Differentiate Active vs Resolved Errors in Contact Activity Timeline

Current Issue:

The "View Errors" button remains red and visible even after errors are resolved, creating unnecessary anxiety. Users can't distinguish between active errors requiring action and past errors that have been fixed.

Resolved Errors:

• Green "✓ Resolved" badge

• Strikethrough text styling

• Gray/neutral colors instead of red

• Dual timestamps showing error date + resolution date