feat: export DevCard as PDF for printing and email signatures

[Nareshkumawat-star]

Feature Request

Users want to print their DevCard or attach it to email signatures. Currently there is no PDF export option.

Proposed Solution

• Add "Export as PDF" button on the card profile page
• Generate a print-optimized PDF using puppeteer (backend) or react-pdf (client-side)
• Standard business card sizes: 3.5 x 2 inches (US) and 85 x 55 mm (EU)
• Include QR code, name, title, social links, and profile photo
• Option to download as "DevCard_YourName.pdf"

Affected Platforms

• Web
• Mobile (share sheet to PDF)

[github-actions]

Hi @Nareshkumawat-star,

Thanks for opening this issue.

Please reply with one of the following areas so the issue can be routed to the appropriate team member:

- /backend
- /web
- /mobile
- /devops

Once an area is selected, the corresponding label will be added automatically.

[Nareshkumawat-star]

/web

[github-actions]

The issue has been classified as web.

@ShantKhatri, please review and triage this issue when available.

The web label has been applied and the issue has been routed accordingly.