FE: Bounty wizard shell + step/draft machinery

[0xdevcollins]

Context

Part of the Bounty Configure (Host a Bounty) milestone. Adds the wizard orchestrator and the step + draft state machinery, mirroring the hackathon wizard. No AI assist (deferred).

Blueprint to mirror

• components/organization/hackathons/new/NewHackathonTab.tsx
• hooks/use-hackathon-steps.ts, hooks/use-hackathon-draft.ts

Tasks

• components/organization/bounties/new/constants.ts: StepKey = 'scope' | 'mode' | 'submission' | 'reward' | 'review', STEP_ORDER, StepData.
• components/organization/bounties/new/NewBountyTab.tsx: orchestrator wiring steps + draft + publish + step-save, the funding-confirmation / progress modals, funding-source selection (managed / external / treasury), and the USDC pre-flight balance check. Remove all AI entry points.
• hooks/use-bounty-steps.ts: URL ?step= navigation.
• hooks/use-bounty-draft.ts: lazy create then PATCH (ensureDraftId), resume via useDraft, transform API sections to form state.

Acceptance criteria

• Wizard navigates steps, autosaves sections, and resumes a draft by id.

Depends on

• Bounty data layer (features/bounties).

[linear]

BOU-253

[coderabbitai]

🔗 Related PRs

#503 - Feat/improved rewards tab [merged]
#505 - Feat/improved rewards tab [merged]

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[rayj6]

I would like to work on this bounty. Experience building wizard orchestrators in Next.js. From Scarlet Technology (scarlet-technology.com).

[Idrhas]

Hi, I'd like to work on this issue, I have experience with the relevant technologies and ecosystem and have previously contributed to similar issues. I’m comfortable working with the codebase and familiar with standard practices.

[Senorespecial]

I would love to work on this issue

[dorisadams]

I would love to work on this issue