Gmail composer chips arrive with inline border:1px solid #ddd + an
assumed white background, so on dark themes they read as a barely-
visible white box with the filename invisible. Override .gmail_chip /
.gmail_drive_chip inside .email-reader-body:
- Strip inline width:386px / height:20px (use auto + max-width:100%),
- Re-flow as inline-flex with a 6px gap so icon + filename align.
- Background tinted with var(--fg) 4%, border = var(--border).
- Anchor uses var(--accent) and the filename span uses var(--fg) so
text is always legible regardless of theme.
- Icon img clamped to 16x16.