The resolver's own suite only ever asserted `never` against a LONE pane, so
the whole-stack stranding check passed every existing case while Hide tabs was
dead in the one zone users keep tabs in. Adds the missing count: an explicit
`never` is honored once a closeable tile has a neighbor to cycle to, and those
same stacks still paint their strip on auto (the rung resolves before `mode`,
so a stack it stops claiming has to reach the auto rule).
Verified as a tripwire — reverting the resolver fails the first case.
Brooklyn Nicholson
b0ab2e163a