feat: rework admin portal with pricing breakdown and document management

- Added pricing snapshot columns to the leads table: daily_subtotal, weekend_subtotal, subtotal_eur, vat_eur, total_eur, deposit_eur, total_days, weekday_count, weekend_day_count.
- Updated create_lead RPC to accept and store new pricing parameters.
- Enhanced frontend app.js to compute and send pricing details during lead creation.
- Introduced new UI elements in admin.html for displaying pricing and documents in a tabbed dialog.
- Updated i18n.js with new translation keys for pricing and document management.
- Improved styles in styles.css for new dialog components and pricing cards.
- Added migration script 06-admin-pricing-documents.sql for database schema changes.

frontend/i18n.js

@@ -170,6 +170,50 @@ export const translations = {
         adminPeriod: "Zeitraum",
         adminKaution: "Kaution (€)",
         adminMaxKmWeekend: "Max. km/Wochenendtag",
+        adminTotalPrice: "Gesamtbetrag",
+        adminLifetimeValueCol: "Gesamtwert",
+        adminTabGeneral: "Allgemein",
+        adminTabGeneralEn: "General",
+        adminTabPricing: "Preise",
+        adminTabPricingEn: "Pricing",
+        adminTabDocuments: "Dokumente",
+        adminTabDocumentsEn: "Documents",
+        adminTabNotes: "Notiz",
+        adminTabNotesEn: "Notes",
+        adminTabOrderHistory: "Order History",
+        adminLifetimeValue: "Gesamtwert aller Buchungen",
+        adminLifetimeValueEn: "Lifetime value",
+        adminDownload: "Download",
+        adminNoDocuments: "Keine Dokumente hochgeladen",
+        adminNoDocumentsEn: "No documents uploaded",
+        adminIdDoc: "Ausweis / Führerschein",
+        adminIdDocEn: "ID / Driving license",
+        adminIncomeDoc: "Lohnzettel",
+        adminIncomeDocEn: "Pay slip",
+        adminOtherDoc: "Sonstiges",
+        adminOtherDocEn: "Other",
+        adminWeekdays: "Wochentage",
+        adminWeekdaysEn: "Weekdays",
+        adminWeekendRateLabel: "Wochenendmiete",
+        adminWeekendRateLabelEn: "Weekend rate",
+        adminSubtotalLabel: "Zwischensumme",
+        adminSubtotalLabelEn: "Subtotal",
+        adminVatLabel: "MwSt. (20%)",
+        adminVatLabelEn: "VAT (20%)",
+        adminTotalLabel: "Gesamtbetrag",
+        adminTotalLabelEn: "Total",
+        adminDepositLabel: "Kaution",
+        adminDepositLabelEn: "Deposit",
+        adminIncludedKmLabel: "Inkl. km",
+        adminIncludedKmLabelEn: "Included km",
+        adminTotalDaysLabel: "Tage gesamt",
+        adminTotalDaysLabelEn: "Total days",
+        adminFirstContacted: "Erster Kontakt",
+        adminFirstContactedEn: "First contacted",
+        adminNote: "Notiz",
+        adminNoteEn: "Note",
+        adminSave: "Speichern",
+        adminSaveEn: "Save",
     },
     en: {
         navCars: "Fleet",
@@ -341,6 +385,50 @@ export const translations = {
         adminPeriod: "Period",
         adminKaution: "Deposit (€)",
         adminMaxKmWeekend: "Max. km/weekend day",
+        adminTotalPrice: "Total",
+        adminLifetimeValueCol: "Lifetime",
+        adminTabGeneral: "General",
+        adminTabGeneralEn: "Allgemein",
+        adminTabPricing: "Pricing",
+        adminTabPricingEn: "Preise",
+        adminTabDocuments: "Documents",
+        adminTabDocumentsEn: "Dokumente",
+        adminTabNotes: "Notes",
+        adminTabNotesEn: "Notiz",
+        adminTabOrderHistory: "Order History",
+        adminLifetimeValue: "Lifetime value",
+        adminLifetimeValueEn: "Gesamtwert aller Buchungen",
+        adminDownload: "Download",
+        adminNoDocuments: "No documents uploaded",
+        adminNoDocumentsEn: "Keine Dokumente hochgeladen",
+        adminIdDoc: "ID / Driving license",
+        adminIdDocEn: "Ausweis / Führerschein",
+        adminIncomeDoc: "Pay slip",
+        adminIncomeDocEn: "Lohnzettel",
+        adminOtherDoc: "Other",
+        adminOtherDocEn: "Sonstiges",
+        adminWeekdays: "Weekdays",
+        adminWeekdaysEn: "Wochentage",
+        adminWeekendRateLabel: "Weekend rate",
+        adminWeekendRateLabelEn: "Wochenendmiete",
+        adminSubtotalLabel: "Subtotal",
+        adminSubtotalLabelEn: "Zwischensumme",
+        adminVatLabel: "VAT (20%)",
+        adminVatLabelEn: "MwSt. (20%)",
+        adminTotalLabel: "Total",
+        adminTotalLabelEn: "Gesamtbetrag",
+        adminDepositLabel: "Deposit",
+        adminDepositLabelEn: "Kaution",
+        adminIncludedKmLabel: "Included km",
+        adminIncludedKmLabelEn: "Inkl. km",
+        adminTotalDaysLabel: "Total days",
+        adminTotalDaysLabelEn: "Tage gesamt",
+        adminFirstContacted: "First contacted",
+        adminFirstContactedEn: "Erster Kontakt",
+        adminNote: "Note",
+        adminNoteEn: "Notiz",
+        adminSave: "Save",
+        adminSaveEn: "Speichern",
     },
 };