Render the section cards in two columns when the page is wide (>1000px):
left = Theme, Wallet, Node & Security; right = Explorer, Chat & Contacts,
About; Debug spans full width below. Driven by shadowing `availWidth` to the
column width for the whole card region and floating the right column with
Indent() (a one-shot cursor set can't hold a column across line-advances);
each card's own responsive gates collapse their internal columns at the
narrower width. Collapses to one column below the breakpoint.
Fix the half-width overflows a parallel audit surfaced (cards previously only
ever rendered full-width):
- WALLET Tools & Actions: merge-to-address was a 3rd button on a 2-button row
(unconditional SameLine) — flip the separators so 2-per-row pairs cleanly.
- EXPLORER: wrap the Block Explorer button to its own row when the checkboxes
+ button won't fit (measured, locale-safe).
- NODE & SECURITY: wrap "Remove Encryption" below when the encrypted row's
three buttons + status don't fit the column.
- ABOUT: 2x2 button grid instead of 1x4 so labels don't clip.
- THEME: reserve the real gaps + custom-skin "*" marker in the theme combo
width so Refresh doesn't spill past the edge.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>