fix: complete handleCopyReport refactoring and resolve syntax error

[Kritika200520]

Description

This PR fixes a fatal syntax error in src/components/common/ErrorBoundary.jsx that was preventing the application from compiling/building.

Fixes #3250

Motivation & Context

During an incomplete refactoring of handleCopyReport from a Promise chain to async/await, the function was left incomplete (missing the diagnostic report generation, clipboard write text operation, closing catches, and closing braces). This resulted in dangling syntax inside the class.

Key Changes

• Resolved the syntax/parsing error by completing the async/await implementation of handleCopyReport.
• Utilized the existing buildDiagnosticReport(errorId, error, errorInfo) helper to generate the report.
• Implemented robust clipboard writing with await navigator.clipboard.writeText(report) and a safe fallback to open a text blob in a new tab if clipboard access is denied.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• My changes generate no new warnings

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Quality Gate Profile: Clean Code Collective
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