- Use padx=(8,4) consistently for the name column in both header and rows,
removing the leading-space text hack in row labels
- Add a 16px spacer at the right end of the header to compensate for
CTkScrollableFrame's internal scrollbar width
- Centre-align Downloaded and Linked columns (header + tick/cross labels)
- Unify update button width to 80px to match header col width
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