Fix broken TUI styling

[michaelkedar]

lipgloss v0.11.0 made it so that all the Style methods no longer mutate the style, which I was relying on.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 65.15%. Comparing base (b1b8bfa) to head (dada9e1).
Report is 5 commits behind head on main.

Files	Patch %	Lines
cmd/osv-scanner/fix/model.go	0.00%	6 Missing ⚠️
internal/tui/in-place-info.go	0.00%	2 Missing ⚠️
internal/tui/vuln-list.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1023   +/-   ##
=======================================
  Coverage   65.15%   65.15%           
=======================================
  Files         149      149           
  Lines       12338    12338           
=======================================
  Hits         8039     8039           
  Misses       3848     3848           
  Partials      451      451           

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