FE: Bounty marketplace (discover/list) in v1

[0xdevcollins]

Context

Part of the Bounty Builder Lifecycle milestone (v1 boundless). v1 has no bounty discover surface (v2 has its own marketplace). Build a public bounty marketplace mirroring the hackathon browse.

Blueprint to mirror

• components/hackathons/HackathonsPage.tsx, HackathonsFiltersHeader.tsx, components/landing-page/hackathon/HackathonCard.tsx
• route app/(landing)/hackathons/page.tsx

Tasks

• Route app/(landing)/bounties/page.tsx + a BountiesPage list: filters (status, mode, category, search) + pagination/infinite scroll.
• BountyCard: reward, mode badge (plain labels: single claim / competition / application), deadline, organization.
• Wire to GET /api/bounties via the bounties data-layer hooks.

Acceptance criteria

• Browse / filter / search bounties; cards link to the detail page.

Depends on

• Bounty data layer (sibling issue).

[linear]

BOU-271

[coderabbitai]

🔗 Related PRs

#376 - Fix hackathon [merged]

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[Rachaelisa]

/claim #622

I'll handle this. Reviewing the codebase and will post a PR soon.