poor color contrast of hyperlinks in a light-mode chat

[aharvard]

Describe the bug

The color contrast of hyperlinks in a light-mode chat is very low—dark text on a dark speech bubble.
However, it's fine in dark mode.

To Reproduce
Steps to reproduce the behavior:

1. Open a Goose chat
2. Paste the following: tell me about https://squareup.com/us/en
3. Note in light mode that the hyperlink is not easily readable
4. Note in dark mode that the hyperlink is readable

Expected behavior
When Goose UI is in light mode, hyperlinks should be readable.

Screenshots

Light	Dark

Please provide following information:

• OS & Arch: Sequoia 15.3.1 Apple M2 Max
• Interface: UI
• Version: Version 1.0.15-block.202503190039-808b0
• Extensions enabled: Developer, Computer Controller, Memory, Google Drive, contentful-mcp, and a couple of custom local MCPs
• Provider & Model: Anthropic claude-3.5-sonnet