feat(calendar,addressbook): prepare authz engine

src/application/services/recipient_notification_service.rs

@@ -472,11 +472,13 @@ impl RecipientNotificationService {
         let kind_key = match resource {
             Resource::Folder(_) => "server.magic_link.email.kind_folder",
             Resource::File(_) => "server.magic_link.email.kind_file",
-            // Drives don't generate share notifications in D0 — drive
-            // sharing lands in D2 and gets its own template key. Fall
-            // back to the folder label so any path that does reach
-            // here produces a readable, if generic, mail body.
-            Resource::Drive(_) => "server.magic_link.email.kind_folder",
+            // Drive / Calendar / AddressBook shares don't produce
+            // email notifications through this path. Fall back to the
+            // folder label so any code that does reach here still
+            // produces a readable (if generic) mail body.
+            Resource::Drive(_) | Resource::Calendar(_) | Resource::AddressBook(_) => {
+                "server.magic_link.email.kind_folder"
+            }
         };
         let kind_label = self.i18n_or(kind_key, &locale, &[]).await;
         // Short form for the subject, long form (with email) for the