fix: sanitize sub block field permissions correctly (#9296)

Fixes https://github.com/payloadcms/payload/issues/9288

### What?
When a block had a subfield named `blocks`, sanitization would throw an
error.

### Why?
An incorrect check for the key of `"fields"` would then attempt to pass
`data.blocks[key].fields` aka `data.blocks.fields.fields` to the next
call of `areAllPermissionsTrue` which would be undefined. Instead if the
key is `fields` it should pass `data.blocks[key]`.

### How?
Remove the second `.fields` property accessor.

packages/payload/src/auth/types.ts

@@ -14,9 +14,18 @@ export type Permission = {
 export type FieldPermissions = {
   blocks?: {
     [blockSlug: string]: {
+      create: {
+        permission: boolean
+      }
       fields: {
         [fieldName: string]: FieldPermissions
       }
+      read: {
+        permission: boolean
+      }
+      update: {
+        permission: boolean
+      }
     }
   }
   create: {

packages/payload/src/utilities/sanitizePermissions.spec.ts

@@ -157,6 +157,15 @@ describe('recursivelySanitizePermissions', () => {
                   },
                 },
               },
+              create: {
+                permission: true,
+              },
+              read: {
+                permission: true,
+              },
+              update: {
+                permission: true,
+              },
             },
           },
           read: {
@@ -236,6 +245,15 @@ describe('recursivelySanitizePermissions', () => {
                   },
                 },
               },
+              create: {
+                permission: true,
+              },
+              read: {
+                permission: true,
+              },
+              update: {
+                permission: true,
+              },
             },
           },
           read: {
@@ -267,6 +285,9 @@ describe('recursivelySanitizePermissions', () => {
                   read: true,
                 },
               },
+              create: true,
+              update: true,
+              read: true,
             },
           },
           read: true,
@@ -349,6 +370,79 @@ describe('recursivelySanitizePermissions', () => {
     })
   })
 
+  it('should sanitize blocks with subfield named blocks', () => {
+    const permissions: CollectionPermission = {
+      fields: {
+        content: {
+          create: { permission: true },
+          blocks: {
+            test: {
+              fields: {
+                blocks: {
+                  create: { permission: true },
+                  fields: {
+                    arrayText: {
+                      create: { permission: true },
+                      read: { permission: true },
+                      update: { permission: true },
+                    },
+                    id: {
+                      create: { permission: true },
+                      read: { permission: true },
+                      update: { permission: true },
+                    },
+                  },
+                  read: { permission: true },
+                  update: { permission: true },
+                },
+                id: {
+                  create: { permission: true },
+                  read: { permission: true },
+                  update: { permission: true },
+                },
+                blockName: {
+                  create: { permission: true },
+                  read: { permission: true },
+                  update: { permission: true },
+                },
+              },
+              create: { permission: true },
+              read: { permission: true },
+              update: { permission: true },
+            },
+          },
+          read: { permission: true },
+          update: { permission: true },
+        },
+      },
+      create: {
+        permission: true,
+      },
+      read: {
+        permission: true,
+      },
+      update: {
+        permission: true,
+      },
+      delete: {
+        permission: false,
+      },
+      readVersions: {
+        permission: true,
+      },
+    }
+
+    recursivelySanitizePermissions(permissions)
+
+    expect(permissions).toStrictEqual({
+      fields: true,
+      create: true,
+      read: true,
+      update: true,
+      readVersions: true,
+    })
+  })
+
   it('should sanitize a collection with nested fields in richText', () => {
     const permissions: Partial<CollectionPermission> = {
       fields: {

packages/payload/src/utilities/sanitizePermissions.ts

@@ -12,7 +12,7 @@ function areAllPermissionsTrue(data: PermissionObject): boolean {
     for (const key in data.blocks) {
       if (typeof data.blocks[key] === 'object') {
         // If any recursive call returns false, the whole function returns false
-        if (key === 'fields' && !areAllPermissionsTrue(data.blocks[key].fields)) {
+        if (key === 'fields' && !areAllPermissionsTrue(data.blocks[key])) {
           return false
         }
         if (data.blocks[key].fields && !areAllPermissionsTrue(data.blocks[key].fields)) {