Text after caption causes unintended line breaks or centering

Question

I want my figure captions to have the following format:

• Figure number is bold
• First couple of words are the title of the figure and always bold
• Rest of caption is not bold

Here's my MWE:

\documentclass{report}

\usepackage{graphicx}
\usepackage[labelfont=bf,textfont=bf]{caption}

\begin{document}
\begin{figure}
    \centering
    \includegraphics[width=\textwidth]{cat}
    \caption{A cat} depicted sitting at the table.
\end{figure}
\end{document}

This makes the following:

I don't like this because the caption shouldn't be centered and also the non-bold text shouldn't be on a new line. It should look like this:

And the name of the figure in the list of figures (not shown) should be only the bold portion, not the whole thing.

Unacceptable solutions:

• Removing textfont=bf and then bolding A cat - figure caption will be too long in list of figures.
• Using the short title parameter of \caption - I will end up typing every title twice, it's annoying and violates DRY.

Answer 1

What about this? Use the command

\mycaption[A cat]{depicted sitting at the table.} 

In this case you don't need to type it twice; you only need to split it.

\documentclass{report}
\usepackage{graphicx}
\usepackage[labelfont=bf]{caption}
\newcommand{\mycaption}[2][]{\caption[#1]{\textbf{#1} #2}}

\begin{document}
\listoffigures    
\begin{figure}\centering
    \includegraphics[width=\textwidth]{example-image-a}
    \mycaption[A cat]{depicted sitting at the table.}
\end{figure}
\end{document}