feat(crm): add event_reminder_* templates to dev email tester

The pre-event reminder feature shipped with 5 seeded templates
(event_reminder_default + wedding/birthday/corporate/other) but the
CRM → Development "Send any CRM email to me" picker only listed the
quote/invoice/contract templates. Maintainer can now eyeball each
reminder category's body without staging a real event.

Backend:
- Extend TEMPLATES_KEYS in adminDev.js with all 5 reminder keys.
- Add event_date (today+2d), days_before (2), business_name (from
  business_profile.legal_name) to the common payload so the
  {{tokens}} in the reminder bodies resolve.

Frontend:
- Extend CrmEmailTemplateKey union.
- Add TEMPLATE_LABEL_KEYS entries.
- EN+DE i18n labels under crmDev.templates.label.event_reminder_*.

No PDF attachment — reminders are body-only emails (matches the
real flow).

backend/src/routes/adminDev.js

@@ -98,6 +98,16 @@ const TEMPLATES_KEYS = [
   'contract_sent',
   'contract_signed_admin_notification',
   'contract_fully_signed',
+  // Pre-event reminder emails (migration 143). The runtime resolver
+  // picks `event_reminder_<events.event_type>` with fallback to
+  // `event_reminder_default`. The dev tester exposes every seeded
+  // template so the maintainer can eyeball each category's body
+  // without staging a real event for each.
+  'event_reminder_default',
+  'event_reminder_wedding',
+  'event_reminder_birthday',
+  'event_reminder_corporate',
+  'event_reminder_other',
 ];
 
 router.get(
@@ -355,11 +365,20 @@ async function buildPayloadFor(key, adminId, frontendUrl) {
   const today = new Date();
   const dueDate = new Date(today.getTime() - 5 * 86400000);
   const validUntil = new Date(today.getTime() + 14 * 86400000);
+  // Pre-event reminder mock: pretend the event is 2 days out (the
+  // global default for `crm_event_reminders_days_before`). Renders
+  // {{event_date}} + {{days_before}} for the event_reminder_*
+  // templates.
+  const eventDate = new Date(today.getTime() + 2 * 86400000);
+  const businessProfile = await db('business_profile').first().catch(() => null);
 
   const common = {
     customer_name: 'Sample Customer',
     customer_email: 'sample.customer@example.test',
     event_name: 'Sample Event',
+    event_date: fakeShortDate(eventDate),
+    days_before: 2,
+    business_name: businessProfile?.legal_name || 'Sample Studio',
     invoice_number: 'R-DEV-0001',
     quote_number: 'Q-DEV-0001',
     total_amount: fakeMoney(total, 'CHF'),

frontend/src/i18n/locales/de.json

@@ -3317,6 +3317,26 @@
         "contract_fully_signed": {
           "title": "Vertrag beidseitig unterzeichnet",
           "description": "Beidseitiger Versand, sobald beide Unterschriften vorliegen. Gestempeltes Vertrags-PDF im Anhang."
+        },
+        "event_reminder_default": {
+          "title": "Event-Erinnerung — Standard (Fallback)",
+          "description": "Vor-Event-Erinnerung, wenn keine kategoriespezifische Vorlage zutrifft."
+        },
+        "event_reminder_wedding": {
+          "title": "Event-Erinnerung — Hochzeit",
+          "description": "Vor-Event-Erinnerung für Events mit event_type=wedding."
+        },
+        "event_reminder_birthday": {
+          "title": "Event-Erinnerung — Geburtstag",
+          "description": "Vor-Event-Erinnerung für Events mit event_type=birthday."
+        },
+        "event_reminder_corporate": {
+          "title": "Event-Erinnerung — Firma",
+          "description": "Vor-Event-Erinnerung für Events mit event_type=corporate."
+        },
+        "event_reminder_other": {
+          "title": "Event-Erinnerung — Sonstiges",
+          "description": "Vor-Event-Erinnerung für Events mit event_type=other."
         }
       }
     }

frontend/src/i18n/locales/en.json

@@ -3317,6 +3317,26 @@
         "contract_fully_signed": {
           "title": "Contract fully signed (dual-party)",
           "description": "Dual-party send once both signatures are in. Stamped contract PDF attached."
+        },
+        "event_reminder_default": {
+          "title": "Event reminder — default (catch-all)",
+          "description": "Pre-event nudge used when no per-category template matches."
+        },
+        "event_reminder_wedding": {
+          "title": "Event reminder — wedding",
+          "description": "Pre-event nudge for events with event_type=wedding."
+        },
+        "event_reminder_birthday": {
+          "title": "Event reminder — birthday",
+          "description": "Pre-event nudge for events with event_type=birthday."
+        },
+        "event_reminder_corporate": {
+          "title": "Event reminder — corporate",
+          "description": "Pre-event nudge for events with event_type=corporate."
+        },
+        "event_reminder_other": {
+          "title": "Event reminder — other",
+          "description": "Pre-event nudge for events with event_type=other."
         }
       }
     }

frontend/src/pages/admin/clients/CrmDevelopmentPage.tsx

@@ -98,6 +98,36 @@ const TEMPLATE_LABEL_KEYS: Record<
     descKey: 'crmDev.templates.label.contract_fully_signed.description',
     descFallback: 'Dual-party send once both signatures are in. Stamped contract PDF attached.',
   },
+  event_reminder_default: {
+    titleKey: 'crmDev.templates.label.event_reminder_default.title',
+    titleFallback: 'Event reminder — default (catch-all)',
+    descKey: 'crmDev.templates.label.event_reminder_default.description',
+    descFallback: 'Pre-event nudge used when no per-category template matches.',
+  },
+  event_reminder_wedding: {
+    titleKey: 'crmDev.templates.label.event_reminder_wedding.title',
+    titleFallback: 'Event reminder — wedding',
+    descKey: 'crmDev.templates.label.event_reminder_wedding.description',
+    descFallback: 'Pre-event nudge for events with event_type=wedding.',
+  },
+  event_reminder_birthday: {
+    titleKey: 'crmDev.templates.label.event_reminder_birthday.title',
+    titleFallback: 'Event reminder — birthday',
+    descKey: 'crmDev.templates.label.event_reminder_birthday.description',
+    descFallback: 'Pre-event nudge for events with event_type=birthday.',
+  },
+  event_reminder_corporate: {
+    titleKey: 'crmDev.templates.label.event_reminder_corporate.title',
+    titleFallback: 'Event reminder — corporate',
+    descKey: 'crmDev.templates.label.event_reminder_corporate.description',
+    descFallback: 'Pre-event nudge for events with event_type=corporate.',
+  },
+  event_reminder_other: {
+    titleKey: 'crmDev.templates.label.event_reminder_other.title',
+    titleFallback: 'Event reminder — other',
+    descKey: 'crmDev.templates.label.event_reminder_other.description',
+    descFallback: 'Pre-event nudge for events with event_type=other.',
+  },
 };
 
 export const CrmDevelopmentPage: React.FC = () => {

frontend/src/services/devTools.service.ts

@@ -22,7 +22,16 @@ export type CrmEmailTemplateKey =
   // template_key strings.
   | 'contract_sent'
   | 'contract_signed_admin_notification'
-  | 'contract_fully_signed';
+  | 'contract_fully_signed'
+  // Pre-event reminder emails (migration 143). One template per
+  // event_type with a catch-all default. Backend resolves
+  // `event_reminder_<event_type>` then falls back to
+  // `event_reminder_default`.
+  | 'event_reminder_default'
+  | 'event_reminder_wedding'
+  | 'event_reminder_birthday'
+  | 'event_reminder_corporate'
+  | 'event_reminder_other';
 
 export interface DevEmailTemplateStatus {
   key: CrmEmailTemplateKey;