Add actionable push notifications and fix recurring task completion

Features:
- Add task action buttons to push notifications (complete, view, cancel, etc.)
- Add button types logic for different task states (overdue, in_progress, etc.)
- Implement Chain of Responsibility pattern for task categorization
- Add comprehensive kanban categorization documentation

Fixes:
- Reset recurring task status to Pending after completion so tasks appear
  in correct kanban column (was staying in "In Progress")
- Fix PostgreSQL EXTRACT function error in overdue notifications query
- Update seed data to properly set next_due_date for recurring tasks

Admin:
- Add tasks list to residence detail page
- Fix task edit page to properly handle all fields

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/repositories/contractor_repo.go

@@ -73,8 +73,9 @@ func (r *ContractorRepository) Create(contractor *models.Contractor) error {
 }
 
 // Update updates a contractor
+// Uses Omit to exclude associations that could interfere with Save
 func (r *ContractorRepository) Update(contractor *models.Contractor) error {
-	return r.db.Save(contractor).Error
+	return r.db.Omit("CreatedBy", "Specialties", "Tasks", "Residence").Save(contractor).Error
 }
 
 // Delete soft-deletes a contractor