Backend:
- Added POST /city/agents endpoint for creating agents
- Added DELETE /city/agents/{id} endpoint for soft-deleting agents
- Added CreateAgentRequest, CreateAgentResponse, DeleteAgentResponse models
Frontend:
- Added '+ Новий агент' button on /agents page
- Created /agents/new page with full agent creation form
- Added 'Видалити агента' button in agent Identity tab (Danger Zone)
Features:
- Auto-generate slug from display_name
- Support for all agent fields: kind, role, model, node, district, microdao
- Color picker for agent color
- Visibility toggles (is_public, is_orchestrator)
- Soft delete with confirmation dialog
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