Say what stood in the way when a click never lands

The two full-screen range picker tests give up after the full timeout on
the runner's Firefox, and nowhere else. Playwright waits for a click
target to be visible, still, enabled and on top, and reports none of
those when it gives up — so the failure says only that 45 seconds
passed.

Both tests now name the element the browser would hit at the toggle's own
centre before they press it (`hitTarget()`), so a covered or undrawn
control fails with what covered it rather than with a timeout. The run
also keeps the screenshots Playwright writes for a failure, as an
artifact: a page that only misbehaves there is otherwise invisible from a
workstation where all three engines pass.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.github/workflows/tests.yml

@@ -102,3 +102,15 @@ jobs:
         run: vendor/bin/pest --testsuite=Browser --browser ${{ matrix.browser }}
         env:
           BROWSER_TIMEOUT: 45000
+
+      # What the runner saw when an assertion or an action gave up. A failure that does not
+      # reproduce on a workstation is otherwise only a stack trace: the page itself says whether an
+      # element was covered, unstyled or never drawn.
+      - name: Keep the screenshots of what failed
+        if: failure()
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          name: screenshots-${{ matrix.browser }}
+          path: tests/Browser/Screenshots
+          if-no-files-found: ignore
+          retention-days: 7