docs: "Re-popping the same panel isn't possible" caveat contradicts the documented dock→re-pop flow

[carochacs]

CLAUDE.md's Caveats section states:

Re-popping the same panel isn't possible (it's removed from the layout on the first pop)

The parenthetical doesn't support the claim as a general statement. "Removed from the layout" describes the mechanism of popping, not a barrier to repetition. The same document's Pop-out section describes dockFollowerPanel() → _redockPanel() re-instating a docked panel back into the main layout — after which nothing described prevents popOutPanel() being called on it again.

Two readings are possible and the doc should pick one:

1. "A panel can't be popped twice concurrently" — trivially true of any panel, and not really a caveat worth calling out.
2. "Once popped, even after being docked back, that panel can never be popped again for the rest of the session" — if this is actually true, the real blocking mechanism (e.g. a popupId that's consumed/exhausted and not reset on dock) needs to be named, since nothing in the documented dock flow explains why it would hold.

Suggest verifying against the actual behavior (pop → dock → pop again) and either removing the caveat (if reading 1 is what was meant and it's not actually noteworthy) or naming the real mechanism (if reading 2 is accurate) and possibly filing it as a bug if unintentional.

[pullfrog]

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