Fix SEO meta descriptions across localized docs

[mintlify]

Summary

Audited all MDX files for SEO metadata quality and fixed 46 description frontmatter issues across Spanish, French, and Chinese localized docs:

• Spanish (es): Shortened 6 descriptions that exceeded 160 characters
• French (fr): Shortened 14 descriptions that exceeded 160 characters
• Chinese (zh): Expanded 25 descriptions that were under 50 characters, shortened 1 that exceeded 160 characters

All English pages already had compliant descriptions (50-160 chars). No page content was changed — only frontmatter description fields were updated.

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Note

Low Risk
Low risk because changes are limited to MDX frontmatter description text for SEO; no runtime logic or page body content is modified.

Overview
Updates SEO meta descriptions across localized docs. This PR edits only MDX frontmatter description fields in Spanish, French, and Chinese pages to improve clarity and keep descriptions within typical SEO length guidelines (shortening overly long ones and expanding overly short ones).

No page content, routing, or product behavior is changed—only metadata used for search/preview snippets.

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