WHMCS Hetzner Datacenter 2.1

1. Automatic Pricing UI
   • Added bulk selection of currencies and billing periods with instant preview table.
   • Added Base price (Net/Gross) selector and percentage margin input.
   • Preview recalculates immediately when Base price or Percentage changes.
   • Added “Automatically apply price daily” toggle.
2. Data storage & compatibility
   • Improved merge logic to prevent overwriting other saved fields.
3. Bulk pricing logic (AJAX)
   • Automatically updates or creates missing tblpricing rows based on selected currencies and billing periods.
   • Applies Hetzner base price, margin, WHMCS currency rates, and period multipliers with rounding up to currency precision.
4. Daily Cron automation
   • Extended DailyCronJob to respect saved bulk pricing configuration.
   • Fetches fresh Hetzner base price once per run and applies to all selected currencies and periods.
   • Creates missing tblpricing rows and logs detailed status for each action.
5. Currency and rounding policy
   • Using Hetzner Cloud API currency (/pricing.currency) instead of hard-coded EUR.
   • Introduced rule: always round UP according to ISO-4217 minor units (0/2/3 decimals).
   • Unified logic: monthly price is rounded first, then multiplied by period factor and rounded again.
   • Both JS preview and server-side calculation now follow identical rounding logic.
6. Improved server selection UI
   • Expanded dropdown descriptions: name – architecture – cores – memory – disk.
7. Admin tools for stock management
   • Added “Clear and Reset” button in product configuration to restore stockcontrol and qty values.
8. Fixes and resilience
   • Fixed issues with potentially lost or overwritten settings.
   • Handled HTML-encoded inputs safely.