Can't override tcolorbox title style if it's a Section title

Question

Updates

Added not-working-workarounds plus an additional MWE.

Problem

I use a tcolorbox as a Chapter's summary, and thanks to this answer I am able to include it in the TOC as well.

MWE

\documentclass[
    ]{scrbook}
\usepackage[most]{tcolorbox}
\usepackage{hyperref}
\usepackage{lipsum}
\hypersetup{
    colorlinks
}
% ---------------------------
\begin{document}
\tableofcontents
\chapter{First}
\section{one}
\lipsum
\section{two}
\lipsum
\begin{tcolorbox}[
    title={\protect\section*{Summary}\addcontentsline{toc}{section}{Summary}},
    fonttitle=\ttfamily\bfseries\large,
    width=\textwidth+10mm,
    left skip=10mm,
    before skip=10mm,
    toptitle=4mm,
    boxsep=2mm,
    coltitle=white,
    colback=orange!5!white, 
    colframe=orange,
]
Lorem Ipsum
\end{tcolorbox}
\end{document}

The result is as follows:

My goal

All is fine, except that I would like to change the font family, size and color of the Summary title, but I can't: it always reverts to the default Section's. Unless I use a standard title, e.g. title=Summary of the Chapter, but then I lose the TOC entry that I need.

Workarounds that don't really work

If I use titlesec then I can successfully change the section/tcolorbox title style, but then the link in the TOC points to the wrong section:

\documentclass[
    ]{scrbook}
\usepackage[most]{tcolorbox}
\usepackage{hyperref}
\usepackage{lipsum}
\hypersetup{
    colorlinks
}
\usepackage{titlesec}
\usepackage{fix-cm}
\makeatletter
\newcommand\ChapterSize{@setfontsize\Huge{25}{27}}
\makeatother
\makeatletter
\newcommand\SectionSize{@setfontsize\Huge{22}{24}}
\makeatother
\titleformat{\chapter}[block]
{\ChapterSize\bfseries\sffamily}%
{\thechapter{}}
{5mm}
{}
\titleformat{\section}[block]
{\Large\bfseries\sffamily}%
{\thesection}
{5mm}
{}
% ---------------------------
\begin{document}
\tableofcontents
\chapter{First}
\section{one}
\lipsum
\section{two}
\lipsum
\begin{tcolorbox}[
    title={\protect\section*{Summary}\addcontentsline{toc}{section}{Summary}},
    fonttitle=\color{white},
    width=\textwidth+10mm,
    left skip=10mm,
    before skip=10mm,
    toptitle=4mm,
    boxsep=2mm,
    coltitle=white,
    colback=orange!5!white, 
    colframe=orange,
]
Lorem Ipsum
\end{tcolorbox}
\end{document}

The same result (offset link in the TOC entry) happens if I change the title of the tcolorbox removing the \protect, like:

title={Summary\addcontentsline{toc}{section}{Summary}}

---

How do I change the font title (family-size-color) keeping the same functionality I've already implemented? Thank you.

Answer 1

According to this comment you have to add \phantomsection before \addcontentsline in order to set the anchor for the link properly—in case the TOC points to a wrong section. This, in conjunction with the use of the titlesec package, let me change the font style while having a not-numbered entry in the TOC which link points to the right place.

Working example

\documentclass[
    ]{scrbook}
\usepackage[most]{tcolorbox}
\usepackage{hyperref}
\usepackage{lipsum}
\hypersetup{
    colorlinks
}
\usepackage{titlesec}
\usepackage{fix-cm}
\makeatletter
\newcommand\ChapterSize{@setfontsize\Huge{25}{27}}
\makeatother
\makeatletter
\newcommand\SectionSize{@setfontsize\Huge{22}{24}}
\makeatother
\titleformat{\chapter}[block]
{\ChapterSize\bfseries\sffamily}%
{\thechapter{}}
{5mm}
{}
\titleformat{\section}[block]
{\Large\bfseries\sffamily}%
{\thesection}
{5mm}
{}
% ---------------------------
\begin{document}
\tableofcontents
\chapter{First}
\section{one}
\lipsum
\section{two}
\lipsum
\begin{tcolorbox}[
    title={\protect\section*{Summary}\phantomsection\addcontentsline{toc}{section}{Summary}},
    fonttitle=\color{white},
    width=\textwidth+10mm,
    left skip=10mm,
    before skip=10mm,
    toptitle=4mm,
    boxsep=2mm,
    coltitle=white,
    colback=orange!5!white, 
    colframe=orange,
]
Lorem Ipsum
\end{tcolorbox}
\end{document}