style(scaffolds/manual): align figure/table caption gap with Typst template

- Load caption package and set skip=0.65em to match Typst default
  figure/table gap.
- Use small caption font with bold label for manual style.

mytoolkit/scaffolds/manual/main.tex

@@ -15,6 +15,7 @@
 \usepackage{fancyhdr}
 \usepackage{enumitem}
 \usepackage{setspace}
+\usepackage{caption}
 \usepackage{hyperref}
 
 % ---- fonts (Times New Roman + SimSun/SimHei/KaiTi; ctex default set as fallback) ----
@@ -33,6 +34,9 @@
 \setlength{\parindent}{0pt}
 \setlength{\parskip}{0.6em}
 
+% ---- captions (Typst figure/table gap default 0.65em) ----
+\captionsetup{skip=0.65em, font=small, labelfont=bf, labelsep=colon}
+
 % ---- palette (keep in sync with templates/md-to-pdf/manual/template.typ) ----
 \definecolor{primary}{HTML}{1F4E79}
 \definecolor{secondary}{HTML}{2C3E50}