Batch Signature Management with Collectives Integration

LibreSign currently requires adding participants individually. We need batch signature management using Nextcloud Collectives, where each Collective represents a signature batch (project, contract, initiative).

Why Collectives (not Groups)?

• Better semantic context (projects/initiatives vs system permissions)
• Built for collaboration with documentation support
• More flexible member management
• Avoids confusion between system groups and signature batches

Required Features

1. CRUD Management in LibreSign Menu

Interface to create/edit/delete Collectives and manage members directly from LibreSign.

2. Smart Collective Selection

When adding participants, allow selecting a Collective with smart filtering:

• Filter by contact method (email/WhatsApp/SMS/Telegram)
• Show only Collectives with valid contacts for selected method
• Display member count (e.g., "Project Alpha: 12 valid emails out of 15 members")

3. Frontend Member Expansion

When a Collective is selected, expand all members into the regular participants list. This keeps backend simple - no Collective resolution during signing, just individual signers.

UI Concept

Contact Method: [Email ▼]

Available Batches:
📁 Project Alpha (15 members, 12 with email)
📁 Q1 2026 NDAs (23 members, 20 with email)

[Select] → Expands into individual participants list

Benefits

• Users can review/modify expanded list before sending
• Reuses existing signer validation logic
• No additional database tables needed
• Simple backend (processes individual signers only)

Dependency

Requires Collectives app installed. Show friendly message if unavailable.

Start by reviewing LibreSign's existing participant management and how the LibreSign menu handles related actions, then investigate the available Nextcloud Collectives integration. Done means users can manage Collectives and members, filter batches by contact method, expand selected members into editable individual participants, and receive a friendly message when Collectives is unavailable.