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Jason Lee c6a8731733 docs: add company filings commands and earnings analysis example to CLI docs (#364)
## Summary

- Add `filings` and `filing-detail` commands to the "Available
capabilities" section across all three locales (en, zh-CN, zh-HK)
- Add an earnings analysis example in the "AI integration" section
demonstrating a two-step workflow: use `filings` to discover filing IDs,
then `filing-detail` to pull full content for cross-company comparison
(TSLA vs NVDA Q4 2025)

## Test plan

- [ ] Verify the new "Company filings & announcements" section renders
correctly in all three locales
- [ ] Verify the earnings analysis example code block displays properly
- [ ] Check that table formatting renders correctly in the example
output

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-17 22:55:24 +08:00
..
2026-03-16 19:04:07 +08:00
2026-03-12 19:49:27 +08:00