\part[{Short}]{Long form}

\chapter[{Short}]{Long form with footnotes\footnote{This is a note}}

\section[{Short}]{This is the full title}

\part[{\textbar{} <Weird> "\textbackslash{}\textbackslash{}one"}]{\textbar{} <Weird> "\textbackslash{}\textbackslash{}one"\footnote{This is a note}\footnote{Second footnote}}

\chapter[{}]{Second <Weird> "\textbackslash{}\textbackslash{}one"\footnote{This is a note}\footnote{Second footnote}}