[ATTACH-04] Implement Attachment UI — Event & Organization

[kilip]

Description

Build the attachment management UI for events and organizations, including upload, list, and delete functionality.

Subtasks

• ATTACH-04-ST-01 Build AttachmentList widget — displays list of attachments with name, type icon, viewer link, and delete action
• ATTACH-04-ST-02 Build AttachmentUpload widget — file input with name field, triggers AttachmentService.upload
• ATTACH-04-ST-03 Integrate AttachmentList + AttachmentUpload into Event Detail page
• ATTACH-04-ST-04 Integrate AttachmentList + AttachmentUpload into Organization Detail page
• ATTACH-04-ST-05 Integrate AttachmentList + AttachmentUpload into Term management (on Org Detail page)
• ATTACH-04-ST-06 Wire up Server Actions: uploadAttachmentAction, deleteAttachmentAction

Acceptance Criteria

• ATTACH-04-AC-01 Org admin and owner can upload and delete attachments
• ATTACH-04-AC-02 All org members can view (open viewer URL) attachments
• ATTACH-04-AC-03 Upload requires a name field (display name)
• ATTACH-04-AC-04 Delete permanently removes file from Google Drive via AttachmentService.delete
• ATTACH-04-AC-05 Attachment list shows file name, type icon, and "Lihat Dokumen" link

Technical Notes

• Docs: ERD#26-attachments · PRD#101-storage-responsibility
• Screen spec: docs/screen.md → Organization Detail, Event Detail