Aaron D. Lee 01afb3da66 Refactor: Extract banner template to shared banner.sh ...

- Create rpi/banner.sh with print_banner, print_gradient_line,
  print_logo, print_starfield, print_complete_banner functions
- Update setup.sh to source banner.sh (with inline fallback for curl)
- Update first-boot-wizard.sh to use banner functions
- Update sanitize-for-image.sh to use banner functions
- Fix MOTD thermometer spacing alignment

Single source of truth for ASCII banner styling.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-06 22:33:12 -05:00

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