feat: add horizontal scroll to SimpleTable for mobile

[kevwilliams]

Context

Part of datum-cloud/enhancements#688 — Mobile Improvements in Staff Portal.

SimpleTable wraps its <Table> in overflow-hidden with no scroll container. On mobile, tables with 3+ columns overflow and clip rather than scroll.

Proposed Change

Wrap the <Table> in an overflow-x-auto div inside the border/rounded container in app/components/simple-table/index.tsx. The actions sticky column (sticky right-0 z-10) is already prepared for this pattern.

Files to Change

• app/components/simple-table/index.tsx — add inner overflow-x-auto wrapper

Affected Feature Lists

All components rendering SimpleTable:

• app/features/activity/components/activity-list.tsx
• app/features/contact/components/contact-list.tsx
• app/features/email/components/email-list.tsx
• app/features/quota/components/quota-grant-list.tsx
• app/features/quota/components/quota-bucket-list.tsx