fix(DATAGO-130242): align card hover state to design system

[jessieli-ux]

Summary

• Removed background color change on card hover to align with design system
• Cards now only show elevated box shadow on hover without background color change

Changes

• Removed hover:bg-(--primary-w10) from Card component

Test plan

• Hover over selectable cards and verify only box shadow increases
• Verify no background color change occurs on hover
• Test in both light and dark themes

🤖 Generated with Claude Code

[github-actions]

✅ FOSSA Guard: Licensing (SolaceLabs_solace-agent-mesh) • PASSED

Compared against main (4a355dab7572521050d2f26f9dae2b267ccddcbf) • 0 new, 6 total (6 in base)

Scan Report | View Details in FOSSA

[github-actions]

✅ FOSSA Guard: Vulnerability (SolaceLabs_solace-agent-mesh) • PASSED

Compared against main (4a355dab7572521050d2f26f9dae2b267ccddcbf) • 0 new, 3 total (3 in base)

Scan Report | View Details in FOSSA

[github-actions]

WhiteSource Policy Violation Summary

✅︎ No Blocking Whitesource Policy Violations found in solaceai/solace-agent-mesh-ui-pr-1283!

[sonarqube-solacecloud]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube