Document Attachments

NHF explicitly named document attachments as important for Bufdir verification, citing invitations and social media screenshots as common evidence types. Attaching files to activity records transforms raw log data into auditable records, strengthening the organization's position during Bufdir reviews and funding assessments. Without attachments, coordinators must separately track supporting materials, creating fragmented records and audit risk. The feature also enables richer documentation for complex events requiring formal evidence of participation or delivery.

Implemented via DocumentPickerWidget using Flutter's file_picker and image_picker plugins. AttachmentService handles upload via multipart REST API calls with progress feedback. FileStorageService manages cloud storage with size validation and permitted file type enforcement. AttachmentRepository stores metadata (name, type, size, URL, activity_id) in activity_documents. File metadata caches offline; uploads queue in the mutation outbox for deferred submission when connectivity resumes. Size limits and permitted types are enforced both client-side and server-side for security.