Improve catalog table responsiveness

[saahithjanapati]

Summary

• replace invalid nested table headers in catalog tables with flex-wrapped external link buttons
• wrap each catalog table in a horizontally scrollable container with a sensible minimum width for smaller screens
• tune mobile styles so action buttons stack vertically and spacing adapts on narrow devices

Testing

• npm test -- --watch=false (fails: react-scripts unavailable due to restricted npm registry access)
• npm install (fails: registry access blocked for dev dependency netlify-cli)
• npm install --omit=dev (fails: registry rate limiting during install, retried without access to react-scripts package)
• npm install react-scripts (fails: registry access blocked for package)

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https://chatgpt.com/codex/tasks/task_e_68d54e7e1d2c8328b1b15617a367f8ba

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