[Bug] Native chat markdown: text after "——" is truncated; long lines/table cells don't wrap

Environment

• Windows Hub: v2026.7.1-4 (stable, x64)
• OS: Windows 10 LTSC 21H2 (build 19044.2311), zh-CN locale
• Gateway: OpenClaw 2026.8.2 on WSL2
• Chat content: Chinese (CJK), markdown-formatted agent replies

Bug 1 — text truncated after certain markdown constructs

Agent replies containing the CJK em-dash —— lose everything after it in the native chat window.

Repro: an agent reply containing 快速视图——在聊天框试试，如果没反应告诉我 renders only 快速视图 in Hub chat. The same message renders fully in the web Control UI, so the content is intact server-side — this looks like a native renderer issue.

Bug 2 — long lines don't wrap

Long single-line text (especially inside markdown table cells) does not wrap to the window width in the native chat window; lines appear cut off. The same content wraps correctly in the web Control UI.

Expected: native chat renders markdown at parity with the web Control UI.
Actual: truncation after ——; no wrapping of long lines/table cells.

No file or test is named; start by locating the native chat markdown renderer and comparing its handling with the web Control UI. Reproduce the CJK em-dash truncation and long-line/table-cell cases, then verify that native rendering preserves all text and wraps long content like the web UI.