fix: form submission hooks — tenant propagation + email notification

- FormSubmissionsOverrides: fields must be a function (not array) for
  the form-builder plugin to merge them with defaultFields
- setSubmissionTenant: add overrideAccess for unauthenticated submissions
- sendFormNotification: handle populated form object (extract ID),
  add overrideAccess for tenant SMTP lookup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/collections/FormSubmissionsOverrides.ts

@@ -1,29 +1,22 @@
 // src/collections/FormSubmissionsOverrides.ts
 
-import type { CollectionConfig } from 'payload'
+import type { CollectionConfig, Field } from 'payload'
 
 /**
  * FormSubmissions Overrides
  *
  * Erweitert die vom formBuilderPlugin erstellte FormSubmissions Collection um:
+ * - Tenant-Zuweisung (automatisch vom Formular)
  * - Status-Workflow (neu → in Bearbeitung → erledigt)
  * - Interne Notizen
  * - Zuständigkeits-Zuweisung
  * - Verbesserte Admin-Ansicht
+ *
+ * WICHTIG: fields MUSS eine Funktion sein, da das formBuilderPlugin
+ * ein Array stillschweigend ignoriert und nur defaultFields verwendet.
  */
-export const formSubmissionOverrides: Partial<CollectionConfig> = {
-  admin: {
-    useAsTitle: 'id',
-    group: 'Formulare',
-    defaultColumns: ['id', 'form', 'status', 'assignedTo', 'createdAt'],
-    description: 'Eingegangene Formular-Einsendungen',
-    listSearchableFields: ['id', 'status'],
-  },
-  labels: {
-    singular: 'Formular-Einsendung',
-    plural: 'Formular-Einsendungen',
-  },
-  fields: [
+
+const customFields: Field[] = [
     // Tenant (automatisch vom Formular übernommen via setSubmissionTenant Hook)
     {
       name: 'tenant',
@@ -222,5 +215,22 @@ export const formSubmissionOverrides: Partial<CollectionConfig> = {
         readOnly: true,
       },
     },
-  ],
+]
+
+export const formSubmissionOverrides: Partial<CollectionConfig> = {
+  admin: {
+    useAsTitle: 'id',
+    group: 'Formulare',
+    defaultColumns: ['id', 'form', 'tenant', 'status', 'assignedTo', 'createdAt'],
+    description: 'Eingegangene Formular-Einsendungen',
+    listSearchableFields: ['id', 'status'],
+  },
+  labels: {
+    singular: 'Formular-Einsendung',
+    plural: 'Formular-Einsendungen',
+  },
+  fields: (({ defaultFields }: { defaultFields: Field[] }) => [
+    ...defaultFields,
+    ...customFields,
+  ]) as unknown as Field[],
 }

src/hooks/sendFormNotification.ts

@@ -38,11 +38,13 @@ export const sendFormNotification: CollectionAfterChangeHook = async ({
   const { payload } = req
 
   try {
-    // Form laden mit Details
+    // Form laden mit Details — doc.form kann bereits populated sein (Objekt statt ID)
+    const formId = typeof doc.form === 'object' ? doc.form?.id : doc.form
     const form = (await payload.findByID({
       collection: 'forms',
-      id: doc.form,
+      id: formId,
       depth: 1,
+      overrideAccess: true,
     })) as FormDocument | null
 
     if (!form) {

src/hooks/setSubmissionTenant.ts

@@ -25,6 +25,7 @@ export const setSubmissionTenant: CollectionBeforeChangeHook = async ({
       collection: 'forms',
       id: formId,
       depth: 0,
+      overrideAccess: true,
     })) as unknown as FormWithTenant
 
     if (form?.tenant) {