Onboarding · Help: articles in a list the keyboard walks, a long address cut

HelpPanel lists its articles in lists::SelectableList: the list is one
stop whose cursor scrolls into view, and Enter or a double press opens
an article, focus going to All articles as before. SelectableList now
activates on Enter's release, armed by its own press, as the palette
and menus pick: an activation that moves focus left the release to
press what took it, here the way back. ContactSupport cuts a long
address in the middle and puts a Copy beside it. The lists tests move
into a folder, the release tests on their own.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

TASKS.md

@@ -411,3 +411,4 @@ Per-component lines live in `tasks/`. Tags there:
 | T36c | 2 | PASS | |
 | T37a | 1 | FAIL | the wizard's Next and Back dropped focus as the flow turned; Got it stranded focus on a closed tip; the words read and the bar's share untested apart from their selectors |
 | T37a | 2 | PASS | |
+| T37b | 1 | FAIL | the help panel's rows were bare Tab stops, not a list the keyboard walks; a long support address drew past 280px |