fix(dashboard): voting on uniswap governor with wrong output

[pikonha]

Note

Medium Risk
Touches on-chain governance vote submission for multiple DAOs, but the change is limited to simulation ABI/decoding and is covered by a new test.

Overview
Fixes "Failed to vote" on GovernorBravo-style governors (e.g. UNI, COMP, GTC, Nouns) where simulateContract ran before the wallet could open.

ozGovernorVoteHandler no longer uses the ENS/OZ governor JSON ABI for castVote / castVoteWithReason. It now uses a minimal GovernorCastVoteAbi with empty outputs, because Bravo governors return no returndata and viem was erroring when the ABI expected a uint256. Proposal IDs are passed as BigInt(params.proposalId) in those calls.

A unit test asserts Uniswap governor votes simulate with void-return castVote ABI and the expected args.

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Project	Deployment	Actions	Updated (UTC)
anticapture-storybook	Ready	Preview, Comment	Jul 10, 2026 8:41pm

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🎨 UI Review

Automated review · scope check only

This PR is a backend logic fix: it swaps the ABI used for castVote / castVoteWithReason on GovernorBravo-style DAOs (UNI, COMP, GTC, Nouns) in apps/dashboard/features/governance/utils/voteOnProposal.ts (a shared, ABI-only GovernorCastVoteAbi with empty outputs replaces the OZ/ENS governor ABI, and proposal IDs are now passed as BigInt), plus a matching unit test and a changeset. All 3 changed files are non-visual — no .tsx, no styles, no design-system files, no rendered UI surface.

The fix only changes how the vote transaction is simulated/submitted under the hood (fixing a simulateContract decoding error that was blocking the wallet from opening); the vote flow's UI (buttons, dialogs, toasts) is untouched by this diff.

Out of scope for a UI review; no findings to report.

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