#92569 made profile.switch.N unconditional and shipped view.tabSlot.N
unbound, which threw away the hover → focused → workspace tab dispatch
from #74447: holding ⌘ still painted tab-number hints, but the chord
switched profiles. The reporter's real complaint was that the tab
dispatch was hardcoded inside the profile handler, so rebinding the
chord could not separate the two.
Give the keybind registry a `passthrough` action kind: the combo index
keeps every action bound to a chord in registration order, the
dispatcher runs the first and, when a passthrough handler returns
`false`, hands the chord to the next. view.tabSlot.N defaults to ⌘N
ahead of profile.switch.N and declines when no zone is a real tab
strip or the strip has no Nth tab, so ⌘N is "tab N" over a strip and
"profile N" anywhere else. Either action can be rebound on its own,
the panel does not flag the layered pair as a conflict, and the held-⌘
hints key off the tab action they describe.
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