- Added departments ManyToMany field to Document model
- Implemented department selection in document create/edit modals
- Added automatic notification creation for all department employees
- Fixed document filtering to include uploaded documents in 'My Documents'
- Fixed acknowledgements API to include department recipients
- Added bulk notification support with configurable threshold
- Removed acknowledge button, added visual highlighting for unread documents
- Implemented server-side acknowledgment flow with redirect to file
- Fixed mobile responsive layout for document actions
- Removed temporary test files and documentation