frontend: Implement Interactive Proof-of-Life Ping Widget and Dynamic Inactivity Countdown

[ONEONUORA]

Problem Description

The inheritance protocol requires asset owners to periodically submit a proof-of-life ping to prevent plans from entering the claimable/triggered state. While InactivityTimerCard.tsx displays static countdown data, it lacks an interactive wallet-signed "Send Proof-of-Life Ping" workflow.

Missing Functionality & Specs

• Add a "Send Ping" button to InactivityTimerCard.tsx and the main Asset Owner Dashboard.
• Generate an Ed25519 signature challenge (or Soroban ping contract call) signed by the asset owner's connected wallet via WalletContext.
• Post the signed ping to POST /api/plans/ping and/or invoke the smart contract's ping method.
• Dynamically recalculate and update the remaining inactivity countdown upon successful ping submission.

Affected Files

• frontend/components/plans/InactivityTimerCard.tsx
• frontend/app/asset-owner/page.tsx
• frontend/app/lib/api/inheritance.ts

[tecmalik]

please assign this issue to me i would love to work on it.

[Agbeleshe]

Hey, can I solve this? I intend to approach this by reviewing the existing flow and identifying the best integration points before implementing the required functionality. I'll also include tests and handle edge cases to deliver a robust solution.

[grantfox-oss]

🦊 GrantFox — @Agbeleshe 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 #1033)
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!

@Agbeleshe's PR #1052 was approved and merged by @ONEONUORA.

🏆 @Agbeleshe: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (249 total points). Track your full progress on GrantFox.

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