Malin f4c9e39493 feat: add structured file-based logging with admin log viewer
- New WooList_Logger class writes to wp-content/uploads/woolist-logs/woolist.log
  - INFO level: subscription events, test connection results (always recorded)
  - ERROR level: API failures, config problems (always recorded + php error_log fallback)
  - DEBUG level: full request URLs (password redacted), raw responses, step-by-step
    flow (only when "Enable debug logging" is checked in settings)
  - Auto-rotates at 1 MB; log directory protected by .htaccess
- API class: logs every request URL (redacted) and raw response body at DEBUG,
  errors at ERROR; subscribe_email_to_list logs each step (lookup/create/add)
- Hooks class: logs hook fire, skip reasons, and sync intent at DEBUG/INFO/ERROR
- Shortcode class: logs AJAX submissions, coupon generation, and failures
- Admin: new Logging section with "Enable debug logging" checkbox;
  log viewer textarea (last 300 lines, dark theme) + Clear Log button
  both visible at bottom of WooCommerce → Settings → phpList tab

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-02-19 16:25:33 +01:00
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