Feat/backup recovery v2

[DonaldXoftDev]

What

Integrates the new Backup and Recovery functionality and comprehensively resolves upstream TypeScript errors, Next.js 16 linting bugs, and merge conflicts.

Closes #105

Why

Ensures that the primary codebase builds cleanly on Vercel/GitHub Actions, while delivering the core backup and restore features requested by the ecosystem.

How

• Backup/Recovery Features: Added wallet recovery mechanisms, snippet export functionality, and enhanced activity logging.
• Type Safety & CI Fixes:
  • Patched Next 15 Dynamic Route parameters (params as Promise) across all snippet API routes.
  • Resolved generic and syntax typing errors in VerificationService, auth-middleware.ts, and WalletConnect.tsx.
  • Re-aligned catch-block typings in lib/db.ts to match the repository's internal style guidelines.
• Dependencies:
  • Updated jest.config.mjs to map paths natively with ts-jest for smoother builds.
  • Migrated ESLint to a modern flat config eslint.config.mjs to bypass deprecated next lint commands in Next.js 16.

Testing

• TypeScript: tsc perfectly clean (0 errors)
• ESLint: eslint . perfectly clean (0 errors)
• Merge conflicts successfully resolved locally

[vercel]

@DonaldXoftDev is attempting to deploy a commit to the Sudipta 's projects Team on Vercel.

A member of the Team first needs to authorize it.

[DonaldXoftDev]

Hi. maintainer, approve review my PR...