The dashboard screenshot uses a relative path `src="whatsapp-openclaw.jpg"`
which resolves correctly on the English root page but produces 404 on
zh-CN and ja-JP pages because Mintlify prepends the language subdirectory
to the CDN path.
Change to absolute path `/whatsapp-openclaw.jpg` in all three index files,
consistent with other images on the same page that already use absolute
paths (e.g. `/assets/openclaw-logo-text-dark.png`).
What:
- add zh-CN versions of landing revamp pages (features, quickstart, docs directory, network model, credits)
- refresh zh-CN index and hubs, plus glossary entries
Why:
- keep Chinese docs aligned with the new English landing experience
- ensure navigation surfaces the new entry points
Tests:
- pnpm build && pnpm check && pnpm test
