fix(dev-fkeys): F6 elisp runner uses basename, not rel-path

I shipped Phase 2a with `cj/--f6-test-runner-cmd-for' building `make test-file FILE=<rel-path>' for elisp test files (e.g., FILE=tests/test-foo.el). The project Makefile prepends `tests/' to FILE itself, so the full invocation expands to `tests/tests/test-foo.el' and emacs reports "Cannot open load file". The bug surfaced on a live-test in step 7 of the Phase 2a smoke plan.

Fix: pass `(file-name-nondirectory rel-path)' so the Makefile gets just `test-foo.el' and re-prepends `tests/' itself.

Two unit tests in `test-dev-fkeys--f6-test-runner-cmd-for.el' had encoded the wrong expectation (the rel-path form). Two orchestrator tests in `test-dev-fkeys--f6-current-file-tests-impl.el' inherited the same wrong assertion via integration. Updated all four to assert the basename form.

Verified: full suite green, including the 4 updated tests. Live re-test on `tests/test-dev-fkeys--f6-language-detect.el' should now produce the working `make test-file FILE=test-dev-fkeys--f6-language-detect.el'.

1 files changed, 3 insertions, 1 deletions

diff --git a/modules/dev-fkeys.el b/modules/dev-fkeys.el
index 0bb720b1..9c695674 100644
--- a/modules/dev-fkeys.el
+++ b/modules/dev-fkeys.el
@@ -261,7 +261,9 @@ TypeScript / JavaScript and unknown languages return nil."
   (pcase language
     ('elisp
      (if is-test-file
-         (format "make test-file FILE=%s" rel-path)
+         ;; The project Makefile prepends `tests/' to FILE, so pass the
+         ;; basename only — passing the rel-path produces `tests/tests/...'.
+         (format "make test-file FILE=%s" (file-name-nondirectory rel-path))
        (format "make test-name TEST=^test-%s-" stem)))
     ('python
      (if is-test-file