[Link reference] Add forced light/dark mode so they don't mix

[compulim]

Is it an issue related to Adaptive Cards?

No

Is this an accessibility issue?

No

What version of Web Chat are you using?

Development build

Which distribution are you using Web Chat from?

Unrelated

Which hosting environment does this issue primarily affect?

Web apps

Which browsers and platforms do the issue happened?

Others or unrelated

Which area does this issue affect?

Chat history

What is the public URL for the website?

No response

Please describe the bug

In dark mode, chat history appear as light but the link reference UI appear as dark.

Do you see any errors in console log?

No response

How to reproduce the issue?

1. Enable dark mode
2. Navigate to Web Chat loader
3. Click on sample, use the "Sample 2"
4. Load Web Chat

What do you expect?

Chat history should use a homogenous mode (either fully light or fully dark, but not mixed)

What actually happened?

Link reference is dark, while the message appears as light.

Do you have any screenshots or recordings to repro the issue?

Adaptive Card JSON

No response

Additional context

No response