add-expert（添加专家）

Steps

1. Add the expert's photo to both: The image should be a square headshot (PNG format). Both paths must have the same file.

- packages/docs/static/img/freelancers/<firstname>.png - packages/promo-pages/public/img/freelancers/<firstname>.png

1. Add an entry to the experts array in packages/promo-pages/src/components/experts/experts-data.tsx: {slug: 'firstname-lastname', name: 'First Last', image: '/img/freelancers/<firstname>.png', website: 'https://example.com' | null, x: 'twitter_handle' | null, github: 'github_username' | null, linkedin: 'in/linkedin-slug/' | null, email: 'email@example.com' | null, videocall: 'https://cal.com/...' | null, since: new Date('YYYY-MM-DD').getTime(), description: (<div> A short description of the expert's work and specialties. Links to projects can be included with <a> tags. </div>),},

- since should be set to today's date - slug must be lowercase, hyphenated version of the name - Set unused social fields to null - The entry goes at the end of the experts array (before the closing ])

1. Render the expert card by running in packages/docs: bun render-cards This generates packages/docs/static/generated/experts-<slug>.png. Verify it says "Rendered experts-<slug>" (not "Existed").