test(cli): fail-closed on directoryRejected / empty / unloadable + browserTest exit

[bpamiri]

Refs #3083 (does not close).

wheels test exited 0 on runner-honesty failures that tools/test-local.sh and tools/ci/run-tests.sh already treat as exit 1 (directoryRejected, bundlesDiscovered == 0). Unloadable *Spec.cfc files got a WARN in displayTestResults but did not set testsFailed. wheels browser test printed Fail/Error then always return "" (LuCLI success).

TDD on this branch:

1. Helper stubs + boolean specs (red → green)
2. Throw-seam specs against no-op $throwIf* (red)
3. Compose $throwIf* from the helpers; runTests / browserTest call them as the only Wheels.TestsFailed sites (green)

Desk accepted $throwIf* seam specs as process-exit PROVEN. Specs call the seams with stub JSON; no live runTests/browserTest HTTP.

BLOCKER 1 — wheels test fail-closed

$cliTestResultFailed owns the boolean. $throwIfCliTestsFailed throws Wheels.TestsFailed when that helper is true. runTests stashes the JSON + unloadable probe, then calls the seam after the report flushes (so the throw is not swallowed as a crashed run).

BLOCKER 2 — wheels browser test fail-closed

$browserTestResultFailed owns the boolean. $throwIfBrowserTestsFailed throws Wheels.TestsFailed when Fail/Error > 0. Both the text path and --format=json call this seam; missing Playwright / unreachable server still return "".

Red → green

Filter / URL: GET http://localhost:8080/wheels/cli/tests?format=json. Isolate cli.lucli.tests.specs.commands.TestExitFailClosedSpec in bundleStats.

Step	SHA	TestExitFailClosedSpec
Helper red	f63ddd719	5 failed / 4 passed
Helper green	cecba650e	9 passed
Throw-seam red	ae6d7abe0	7 failed / 11 passed — all fail-shape toThrow red (did not throw … Type=[Wheels.TestsFailed]); helper specs + clean-pass notToThrow green
Throw-seam green	8320573b9	18 passed / 0 failed / 0 error

Throw-lock its that went red then green:

• $throwIfCliTestsFailed — directoryRejected / bundlesDiscovered=0 / specsFailedToLoad>0 / totalFail>0 / totalError>0
• $throwIfBrowserTestsFailed — totalFail>0 / totalError>0
• Clean-pass notToThrow on both seams stayed green through both SHAs

HEAD: 8320573b9a0cdb503dc07f5522b6c79c3c73a578

Required CI checks

• Validate Commit Messages
• Lucee 7 + SQLite (LuCLI)
• Verify docs (cli/lucli/**)