feat(feishu): use interactive card messages for markdown rendering#21000

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Only-Code-A wants to merge 2 commits intoNousResearch:mainfrom

Only-Code-A:feat/feishu-interactive-card-markdown

Commits on May 7, 2026

feat(feishu): upgrade card messages to Card JSON 2.0 for full markdown support
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test(feishu): update tests to expect interactive card msg_type
Only-Code-A
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