feat(activities): split customer column, wider search, custom activity types with type-specific fields

- Table: separate assignee and customer columns; search by assignee and activity type
- ActivityTypeDef model with per-type field definitions (text, select, checklist, participants, ...)
- Default types incl. meeting subject/participants and task checklist; admins manage types
- Participants see activities in their lists and get notified

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/activities/activities.module.ts

@@ -3,6 +3,7 @@ import { ActivitiesController } from './activities.controller';
 import { ActivitiesService } from './activities.service';
 import { ActivitiesExcelService } from './activities-excel.service';
 import { ActivityStagesService } from './activity-stages.service';
+import { ActivityTypesService } from './activity-types.service';
 import { NotificationsModule } from '../notifications/notifications.module';
 import { AutomationsModule } from '../automations/automations.module';
 import { MessageAutomationsModule } from '../message-automations/message-automations.module';
@@ -10,7 +11,12 @@ import { MessageAutomationsModule } from '../message-automations/message-automat
 @Module({
   imports: [NotificationsModule, AutomationsModule, MessageAutomationsModule],
   controllers: [ActivitiesController],
-  providers: [ActivitiesService, ActivitiesExcelService, ActivityStagesService],
-  exports: [ActivitiesService, ActivityStagesService],
+  providers: [
+    ActivitiesService,
+    ActivitiesExcelService,
+    ActivityStagesService,
+    ActivityTypesService,
+  ],
+  exports: [ActivitiesService, ActivityStagesService, ActivityTypesService],
 })
 export class ActivitiesModule {}