- Swap the active tab's bottom corners: the flat rule turning up into
the tab's wall is west+north (╯), and turning back down out of it is
north+east (╰) — had these backwards.
- The left margin belongs to the tab boxes, not the bottom rule: the
rule is one continuous line, so it now runs the full width including
through the margin instead of being indented with the tabs.
- Inactive tab outlines move from "muted" to the dimmer "faint" shade.
- The whole bottom rule is now a single colour (accent, the active
tab's) rather than mixing accent/faint segments — it's one line.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>