The Exit node picker listed bare hostnames; Mullvad-style nodes are
meaningless without their location. Rows are now
"hostname — Country City", sliced from `tailscale exit-node list` by
the header's fixed-width column offsets (COUNTRY/CITY can be
multi-word, so field splitting is wrong by construction); nodes without
a location stay a bare hostname, and the pick strips back to the
hostname at the first space before `tailscale set --exit-node`.
Closes BACKLOG LATER "VPN exit-node richer display"; the VPN
HARDWARE-QUEUE entry now covers the location rows.
Verification: V1 — the awk was proven against a fabricated fixture
(one-word city, multi-word "United States / New York, NY", bare
self-hosted node), flake check exit 0, downstream-template-home builds
(writeShellScriptBin syntax-gates the script). Real `tailscale
exit-node list` output stays V3 (existing VPN menu live-paths entry).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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