[Bug][Kimi Desktop] Poor font kerning (letter spacing) for Cyrillic text in chat markdown

In the Kimi Desktop chat panel (Windows), Cyrillic text rendered in markdown blocks exhibits broken kerning: letters within words are spaced unevenly with anomalously large gaps, making the text look untidy and harder to read.

Expected behavior

Cyrillic text in markdown paragraphs and lists should render with even, consistent letter spacing (kerning), similar to Latin text or text shown in HTML widgets.

Why this matters

The broken kerning degrades readability of long agent responses, creates an impression of a sloppy UI, and makes structured information (lists, tables, specs) harder to scan.

Steps to reproduce

1. Open Kimi Desktop for Windows (observed on v3.x).
2. Start a conversation with any agent.
3. Receive a response containing Cyrillic text in markdown formatting (e.g., a bullet list or plain paragraph).
4. Observe the inter-letter spacing within words.

Actual behavior

Letters inside words have variable, abnormally large gaps. For example, the word "Проектные" renders as "П р о е к т н ы е", and "контекст" renders as "к о н т е к с т".

Screenshots / Evidence

Screenshot attached to this issue. It shows how plain markdown list text is displayed with words broken apart by extra spacing.

Environment

• Product: Kimi Desktop for Windows
• Version: 3.x (observed on 2026-07-23)
• OS: Windows 11
• Note: The issue is specific to markdown rendering in the chat panel; HTML widgets render correctly.

Start by reproducing the issue in the Kimi Desktop Windows chat panel with Cyrillic text in markdown paragraphs and lists, then compare it with Latin text and HTML widgets, which render correctly. Trace the markdown rendering path and verify that Cyrillic words display with even letter spacing and consistent kerning.