frontend: Add modal for viewing user attestations per hunt on-chain

[Copilot]

Adds a modal to view Sign Protocol attestations for progress tracking (retries and successful clue solves) with links to the Sign Protocol explorer.

Changes

Backend

• New endpoint GET /team-attestations/:huntId/:teamIdentifier returns solve and retry attestations for a team
• Uses Promise.allSettled for parallel clue queries

Frontend

• AttestationsModal.tsx: Neobrutalism-styled modal displaying:
  • Hunt start attestation
  • Per-clue cards with solve details (solver, time taken, attempts) and retry history
  • Direct links to scan.sign.global/attestation/{id}
• Attestations button added to HuntDetails.tsx and HuntEnd.tsx card headers
• getTotalCluesFromStorage() utility added to progressUtils.ts

Usage

<AttestationsModal
  huntId={huntId}
  huntName={huntData?.name}
  teamIdentifier={teamIdentifier}
  totalClues={getTotalCluesFromStorage(huntId)}
  isOpen={isAttestationsOpen}
  onClose={() => setIsAttestationsOpen(false)}
/>

Screenshot

Note: Screenshot shows blank page due to missing Web3 environment configuration in sandbox. The modal renders when proper Web3 config is present.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>frontend: Add a modal for the user to view their attestations per hunt, on-chain</issue_title>
<issue_description>- We use sign protocol attestations heavily for progress tracking - both retries and successful clue solves.

• Since these can be viewed on the sign explorer (https://scan.sign.global/attestation/), we can provide links to those to the user to verify their attestations
• The modal can be similar to the Leaderboard.tsx with the retries and successful clue separately visible. We will show clue-wise, both retries and succcessful attempt attestation link, solverAddress, timeTaken (for solve clue), and timestamp for both. Need not be a table also, a list of cards with useful indicative icons is good. Keep the neobrutalism style intact.
• Add this button on the huntEnd, huntDetails page to show the modal.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes frontend: Add a modal for the user to view their attestations per hunt, on-chain #175

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[netlify]

✅ Deploy Preview for khoj-alpha ready!

Name	Link
🔨 Latest commit	57d9d32
🔍 Latest deploy log	https://app.netlify.com/projects/khoj-alpha/deploys/692759735bdb150008cea7ff
😎 Deploy Preview	https://deploy-preview-176--khoj-alpha.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.