feat: implement Public Audit Portal & Interactive Verification HUD (#154)

[nivaslinga2]

📝 PR Description

This PR implements the Public Audit Portal & Interactive Verification HUD for ReGenX and closes #154.

✅ What’s added

• Added a clean lookup/search flow for transaction ID / intake ID in v-audit-portal.
• Built a glassmorphic audit results panel with batch metadata and verification status.
• Implemented an interactive audit timeline showing the waste journey from provider registration → rider pickup → plant processing → final verification.
• Added downloadable QR code generation for public verification.
• Improved state handling for:
  • valid verification results
  • no-result / invalid ID cases
  • loading and transition states
• Kept the implementation aligned with the existing ReGenX UI and trust/transparency workflow.

🎯 Why this matters

This feature strengthens the public trust layer of ReGenX by making waste-batch verification:

• visible
• traceable
• shareable
• easier to validate for ESG / audit use cases

🔗 Issue

Closes #154

🎯 GSSoC Points Target

• Difficulty: level:critical
• Quality: quality:exceptional
• Labels Requested: gssoc:approved, level:critical, quality:exceptional

💎 Quality Checklist

• Aesthetics: Glassmorphism and premium UI styling applied.
• Animations: Smooth micro-interactions / transitions added.
• Responsiveness: UI tested for responsive behavior.
• Code Quality: Clean structure, readable naming, and JSDoc added where needed.
• Console Health: No intentional console errors introduced.

📸 Screenshots / Video

🧪 Testing Done

• Tested transaction/intake ID lookup flow.
• Verified correct rendering of audit timeline states.
• Tested QR code generation and download flow.
• Checked invalid / unknown ID handling.
• Verified responsive layout and UI consistency with the existing dashboard.

[nivaslinga2]

Hi @Shruti070107 , I’ve completed the implementation for this issue and submitted the PR linked to #154. Please review it when possible.