feat(billing): manual cadence + fix admin date inputs ignoring date-format setting

Manual billing cadence
  Adds a "Manual (trigger only)" cadence alongside monthly/quarterly. It reuses
  the monthly draft accumulator — invoices and billed hours pile onto one running
  draft — but stores NULL monthly_period_start/end so the scheduler's auto-flush
  never matches. The draft ships only when an admin clicks "Trigger invoice now".
  No migration: billing_cadence is a free-form string column gated by validators.
  - adminCustomers.js: allow 'manual' in billing_cadence validator
  - invoiceService.js: route manual through accumulator; NULL periods + placeholder
    issue/due date in getOrCreateMonthlyDraft
  - customerHoursService.js: manual auto-appends hours to running draft;
    billUnbilledEntries refuses manual (CADENCE_MISMATCH)
  - CustomerDetailPage.tsx: dropdown option, cycle-day hidden for manual,
    NULL-period-safe draft preview + trigger button, manual-specific copy
  - customerAdmin.service.ts: cadence union + nullable periodStart/periodEnd
  - en.json / de.json: manual, triggerConfirmManual, triggerHintManual,
    draftPreview.titleManual
Date-format fixes
  Replace raw <input type="date"> (browser-locale) with LocalizedDateInput so
  these admin surfaces honor the general_date_format setting:
  - ContractEditorPage.tsx (issue / valid-until / event dates)
  - QuoteEditorPage.tsx (event / valid-until dates)
  - EventDetailsPage.tsx (expiry date)
  - HoursSection.tsx (entry date)

backend/src/routes/adminCustomers.js

@@ -395,7 +395,7 @@ router.put('/:id', [
   // generated invoice to billing_cycle_day of the next period.
   // Cycle day spans -15..-1 (days before month end) and 1..28
   // (day of month) per migration 128 + service-layer clamp.
-  body('billing_cadence').optional().isIn(['per_event', 'monthly', 'quarterly']),
+  body('billing_cadence').optional().isIn(['per_event', 'monthly', 'quarterly', 'manual']),
   body('billing_cycle_day').optional().isInt({ min: -15, max: 28 })
     .withMessage('billing_cycle_day must be -15..-1 (days before month end) or 1..28 (day of month)'),
   // Per-customer Skonto opt-out (migration 112).

backend/src/services/customerHoursService.js

@@ -202,8 +202,10 @@ async function createEntry(customerId, payload, adminId) {
     const inserted = await trx('customer_hour_entries').insert(row).returning('id');
     const entryId = typeof inserted[0] === 'object' ? inserted[0].id : inserted[0];
 
-    // Monthly-mode customers get the auto-append treatment.
-    if (customer.billing_cadence === 'monthly') {
+    // Accumulator-mode customers (monthly + manual) get the auto-append
+    // treatment — the entry lands on the running draft instead of staying
+    // unbilled. Manual differs only in that its draft never auto-flushes.
+    if (customer.billing_cadence === 'monthly' || customer.billing_cadence === 'manual') {
       const fullEntry = { ...row, id: entryId };
       const rate = resolveEffectiveRate(fullEntry, customer);
       const lineItem = buildLineItemFromEntry(fullEntry, rate);
@@ -387,15 +389,16 @@ async function deleteEntry(entryId, adminId) {
 /**
  * Per-event flow: mint a standalone invoice from all unbilled entries
  * for this customer, one line per entry. Refuses when the customer is
- * monthly-mode (those entries auto-billed on save, so there should be
- * no unbilled rows). Returns the new invoice id.
+ * in an accumulator mode (monthly / manual) — those entries auto-billed
+ * onto the running draft on save, so there should be no unbilled rows.
+ * Returns the new invoice id.
  */
 async function billUnbilledEntries(customerId, adminId) {
   const customer = await db('customer_accounts').where({ id: customerId }).first();
   if (!customer) throw new AppError('Customer not found', 404);
-  if (customer.billing_cadence === 'monthly') {
+  if (customer.billing_cadence === 'monthly' || customer.billing_cadence === 'manual') {
     throw new AppError(
-      'Monthly-mode customers auto-append entries to the running draft; "Bill these hours" is for per-event customers.',
+      'Accumulator-mode customers (monthly / manual) auto-append entries to the running draft; "Bill these hours" is for per-event customers.',
       409,
       'CADENCE_MISMATCH',
     );

backend/src/services/invoiceService.js

@@ -293,6 +293,13 @@ async function getOrCreateMonthlyDraft(customer, adminId, trx) {
   const today = new Date();
   today.setHours(0, 0, 0, 0);
 
+  // Manual cadence has no billing cycle: the draft accumulates
+  // indefinitely and ships ONLY via the admin "Trigger invoice now"
+  // gesture, so it carries NO period_end. The scheduler's auto-flush
+  // filter is `monthly_period_end <= today`, which a NULL period_end
+  // can never satisfy — keeping manual drafts out of the cron path.
+  const isManual = customer.billing_cadence === 'manual';
+
   // Resolve period_end: prefer the cadence in the current month, but
   // if it has already passed, roll to next month so the new draft
   // gathers items toward the NEXT bill.
@@ -302,8 +309,11 @@ async function getOrCreateMonthlyDraft(customer, adminId, trx) {
     const nextMonth = today.getMonth() + 1;
     target = computeMonthlyCadenceDate(today.getFullYear(), nextMonth, cycleDay);
   }
-  const periodStart = new Date(target.getFullYear(), target.getMonth(), 1);
-  const periodEnd = target;
+  const periodStart = isManual ? null : new Date(target.getFullYear(), target.getMonth(), 1);
+  const periodEnd = isManual ? null : target;
+  // Placeholder issue/due date for the empty draft row — recomputed at
+  // issuance time. Manual drafts have no period_end, so fall back to today.
+  const placeholderDate = (periodEnd || today).toISOString().slice(0, 10);
 
   // Look up any existing open draft for this customer. We deliberately
   // do NOT filter by monthly_period_end here — only one draft can be
@@ -341,8 +351,8 @@ async function getOrCreateMonthlyDraft(customer, adminId, trx) {
     event_id: null,
     language,
     currency,
-    issue_date: periodEnd.toISOString().slice(0, 10),
-    due_date: periodEnd.toISOString().slice(0, 10), // recomputed at issuance time
+    issue_date: placeholderDate,
+    due_date: placeholderDate, // recomputed at issuance time
     installment_index: 0,
     installment_total: 1,
     status: 'scheduled',
@@ -355,8 +365,8 @@ async function getOrCreateMonthlyDraft(customer, adminId, trx) {
     business_bank_account_id: bank?.id || null,
     qr_format: null,
     is_monthly_draft: true,
-    monthly_period_start: periodStart.toISOString().slice(0, 10),
-    monthly_period_end: periodEnd.toISOString().slice(0, 10),
+    monthly_period_start: periodStart ? periodStart.toISOString().slice(0, 10) : null,
+    monthly_period_end: periodEnd ? periodEnd.toISOString().slice(0, 10) : null,
     // Migration 140 — each monthly-draft cycle is its own deal (no
     // quote/contract chain). Fresh UUID at creation; subsequent line
     // appends just mutate this same row, so the uuid sticks.
@@ -677,15 +687,19 @@ async function createInvoice(payload, adminId, trx = db) {
   const customer = await trx('customer_accounts').where({ id: payload.customerAccountId }).first();
   ensureCustomerCanBill(customer);
 
-  // Monthly-billing intercept (migration 128). For customers in
-  // billing_cadence='monthly' mode every createInvoice call APPENDS
-  // line items onto the running monthly-draft instead of minting a
+  // Accumulator intercept (migration 128). For customers in
+  // billing_cadence='monthly' OR 'manual' mode every createInvoice call
+  // APPENDS line items onto a single running draft instead of minting a
   // fresh invoice. Admin sees the editor flow exactly as before; the
   // returned id is the draft's id so the UI can redirect to the
-  // accumulator. `_skipMonthlyRouting` is the escape hatch used by
-  // internal helpers that need to mint a non-draft row (e.g. the
-  // accumulator itself, or future test fixtures).
-  if (customer.billing_cadence === 'monthly' && !payload._skipMonthlyRouting) {
+  // accumulator. The two modes differ only in WHEN the draft ships:
+  // 'monthly' auto-flushes on the cadence day (scheduler), 'manual'
+  // never auto-flushes (no period_end) and ships only via the admin
+  // "Trigger invoice now" gesture. `_skipMonthlyRouting` is the escape
+  // hatch used by internal helpers that need to mint a non-draft row
+  // (e.g. the accumulator itself, or future test fixtures).
+  if ((customer.billing_cadence === 'monthly' || customer.billing_cadence === 'manual')
+      && !payload._skipMonthlyRouting) {
     const draft = await appendToMonthlyDraft(payload, customer, adminId, trx);
     return { invoiceIds: draft?.id ? [draft.id] : [] };
   }

frontend/src/components/admin/HoursSection.tsx

@@ -17,7 +17,7 @@ import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
 import { useTranslation } from 'react-i18next';
 import { toast } from 'react-toastify';
 import { Clock } from 'lucide-react';
-import { Button, Card } from '../common';
+import { Button, Card, LocalizedDateInput } from '../common';
 import { DecimalInput } from '../common/DecimalInput';
 import { parseLocaleDecimal, parseDuration } from '../../utils/parsers';
 import { customerAdminService } from '../../services/customerAdmin.service';
@@ -224,8 +224,7 @@ export const HoursSection: React.FC<HoursSectionProps> = ({
             <label className="block text-xs text-muted-theme mb-1">
               {t('customers.hours.form.date', 'Date')}
             </label>
-            <input type="date" value={entryDate}
-              onChange={(e) => setEntryDate(e.target.value)} className="input w-full" />
+            <LocalizedDateInput value={entryDate} onChange={setEntryDate} />
           </div>
           <div>
             <label className="block text-xs text-muted-theme mb-1">

frontend/src/i18n/locales/de.json

@@ -3127,22 +3127,26 @@
     },
     "billing": {
       "section": "Abrechnungsrhythmus",
-      "hint": "Per-Event (Standard): jede Rechnung wird einzeln versendet. Monatlich: alle Rechnungen einer Periode werden zu einer Sammelrechnung gebündelt, die am konfigurierten Stichtag ausgelöst wird.",
+      "hint": "Per-Event (Standard): jede Rechnung wird einzeln versendet. Monatlich: alle Rechnungen einer Periode werden zu einer Sammelrechnung gebündelt, die am konfigurierten Stichtag ausgelöst wird. Manuell: Positionen sammeln sich genauso, aber die Rechnung wird erst versendet, wenn Sie sie auslösen.",
       "cadence": "Abrechnungsrhythmus",
       "perEvent": "Per Event",
       "monthly": "Monatlich",
       "quarterly": "Quartalsweise",
+      "manual": "Manuell (nur auf Auslösung)",
       "cycleDay": "Stichtag",
       "cycleDayHint": "1..28 = Tag im Monat. Negativ -1..-15 für „N Tage vor Monatsende“ (so löst -3 in einem 31-Tage-Monat am 28. aus).",
       "skontoDisabled": "Kein Skonto für diesen Kunden",
       "skontoDisabledHint": "Deaktiviert den Skonto-Abzug auf allen Rechnungen dieses Kunden – unabhängig von Vorlage oder globalen Standardwerten.",
       "triggerNow": "Rechnung jetzt ausstellen",
       "triggerConfirm": "Monatsrechnung für diesen Kunden jetzt ausstellen? Der Kunde erhält die E-Mail sofort.",
+      "triggerConfirmManual": "Gesammelte Rechnung für diesen Kunden jetzt ausstellen? Der Kunde erhält die E-Mail sofort.",
       "triggerHint": "Überspringt den Stichtag und stellt den aktuellen Entwurf sofort aus. Wird abgelehnt, wenn für die aktuelle Periode nichts erfasst wurde.",
+      "triggerHintManual": "Stellt den aktuellen Entwurf sofort aus. Entwürfe mit manuellem Rhythmus werden nie automatisch versendet – dies ist der einzige Weg, sie zu versenden. Wird abgelehnt, wenn nichts erfasst wurde.",
       "triggered": "Monatsrechnung ausgestellt: {{number}}",
       "triggerError": "Monatsrechnung konnte nicht ausgelöst werden.",
       "draftPreview": {
         "title": "Offen für die Rechnung dieses Monats",
+        "titleManual": "Offen – wird auf manuelle Auslösung versendet",
         "periodRange": "{{number}} · {{from}} – {{to}}"
       }
     },

frontend/src/i18n/locales/en.json

@@ -3127,22 +3127,26 @@
     },
     "billing": {
       "section": "Billing cadence",
-      "hint": "Per-event (default): every invoice is sent on its own schedule. Monthly: all invoices issued in the period accumulate into one bill that fires on the configured day.",
+      "hint": "Per-event (default): every invoice is sent on its own schedule. Monthly: all invoices issued in the period accumulate into one bill that fires on the configured day. Manual: items accumulate the same way, but the bill ships only when you trigger it.",
       "cadence": "Billing cadence",
       "perEvent": "Per event",
       "monthly": "Monthly",
       "quarterly": "Quarterly",
+      "manual": "Manual (trigger only)",
       "cycleDay": "Cycle day",
       "cycleDayHint": "1..28 = day of month. Use negative -1..-15 for \"N days before month end\" (so -3 fires on the 28th of a 31-day month).",
       "skontoDisabled": "No Skonto for this customer",
       "skontoDisabledHint": "Disables the early-payment discount on all of this customer’s invoices, regardless of template or global defaults.",
       "triggerNow": "Trigger invoice now",
       "triggerConfirm": "Issue this customer's monthly bill now? The customer receives the email immediately.",
+      "triggerConfirmManual": "Issue this customer's accumulated bill now? The customer receives the email immediately.",
       "triggerHint": "Bypasses the cadence day and issues the running draft immediately. Refuses when nothing has been queued for the current period.",
+      "triggerHintManual": "Issues the running draft immediately. Manual-cadence drafts never ship automatically — this is the only way to send them. Refuses when nothing has been queued.",
       "triggered": "Monthly bill issued: {{number}}",
       "triggerError": "Could not trigger the monthly bill.",
       "draftPreview": {
         "title": "Pending in this month's bill",
+        "titleManual": "Pending — ships on manual trigger",
         "periodRange": "{{number}} · {{from}} – {{to}}"
       }
     },

frontend/src/pages/admin/CustomerDetailPage.tsx

@@ -77,7 +77,7 @@ export const CustomerDetailPage: React.FC = () => {
     queryKey: ['admin-customer-monthly-draft', customerId],
     queryFn: () => customerAdminService.getMonthlyDraft(customerId),
     enabled: Number.isFinite(customerId) && customerId > 0
-      && (customer?.billingCadence === 'monthly'),
+      && (customer?.billingCadence === 'monthly' || customer?.billingCadence === 'manual'),
   });
   const monthlyDraft = monthlyDraftRes?.draft || null;
 
@@ -716,9 +716,10 @@ export const CustomerDetailPage: React.FC = () => {
               <option value="per_event">{t('customers.billing.perEvent', 'Per event')}</option>
               <option value="monthly">{t('customers.billing.monthly', 'Monthly')}</option>
               <option value="quarterly">{t('customers.billing.quarterly', 'Quarterly')}</option>
+              <option value="manual">{t('customers.billing.manual', 'Manual (trigger only)')}</option>
             </select>
           </div>
-          {form.billingCadence && form.billingCadence !== 'per_event' && (
+          {(form.billingCadence === 'monthly' || form.billingCadence === 'quarterly') && (
             <div>
               <label className="block text-sm font-medium text-theme mb-1">
                 {t('customers.billing.cycleDay', 'Cycle day')}
@@ -763,21 +764,26 @@ export const CustomerDetailPage: React.FC = () => {
             period so admin sees exactly what "Trigger invoice now"
             would ship. Hidden when no draft exists yet (admin hasn't
             saved anything onto the period). */}
-        {form.billingCadence === 'monthly' && monthlyDraft && monthlyDraft.lineItems.length > 0 && (
+        {(form.billingCadence === 'monthly' || form.billingCadence === 'manual') && monthlyDraft && monthlyDraft.lineItems.length > 0 && (
           <div className="mt-4 pt-4 border-t border-neutral-200 dark:border-neutral-700">
             <div className="flex items-center justify-between mb-2">
               <h3 className="text-sm font-semibold text-theme">
-                {t('customers.billing.draftPreview.title',
-                  'Pending in this month\'s bill')}
+                {form.billingCadence === 'manual'
+                  ? t('customers.billing.draftPreview.titleManual',
+                      'Pending — ships on manual trigger')
+                  : t('customers.billing.draftPreview.title',
+                      'Pending in this month\'s bill')}
               </h3>
               <span className="text-xs text-muted-theme">
-                {t('customers.billing.draftPreview.periodRange',
-                  '{{number}} · {{from}} – {{to}}',
-                  {
-                    number: monthlyDraft.invoiceNumber,
-                    from: fmtDate(monthlyDraft.periodStart),
-                    to: fmtDate(monthlyDraft.periodEnd),
-                  })}
+                {monthlyDraft.periodStart && monthlyDraft.periodEnd
+                  ? t('customers.billing.draftPreview.periodRange',
+                      '{{number}} · {{from}} – {{to}}',
+                      {
+                        number: monthlyDraft.invoiceNumber,
+                        from: fmtDate(monthlyDraft.periodStart),
+                        to: fmtDate(monthlyDraft.periodEnd),
+                      })
+                  : monthlyDraft.invoiceNumber}
               </span>
             </div>
             <div className="rounded-lg border border-neutral-200 dark:border-neutral-700 overflow-hidden">
@@ -834,20 +840,25 @@ export const CustomerDetailPage: React.FC = () => {
           </div>
         )}
 
-        {/* Manual trigger — issue the running monthly draft NOW
-            instead of waiting for the cadence-day scheduler tick.
-            Only shown for monthly-mode customers (per-event has no
-            draft to arm; the equivalent action there is "Bill these
-            hours" on the standalone Hours-logging page). */}
-        {form.billingCadence === 'monthly' && (
+        {/* Manual trigger — issue the running draft NOW. For monthly
+            customers this bypasses the cadence-day scheduler tick; for
+            manual-cadence customers it's the ONLY way the draft ships
+            (the scheduler never auto-flushes a manual draft). Per-event
+            has no draft to arm; the equivalent action there is "Bill
+            these hours" on the standalone Hours-logging page. */}
+        {(form.billingCadence === 'monthly' || form.billingCadence === 'manual') && (
           <div className="mt-4 pt-4 border-t border-neutral-200 dark:border-neutral-700">
             <Button
               variant="outline"
               disabled={triggerMonthlyBillMutation.isPending}
               isLoading={triggerMonthlyBillMutation.isPending}
               onClick={() => {
-                if (window.confirm(t('customers.billing.triggerConfirm',
-                  'Issue this customer\'s monthly bill now? The customer receives the email immediately.') as string)) {
+                const confirmMsg = form.billingCadence === 'manual'
+                  ? t('customers.billing.triggerConfirmManual',
+                      'Issue this customer\'s accumulated bill now? The customer receives the email immediately.')
+                  : t('customers.billing.triggerConfirm',
+                      'Issue this customer\'s monthly bill now? The customer receives the email immediately.');
+                if (window.confirm(confirmMsg as string)) {
                   triggerMonthlyBillMutation.mutate();
                 }
               }}
@@ -855,8 +866,11 @@ export const CustomerDetailPage: React.FC = () => {
               {t('customers.billing.triggerNow', 'Trigger invoice now')}
             </Button>
             <p className="text-xs text-muted-theme mt-2">
-              {t('customers.billing.triggerHint',
-                'Bypasses the cadence day and issues the running draft immediately. Refuses when nothing has been queued for the current period.')}
+              {form.billingCadence === 'manual'
+                ? t('customers.billing.triggerHintManual',
+                    'Issues the running draft immediately. Manual-cadence drafts never ship automatically — this is the only way to send them. Refuses when nothing has been queued.')
+                : t('customers.billing.triggerHint',
+                    'Bypasses the cadence day and issues the running draft immediately. Refuses when nothing has been queued for the current period.')}
             </p>
           </div>
         )}

frontend/src/pages/admin/EventDetailsPage.tsx

@@ -57,7 +57,7 @@ const safeParseDate = (dateValue: unknown): Date | null => {
 import { toast } from 'react-toastify';
 import { useLocalizedDate } from '../../hooks/useLocalizedDate';
 
-import { Button, Input, Card, Loading, MarkdownContent } from '../../components/common';
+import { Button, Input, Card, Loading, MarkdownContent, LocalizedDateInput } from '../../components/common';
 import { EventCategoryManager, AdminPhotoGrid, AdminPhotoViewer, PhotoFilters, PasswordResetModal, ThemeCustomizerEnhanced, ThemeDisplay, HeroPhotoSelector, FocalPointPicker, PhotoUploadModal, FeedbackSettings, FeedbackModerationPanel, EventRenameDialog, PhotoFilterPanel, PhotoExportMenu, AdminGuestsList } from '../../components/admin';
 import { CustomerAccountPicker } from '../../components/admin/CustomerAccountPicker';
 import { EventReminderOverrideCard } from '../../components/admin/EventReminderOverrideCard';
@@ -1194,10 +1194,9 @@ export const EventDetailsPage: React.FC = () => {
                   <label className="block text-sm font-medium text-neutral-700 dark:text-neutral-300 mb-1">
                     {t('events.expirationDate')}
                   </label>
-                  <Input
-                    type="date"
+                  <LocalizedDateInput
                     value={editForm.expires_at}
-                    onChange={(e) => setEditForm(prev => ({ ...prev, expires_at: e.target.value }))}
+                    onChange={(iso) => setEditForm(prev => ({ ...prev, expires_at: iso }))}
                     min={format(new Date(), 'yyyy-MM-dd')}
                   />
                 </div>

frontend/src/pages/admin/contracts/ContractEditorPage.tsx

@@ -17,7 +17,7 @@ import { useNavigate, useParams, Link } from 'react-router-dom';
 import { useQuery, useMutation } from '@tanstack/react-query';
 import { toast } from 'react-toastify';
 import { ArrowLeft, Eye, Save } from 'lucide-react';
-import { Button, Card, Input, Loading } from '../../../components/common';
+import { Button, Card, Input, Loading, LocalizedDateInput } from '../../../components/common';
 import {
   contractsService,
   type ContractBlockSection,
@@ -380,13 +380,13 @@ export const ContractEditorPage: React.FC = () => {
             <label className="block text-sm font-medium mb-1">
               {t('contracts.editor.issueDate', 'Issue date')}
             </label>
-            <Input type="date" value={issueDate} onChange={(e) => setIssueDate(e.target.value)} />
+            <LocalizedDateInput value={issueDate} onChange={setIssueDate} />
           </div>
           <div>
             <label className="block text-sm font-medium mb-1">
               {t('contracts.editor.validUntil', 'Sign by (optional)')}
             </label>
-            <Input type="date" value={validUntil} onChange={(e) => setValidUntil(e.target.value)} />
+            <LocalizedDateInput value={validUntil} onChange={setValidUntil} />
           </div>
         </div>
 
@@ -419,7 +419,7 @@ export const ContractEditorPage: React.FC = () => {
               <label className="block text-sm font-medium mb-1">
                 {t('contracts.editor.eventDate', 'Event date')}
               </label>
-              <Input type="date" value={eventDate} onChange={(e) => setEventDate(e.target.value)} />
+              <LocalizedDateInput value={eventDate} onChange={setEventDate} />
             </div>
             <div className="grid grid-cols-2 gap-2">
               <div>

frontend/src/pages/admin/quotes/QuoteEditorPage.tsx

@@ -16,7 +16,7 @@ import { useTranslation } from 'react-i18next';
 import { useNavigate, useParams, useSearchParams } from 'react-router-dom';
 import { useQuery, useQueryClient } from '@tanstack/react-query';
 import { ArrowLeft, Eye, Send } from 'lucide-react';
-import { Button, Card, Loading, Input } from '../../../components/common';
+import { Button, Card, Loading, Input, LocalizedDateInput } from '../../../components/common';
 import {
   quotesService,
   type QuoteCreatePayload,
@@ -490,8 +490,8 @@ export const QuoteEditorPage: React.FC = () => {
         <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
           <Input label={t('quotes.field.eventName', 'Event name') as string} value={form.eventName}
             onChange={(e) => setForm((f) => ({ ...f, eventName: e.target.value }))} />
-          <Input type="date" label={t('quotes.field.eventDate', 'Event date') as string} value={form.eventDate}
-            onChange={(e) => setForm((f) => ({ ...f, eventDate: e.target.value }))} />
+          <LocalizedDateInput label={t('quotes.field.eventDate', 'Event date') as string} value={form.eventDate}
+            onChange={(iso) => setForm((f) => ({ ...f, eventDate: iso }))} />
           <Input type="time" lang={timeInputLang} label={t('quotes.field.eventTimeStart', 'Start time') as string} value={form.eventTimeStart}
             onChange={(e) => setForm((f) => ({ ...f, eventTimeStart: e.target.value }))} />
           <Input type="time" lang={timeInputLang} label={t('quotes.field.eventTimeEnd', 'End time') as string} value={form.eventTimeEnd}
@@ -499,8 +499,8 @@ export const QuoteEditorPage: React.FC = () => {
           <Input type="number" step="0.5" label={t('quotes.field.expectedDuration', 'Expected duration (h)') as string}
             value={form.expectedDurationHours}
             onChange={(e) => setForm((f) => ({ ...f, expectedDurationHours: e.target.value }))} />
-          <Input type="date" label={t('quotes.field.validUntil', 'Valid until') as string} value={form.validUntil}
-            onChange={(e) => setForm((f) => ({ ...f, validUntil: e.target.value }))} />
+          <LocalizedDateInput label={t('quotes.field.validUntil', 'Valid until') as string} value={form.validUntil}
+            onChange={(iso) => setForm((f) => ({ ...f, validUntil: iso }))} />
         </div>
       </Card>
 

frontend/src/services/customerAdmin.service.ts

@@ -58,7 +58,7 @@ export interface CustomerAccountDetail extends CustomerAccountSummary {
    * - 'monthly' / 'quarterly': snap every scheduled invoice to
    *   `billingCycleDay` of the next period.
    */
-  billingCadence?: 'per_event' | 'monthly' | 'quarterly';
+  billingCadence?: 'per_event' | 'monthly' | 'quarterly' | 'manual';
   billingCycleDay?: number;
   /** Per-customer Skonto opt-out (migration 112). When true, none of
    *  this customer's invoices qualify for an early-payment discount,
@@ -360,16 +360,18 @@ export const customerAdminService = {
   },
 };
 
-/** Open monthly bill accumulator preview (migration 128). One row in
+/** Open bill accumulator preview (migration 128). One row in
  *  the invoices table with is_monthly_draft=true that gathers every
  *  invoice line created for this customer during the current period;
- *  ships on the cadence day or via triggerMonthlyBill. */
+ *  ships on the cadence day or via triggerMonthlyBill. Manual-cadence
+ *  drafts carry no period (periodStart/End null) and ship only on the
+ *  admin trigger. */
 export interface MonthlyDraftPreview {
   id: number;
   invoiceNumber: string;
   currency: string;
-  periodStart: string;
-  periodEnd: string;
+  periodStart: string | null;
+  periodEnd: string | null;
   netAmountMinor: number;
   vatRate: number | null;
   vatAmountMinor: number;