Implement API Service Layer with Real Backend Integration

[KuchiMercy]

Complexity: High (200 points)

Description

Replace mock EscrowService with real API integration including authentication, error handling, and request interceptors.

Requirements and Context

Current service uses mock data
Need real API calls to NestJS backend
Must handle JWT authentication
Should implement request/response interceptors

Suggested Execution

Create api/client.ts with axios instance and interceptors
Create api/auth.ts for authentication endpoints
Update services/escrow.ts to use real API
Add JWT token management in requests
Implement refresh token flow

Test and Commit

Test API client configuration
Test authentication flow
Verify error handling works correctly

Example Commit Message

feat(frontend): implement real API service layer with authentication

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[Mackenzie-OO7]

@Mackenzie-OO7 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Hi! I would like to work on this issue. I’m a full stack blockchain developer with over 5 years of experience, an active contributor to Stellar for 2+ years and have built multiple projects on Stellar as well. I believe I’ll be able to handle this efficiently.

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[Divineifed1]

@Divineifed1 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Hello Maintainer
Can I tackle this task

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Congratulations, @Divineifed1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

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