correctly inherits _zsh_report_called=true and exits early.