feat: show individual approver addresses in ApprovalBar tooltip

[Yash-Karakoti]

Summary

This PR resolves the issue where the ApprovalBar component rendered individual owner approval slots as colored dots without providing any visual feedback on who signed off.

We added a parallelized on-chain check helper to fetch specific approvers for a proposal, updated the proposal hook data lifecycle, extended the core types, and attached a truncated address tooltip directly to the native HTML title attributes of the approved slots.

Key Changes:

• frontend/src/types/accord.ts: Added approverAddresses: string[] to the Proposal type to carry on-chain signer identities.
• frontend/src/lib/contract.ts:
  • Added an exported async function getApprovers(proposalId) that parallelizes calls to hasApproved across all multisig owners.
  • Initialized approverAddresses: [] within the mapProposal transformer to satisfy strict compiler typing.
• frontend/src/hooks/useContract.ts: Updated the mapping pipeline to resolve and bind the on-chain approverAddresses for each proposal inside the core state fetching loop.
• frontend/src/components/ApprovalBar.tsx: Updated the component to take an optional approverAddresses string array prop and added a truncated tooltip format (e.g., 0x1234...abcd) mapping to the native title attribute for active approval slots.
• frontend/src/components/ProposalCard.tsx: Passed proposal.approverAddresses through to ApprovalBar.
• frontend/src/pages/ProposalDetailPage.tsx & frontend/src/App.tsx: Cleaned up residual syntax/merge-conflict dead code causing compiler noise during npm run build.

Type of Change

• Bug fix
• New feature
• Documentation
• Refactor

Related Issue

Closes #2

Testing Checklist

• Existing tests pass locally
• New tests added to cover this change (where applicable)
• Manually verified the change works as expected
• Lint / type checks pass

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