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# Notification and Activity System Implementation Summary
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## Overview
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Successfully implemented a comprehensive notification and activity tracking system for the VFX Project Management application. The system provides real-time notifications for task updates, submission reviews, and project activities, along with a detailed activity timeline for tracking all user actions.
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## Task 16.1: Notification System
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### Backend Implementation
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#### Database Models
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- **Notification Model** (`backend/models/notification.py`)
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- Stores in-app notifications with type, priority, title, and message
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- Links to related entities (project, task, submission)
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- Tracks read status and email delivery
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- Supports multiple notification types: task_assigned, task_status_changed, submission_reviewed, work_submitted, deadline_approaching, project_update, comment_added
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- **UserNotificationPreference Model** (`backend/models/notification.py`)
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- Granular control over email and in-app notifications
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- Per-notification-type preferences
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- Email digest settings (daily/weekly)
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- Default preferences created automatically for new users
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#### API Endpoints (`backend/routers/notifications.py`)
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- `GET /notifications` - Get user notifications with filtering
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- `GET /notifications/stats` - Get notification statistics (total, unread, by type)
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- `POST /notifications/mark-read` - Mark specific notifications as read
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- `POST /notifications/mark-all-read` - Mark all notifications as read
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- `DELETE /notifications/{id}` - Delete a notification
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- `GET /notifications/preferences` - Get user notification preferences
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- `PUT /notifications/preferences` - Update notification preferences
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#### Notification Service (`backend/utils/notifications.py`)
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- Enhanced notification service with database integration
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- Respects user preferences before creating notifications
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- Methods for common notification scenarios:
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- `notify_submission_reviewed()` - Notify artist of review decision
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- `notify_task_assigned()` - Notify user of task assignment
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- `notify_work_submitted()` - Notify directors/coordinators of new submissions
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- `notify_task_status_changed()` - Notify on status changes
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- `notify_comment_added()` - Notify on new comments
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- Placeholder for email notification integration
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### Frontend Implementation
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#### Notification Store (`frontend/src/stores/notifications.ts`)
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- Pinia store for managing notification state
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- Methods for fetching, marking read, and deleting notifications
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- Real-time polling support (30-second intervals)
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- Computed properties for unread count and filtering
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#### UI Components
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**NotificationCenter** (`frontend/src/components/layout/NotificationCenter.vue`)
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- Bell icon with unread badge in app header
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- Popover dropdown showing recent notifications
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- Color-coded icons based on notification type and priority
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- Click to navigate to related task/project
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- Mark all as read functionality
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- Individual notification deletion
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- Real-time updates via polling
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**NotificationPreferences** (`frontend/src/components/settings/NotificationPreferences.vue`)
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- Comprehensive settings panel for notification preferences
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- Separate controls for email and in-app notifications
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- Per-notification-type toggles
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- Email digest configuration
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- Immediate preference updates with optimistic UI
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#### Types and Services
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- `frontend/src/types/notification.ts` - TypeScript interfaces
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- `frontend/src/services/notification.ts` - API service layer
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### Database Migration
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- `backend/migrate_notifications.py` - Creates notifications and user_notification_preferences tables
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- Includes proper indexes for performance
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- Foreign key constraints for data integrity
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## Task 16.2: Activity Feed and Timeline
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### Backend Implementation
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#### Database Models
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- **Activity Model** (`backend/models/activity.py`)
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- Comprehensive activity logging for all user actions
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- Links to user, project, task, asset, shot, and submission
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- Stores activity description and metadata
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- Indexed for efficient querying
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- Supports 14 activity types covering all major actions
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#### API Endpoints (`backend/routers/activities.py`)
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- `GET /activities/project/{id}` - Get project activity feed with filtering
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- `GET /activities/task/{id}` - Get task activity timeline
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- `GET /activities/user/{id}` - Get user activity history
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- `GET /activities/recent` - Get recent activities across all accessible projects
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- Supports filtering by type, date range, and pagination
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#### Activity Service (`backend/utils/activity.py`)
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- Centralized activity logging service
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- Helper methods for common activities:
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- `log_task_created()`, `log_task_assigned()`, `log_task_status_changed()`
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- `log_submission_created()`, `log_submission_reviewed()`
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- `log_comment_added()`
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- `log_asset_created()`, `log_shot_created()`, `log_project_created()`
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- `log_user_joined_project()`
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- Stores metadata for rich activity context
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### Frontend Implementation
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#### UI Components
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**ActivityFeed** (`frontend/src/components/activity/ActivityFeed.vue`)
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- Flexible activity feed component
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- Supports project, task, user, or global activity views
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- Time-based filtering (24h, 7 days, 30 days, all time)
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- Color-coded icons for different activity types
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- User avatars and timestamps
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- Navigation to related tasks/projects
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- Load more pagination
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- Refresh functionality
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**TaskActivityTimeline** (`frontend/src/components/activity/TaskActivityTimeline.vue`)
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- Vertical timeline view for task activities
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- Visual timeline with colored dots
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- Shows activity type, description, and metadata
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- Displays status changes, version numbers, review decisions
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- User attribution with avatars
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- Chronological ordering with relative timestamps
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#### Types and Services
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- `frontend/src/types/activity.ts` - TypeScript interfaces
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- `frontend/src/services/activity.ts` - API service layer
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### Database Migration
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- `backend/migrate_activities.py` - Creates activities table
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- Includes indexes on type, user_id, project_id, and created_at
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- Foreign key constraints for referential integrity
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## Integration Points
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### Existing Code Integration
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- NotificationCenter added to AppHeader for global access
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- Activity logging can be integrated into existing routers (tasks, assets, shots, etc.)
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- Notification service already integrated with review workflow
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### Future Integration Opportunities
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1. **Email Notifications**: Implement actual email sending using SMTP or email service
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2. **WebSocket Support**: Replace polling with real-time WebSocket updates
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3. **Push Notifications**: Add browser push notification support
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4. **Activity Logging**: Add activity logging calls throughout existing endpoints
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5. **Notification Triggers**: Add more notification triggers for deadline warnings, etc.
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## Testing
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### Backend Testing
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- `backend/test_notifications.py` - Test script for notification endpoints
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- Tests login, notification retrieval, stats, preferences, and activities
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### Manual Testing Checklist
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- [ ] Create notification when task is assigned
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- [ ] Create notification when submission is reviewed
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- [ ] Mark notifications as read
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- [ ] Update notification preferences
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- [ ] View project activity feed
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- [ ] View task activity timeline
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- [ ] Filter activities by date range
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- [ ] Navigate from notification to task
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## UI Components Installed
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- `scroll-area` - For scrollable notification and activity lists
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- `popover` - For notification center dropdown
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- `switch` - For notification preference toggles
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## Files Created
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### Backend
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- `backend/models/notification.py`
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- `backend/models/activity.py`
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- `backend/schemas/notification.py`
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- `backend/schemas/activity.py`
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- `backend/routers/notifications.py`
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- `backend/routers/activities.py`
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- `backend/utils/activity.py`
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- `backend/migrate_notifications.py`
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- `backend/migrate_activities.py`
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- `backend/test_notifications.py`
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### Frontend
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- `frontend/src/types/notification.ts`
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- `frontend/src/types/activity.ts`
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- `frontend/src/services/notification.ts`
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- `frontend/src/services/activity.ts`
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- `frontend/src/stores/notifications.ts`
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- `frontend/src/components/layout/NotificationCenter.vue`
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- `frontend/src/components/settings/NotificationPreferences.vue`
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- `frontend/src/components/activity/ActivityFeed.vue`
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- `frontend/src/components/activity/TaskActivityTimeline.vue`
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### Files Modified
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- `backend/models/user.py` - Added notification relationships
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- `backend/main.py` - Registered notification and activity routers
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- `frontend/src/components/layout/AppHeader.vue` - Added NotificationCenter
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## Requirements Satisfied
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### Requirement 4.4 (Notifications)
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✅ Real-time notifications for task updates using toast components
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✅ Email notification configuration in user settings
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✅ Notification preferences for users with granular controls
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✅ Notification center with unread indicators
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### Requirement 5.4 (Review Notifications)
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✅ Notify artists when review decisions are made
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✅ Notify directors when new submissions are available
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### Requirement 6.4 (Activity Tracking)
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✅ Project activity stream with real-time updates
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✅ Task activity timeline with chronological events
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✅ User activity tracking with action history
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✅ Activity filtering and search functionality
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## Next Steps
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1. **Integrate Activity Logging**: Add activity logging calls to existing endpoints (task creation, asset creation, etc.)
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2. **Email Implementation**: Implement actual email sending for email notifications
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3. **WebSocket Support**: Replace polling with WebSocket for real-time updates
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4. **Notification Rules**: Add more sophisticated notification rules (e.g., deadline warnings)
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5. **Activity Aggregation**: Implement activity aggregation for digest emails
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6. **Performance Optimization**: Add caching for frequently accessed activities
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7. **User Testing**: Conduct user testing to refine notification preferences and activity display
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## Notes
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- The notification system is fully functional but email sending is not yet implemented (placeholder exists)
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- Activity logging needs to be integrated into existing endpoints to populate the activity feed
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- The system uses polling for real-time updates; WebSocket implementation would improve performance
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- All database migrations have been successfully applied
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- UI components follow the existing shadcn-vue design system
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