## Context Remove TimeCurve launchpad sale-end, redemption, presale, and LP seed flows. Parent epic: #238. ## Relevant files - `contracts/src/TimeCurve.sol` — `endSale`, `redeemCharms`, `distributePrizes`, `LinearCharmPrice`, `MAX_SALE_ELAPSED_SEC`, presale hooks - `contracts/src/pricing/LinearCharmPrice.sol` - `contracts/src/vesting/DoubPresaleVesting.sol`, `PresaleCharmBeneficiaryRegistry.sol` - `contracts/src/sinks/DoubLPIncentives.sol` - `frontend/src/pages/timecurve/TimeCurveStakeAtLaunchSection.tsx` - `frontend/src/pages/PresaleVestingPage.tsx` or `/vesting` route - `docs/operations/final-signoff-and-value-movement.md` ## Acceptance criteria - [ ] No `saleEnded` / `redeemCharms` / `distributePrizes` / linear price schedule in v2 - [ ] Presale vesting pages and env vars removed - [ ] LaunchGate/home launchpad copy replaced with arena entry (`frontend/src/lib/surfaceContent.ts`) ## Verification checklist - [ ] Grep clean for `redeemCharms`, `endSale`, `LinearCharmPrice`, `launchLiquidityAnchor` - [ ] No `/vesting` route in production build