Visual QA pass on light theme (trade_detail and other dense screens)

[ermeme]

Milestone: 8 — Product / security / a11y
Type: qa / ux
Priority: low

The theme supports both dark and light mode and the toggle is wired in Settings, but most screens were designed against the dark token palette. A manual pass is needed to verify contrast, badge legibility, chip backgrounds, and shimmer skeletons in light mode — especially on dense screens.

Suggested checklist

• trade_detail_screen.dart (status chips, action buttons, dispute view)
• home_screen.dart order cards (rating stars, country flag emoji, premium color)
• chat_room_screen.dart (bubbles, info panels)
• notifications_screen.dart (pinned backup card, badge colors)
• pay_lightning_invoice_screen.dart (QR contrast)

This is a visual / QA chore, not a feature.

[grunch]

Code verification (2026-07-16)

Valid: both themes exist and the toggle is wired (settings_provider.dart), default is ThemeMode.dark (line 21), and screens were designed against dark tokens. Low priority is right — QA chore. Two notes: (1) coordinate with #117 (a11y audit) — WCAG contrast checks there should run against both themes so this pass isn't duplicated; (2) the design system doc flags exactly this ("Verify the contrast of the Esperando factura pill in light mode if one is ever added") — the status pills are the known risk area, start there.