docs: fix markdown table formatting

[chensid]

Summary

• Fix MD060 (table column style) lint errors in AGENTS.md by adding proper spacing around table separator pipes

Test plan

• markdownlint errors reduced from 51 to 10 (remaining are MD013 line-length, expected for Chinese docs with tables)

🤖 Generated with Claude Code

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Note

^{Cursor Bugbot is generating a summary for commit 8dd4e1e. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (1149591) to head (8dd4e1e).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #290   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            9         9           
  Lines          392       392           
  Branches        76        76           
=========================================
  Hits           392       392           

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