Pre-submission Checklist

• I have searched the existing issues and this bug has not been reported yet
• I have tested this issue on the demo site or the latest version

Where did you encounter this bug?

Latest stable version (self-hosted)

Memos Version

v0.26.2

Bug Description

In dark mode(Dark/Midnight), inline code lacks the expected background color (font as expected)

Steps to Reproduce

Just enter inline code in Memos with Markdown syntax, such as `memos`

Expected Behavior

I expect it to be as visually distinct as the light themes (Light, Paper, and Whitewall).

Screenshots & Additional Context

Dark theme:

Midnight theme:

Light theme: Paper and Whitewall look good too.