connect phase: now verifies the connection appears in the list after saving,
not just that the form was dismissed. Prevents false PASS when the LLM
declares connect done before the entry is actually visible.
_precreate_test_session: when external URL (Tailscale) times out from the
CI runner, fall back to localhost:4096 (the runner-local opencode serve).
This ensures the named-session assertion stays active in standard CI runs
while also working when dispatched against a live external server.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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