feat(frontend): Build user profile and escrow reputation display

[KuchiMercy]

Description

Users have no profile page. Create a profile page with reputation metrics, transaction statistics, and customizable display name.

Acceptance Criteria

• /profile route for authenticated users
• Display: wallet address (copy button), display name (editable), member since, role badge
• Stats: total escrows created/participated, completed count, success rate, total volume, average amount
• Trust score: success rate (40%), dispute rate inverse (30%), account age (15%), volume (15%)
• Visual badge: Bronze/Silver/Gold/Platinum
• Recent escrow history (last 5) with status badges
• Dispute history count (visible to user and admins only)
• Editable display name via inline edit
• Profile link from navigation bar
• Counterparty profile link on escrow detail pages
• Responsive: card on mobile, two-column on desktop
• Loading skeleton

Points: 150

[mijinummi]

@mijinummi has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello maintainers I'm a full stack developer experience in building scalable systems I can handle this perfectly.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @mijinummi to this issue.

[drips-wave]

Congratulations, @mijinummi! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @mijinummi: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊