I'm not crazy. My mother had me tested.
That is correct. Any card that has at least one focus token can not be used to take an action or generate resources.
Where in the rulebook is the can't take an action part?
I don't mean declare as an attacker/defender/strike I mean as action defined by the rules, such as a droids repair ability.
Here is the section on exhausted units from page 27 of the rulebook:
A card that is exhausted (i.e. has one or more focus
tokens on it) cannot be focused to pay for card effects,
cannot focus to strike, and cannot generate resources.
However, other card abilities of an exhausted card
may still be triggered, and its constant effects (if any)
are still active, as long as such abilities do not require
the card to focus, to be ready, or are not otherwise
prohibited by the card text.