Prevent iOS autozoom on inputs

[MathijsR94]

Summary

• Fix iOS Safari auto-zoom on input focus by changing input font size from 14px (text-sm) to 16px (text-base)
• Add preview:tunnel script for testing on mobile devices via localtunnel

Problem

iOS Safari automatically zooms in when a user taps an input field with a font size smaller than 16px. This causes a jarring zoom effect and requires users to manually pinch-to-zoom back out.

Reproduction steps

1. Run bun run preview:tunnel to build and start a tunneled preview server
2. Open the localtunnel URL on your iOS device (URL in terminal)
3. On the localtunnel landing page, copy the IP shown at the top and paste it into the input field to proceed
4. Before fix: tapping any input field (username, PAT, date pickers) zooms the viewport
5. After fix: the viewport stays at its current zoom level

Changes

• Updated inputClass in three files from text-sm (14px) to text-base (16px):
  • src/components/AuthSection.tsx
  • src/components/DatePresets.tsx
  • src/components/SettingsDrawer.tsx
• Added preview:tunnel script to package.json for mobile testing
• Addes preview.allowedHosts to vite.config.ts to allow local testing

Test plan

• Verify inputs no longer trigger auto-zoom on iOS Safari
• Verify input styling still looks correct on desktop
• Verify bun run preview:tunnel works end-to-end