Reduce vspace in toc and set roman letters in geometry frame

Question

Hey i have two problems with my table of contents: First I would like to reduce the vspace between chapters (or sections ...). The second problem is that long roman letters in appendix are too wide outside the frame of geometry.

I found the solution for each problems, but I can solve only one problem, not both together. Maybe the two packages make problems?

\documentclass[ngerman]{scrreprt}
\usepackage[T1]{fontenc}
\usepackage{babel}
\newcounter{SeitenzahlSpeicher}

% Set long roman letters in geometry frame
\usepackage[tocindentauto]{tocstyle}
\usetocstyle{KOMAlike}
\settocstylefeature{pagenumberbox}{\hbox}

% Reducing vspace in toc
\usepackage{tocbasic}
\DeclareTOCStyleEntry[
beforeskip=.1em plus 1pt,
pagenumberformat=\textbf,
]{tocline}{chapter}

\usepackage{blindtext}

\begin{document}
\pagenumbering{Roman}
\tableofcontents
\chapter{Test}
\chapter{Test}
\chapter{Test}
\chapter{Test}
\setcounter{SeitenzahlSpeicher}{\value{page}}
\pagenumbering{arabic}
\chapter{Test}
\pagenumbering{Roman}
\setcounter{page}{\theSeitenzahlSpeicher}
\appendix
\chapter{Test}
\blindtext[50]
\chapter{Test}
\end{document}

Here with reducing space:

Here with roman letters in frame:

When I add the solution from Pieter for section level, the dotlines are to short.

Answer 1

Note that the KOMA-Script class loads package tocbasic automatically. So you should remove \usepackage{tocbasic}.

You can use \mbox for the page numbers in TOC, LOT and LOF with

\DeclareTOCStyleEntries[
  pagenumberbox=\mbox
]{tocline}{
  part,chapter,
  section,subsection,subsubsection,
  paragraph,subparagraph,
  figure,table
}

Example:

\documentclass[ngerman]{scrreprt}% loads package tocbasic
\usepackage{blindtext}% only for dummy text
\usepackage[T1]{fontenc}
\usepackage{babel}

\DeclareTOCStyleEntry[
  beforeskip=.1em plus 1pt
]{tocline}{chapter}

\DeclareTOCStyleEntries[
  pagenumberbox=\mbox
]{tocline}{
  part,chapter,
  section,subsection,subsubsection,
  paragraph,subparagraph,
  figure,table
}

\begin{document}
\pagenumbering{Roman}
\tableofcontents
\chapter{Test}
\chapter{Test}
\chapter{Test}
\Blinddocument
\Blinddocument
\end{document}

Answer 2

Forget about the tocstyle stuff, it is outdated, and it isn't even part of TeX Live. tocbasic can do it with the pagenumberwidth parameter. Just make it big enough that the Roman numbers fit in it.

\usepackage{tocbasic}
\DeclareTOCStyleEntry[
  beforeskip=.1em plus 1pt,
  pagenumberformat=\textbf,
  pagenumberwidth=2cm,
]{tocline}{chapter}