Implement Dispute Filing Modal

[KuchiMercy]

Complexity: High (200 points)

Description

Create modal for filing disputes with reason selection, description, and evidence submission.

Requirements and Context

"Raise Dispute" button exists but has no implementation
Users need to provide dispute reason and evidence
Must support file/link attachments for evidence
Should explain dispute process to users

Suggested Execution

Create FileDisputeModal.tsx in apps/frontend/components/escrow/modals/
Add dispute reason dropdown (delivery issue, quality, etc.)
Add description textarea and evidence upload
Show dispute process explanation
Integrate with dispute API endpoint

Test and Commit

Test form validation
Test file upload handling
Verify API integration works correctly

Example Commit Message

feat(frontend): add dispute filing modal with evidence submission

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[Divineifed1]

@Divineifed1 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

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Can I work on this?

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Congratulations, @Divineifed1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

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