feat: show individual approver weights in ApprovalBar tooltip (#394)

[Peolite1]

Summary

This PR updates the ApprovalBar tooltip to show each approver's individual weight contribution alongside their truncated address (e.g., "GABC...1234 · weight 5"). Since owners in weighted governance can have varying voting weights, this change makes it clear exactly how much voting power each approval contributes toward the quorum.

To support this:

• Added getApproverWeight to contract.ts to fetch individual weights safely.
• Updated useContract.ts to query and attach the approver weights alongside the proposal's approverAddresses.
• Passed the approverWeights down through ProposalCard and ProposalDetailPage to ApprovalBar.
• Updated ApprovalBar to restore the dot layout and display both the address and weight in the native hover tooltip.

Type of Change

• Bug fix
• New feature
• Documentation
• Refactor

Related Issue

Closes #394

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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