The welcome 'Tip:' line hardcoded #b48cff (label) and #9ccfff (body)
with an additional \x1b[2m dim on the body, ignoring the active theme.
On any light theme this dropped the body to ~1.5:1 contrast on a white
background (WCAG AA needs >=4.5:1), making the line effectively
invisible. Switching between light variants did not help because the
colors were not theme-derived.
renderWelcomeTip in packages/coding-agent/src/modes/components/welcome.ts
now paints the label through theme.fg('customMessageLabel', ...) and the
body through theme.fg('muted', ...), drops the manual dim, and wraps the
whole line with theme.italic(...). Both tokens are tuned per theme, so
the line stays vivid on dark backgrounds and readable on light ones
(e.g. light theme's customMessageLabel #7e57c2 = 5.21:1 on white).
A regression test pins the contract: dark/light themes must produce
different bytes for the same tip, and no manual \x1b[2m may remain.
Fixes#3337
- Extracted `renderWelcomeTip` as a standalone exported function.
- Replaced truncation with `wrapTextWithAnsi` so long tips wrap under the label.
- Added test asserting multi-line output stays within box width without ellipsis.
roboomp