fix: implement environment-based API proxy for cross-domain authentic…

[daveaugustus]

…ation

• Add Next.js rewrites to proxy /api/v1/* and /api/v2/* requests
• Read API URLs from environment variables (NEXT_PUBLIC_API_URL*)
• Resolve cross-domain cookie authentication issues
• Enable proper session management and Create button visibility
• No hardcoded URLs for security compliance

📃 Why Merge This PR?

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🛠️ Issue Fixed

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🔍 PR Type

• [ ] 💡 Feature
• [ ] 🐛 Bug Fix
• [ ] 📃 Documentation
• [ ] 🎨 UI Improvements
• [ ] 💻 Code Refactor
• [ ] ✅ Tests

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