frontend: Replace LocalStorage Mock Store Fallbacks with Live Backend API Integration

[ONEONUORA]

Problem Description

The frontend relies heavily on frontend/lib/mockStore.ts to simulate plan creation, plan listing, and KYC status using browser localStorage. When connected to a live backend service, pages such as /asset-owner/plans, /asset-owner/plans/[planId], and /asset-owner/plans/claim should query the Axum backend API endpoints instead of reading from localStorage.

Missing Functionality & Specs

• Refactor useApiQuery and plan context providers to call /api/plans, /api/plans/{id}, and /api/kyc/status from the backend service.
• Provide proper fallback/demo toggles via environment variable (NEXT_PUBLIC_USE_MOCK_DATA=true/false).
• Implement robust error states, loading skeletons, and automatic data revalidation when connected to backend API endpoints.
• Ensure authentication headers (JWT or Ed25519 signature headers) are attached when fetching protected resources.

Affected Files

• frontend/lib/mockStore.ts
• frontend/hooks/useApiQuery.ts
• frontend/app/asset-owner/plans/page.tsx
• frontend/app/asset-owner/plans/[planId]/page.tsx

[JoyLight00]

Hi Maintainer
I will love to work on this
kindly assign me to it please
I am a developer with 4 years of experience

[grantfox-oss]

🦊 GrantFox — @JoyLight00 has been assigned to this issue as part of the Third Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #1032)
2. Your PR will be reviewed by the Fracverse maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@JoyLight00's PR #1049 was approved and merged by @ONEONUORA.

🏆 @JoyLight00: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (287 total points). Track your full progress on GrantFox.

👏 Great work, @JoyLight00! Keep contributing to Fracverse.