fix: invalid fontWeight 'semi-bold' in SuccessMessage components

[talissoncosta]

Problem

Both SuccessMessage.tsx and SuccessMessage.js use fontWeight: 'semi-bold' — this is not a valid CSS value. The browser silently ignores it, so the "SUCCESS" title renders at normal weight instead of semi-bold.

Valid values are keywords (normal, bold) or numeric (100–900). The correct value for semi-bold is 600.

Files

• web/components/messages/SuccessMessage.tsx (line 44)
• web/components/SuccessMessage.js (line 28)

Fix

Replace 'semi-bold' with 600.

Context

Part of the design system audit (#6606) — QW-8.