add creator key bundle management page

[aishagbadamosi]

• Add a creator bundle management page at /creator/:id/bundles (with a /creators/:id/bundles alias), linked from the creator dashboard.
• Create form: select creator keys with quantities, set a discounted bundle price, and choose an expiry (1–90 days, default The price is validated against a 20% price floor — bundle price must be at least 80% of list price and strictly below it. Submission sends a create_bundle contract call.
• Active bundles: shows purchase counts and a live countdown per bundle. Cancelling submits cancel_bundle, optimistically stamping cancelledAt so the bundle leaves the active list immediately, with rollback on failure and a query invalidation on settle.
• Archive: expired and cancelled bundles move here automatically, derived from a single shared ticking clock rather than a separate expiry task.
• Add bundle.service.ts for the bundle types and paginated listing, plus bundle.utils.ts for pricing, validation, status, and partition helpers.
• Expose submitCreatorContractCall from useCreatorContractActions so bundle hooks submit calls through the same seam as existing creator mutations. On-chain wiring is still simulated, as it is elsewhere in this file, so create_bundle/cancel_bundle do not hit the network yet.
• List bundles via a cursor-paginated GET /creators/:creatorId/bundles; the endpoint shape is assumed pending a backend contract.

closes #984

Summary

• Add a creator bundle management page at /creator/:id/bundles (with a /creators/:id/bundles alias), linked from the creator dashboard.
• Create form: select creator keys with quantities, set a discounted bundle price, and choose an expiry (1–90 days, default The price is validated against a 20% price floor — bundle price must be at least 80% of list price and strictly below it. Submission sends a create_bundle contract call.

closes #984

Testing

• pnpm lint
• pnpm build

Checklist

• Linked issue or backlog item
• Scope is limited to the stated change
• Updated docs if behavior or setup changed
• Added screenshots for UI changes when relevant

[drips-wave]

@aishagbadamosi Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits