sequenceDiagram
    participant User
    participant SchemaComponent
    participant Dialog as Performance Fields Dialog
    participant Store as Vuex Store

    User->>SchemaComponent: Select fields to add to UDS
    SchemaComponent->>SchemaComponent: updateDefinedSchemaFields()
    
    alt UDS max limit exceeded
        SchemaComponent->>User: Show error notification
    else UDS is empty (first time)
        SchemaComponent->>SchemaComponent: getMissingPerformanceFields()
        SchemaComponent->>Store: Get default_fts_keys
        SchemaComponent->>Store: Get default_secondary_index_fields
        SchemaComponent->>SchemaComponent: Check schema for FTS fields
        SchemaComponent->>SchemaComponent: Check schema for Secondary Index fields
        
        alt Missing performance fields found
            SchemaComponent->>Dialog: Show popup with missing fields
            Dialog->>User: Display FTS and Secondary Index fields
            
            alt User clicks "Add Fields"
                User->>Dialog: Click "Add Fields"
                Dialog->>SchemaComponent: addPerformanceFields()
                SchemaComponent->>SchemaComponent: Combine pending + missing fields
                SchemaComponent->>SchemaComponent: proceedWithAddingFields()
                SchemaComponent->>SchemaComponent: Update defined_schema_fields
                SchemaComponent->>User: Fields added to UDS
            else User clicks "Skip"
                User->>Dialog: Click "Skip"
                Dialog->>SchemaComponent: skipPerformanceFields()
                SchemaComponent->>SchemaComponent: proceedWithAddingFields()
                SchemaComponent->>SchemaComponent: Update with pending fields only
                SchemaComponent->>User: Fields added without performance fields
            end
        else No missing fields
            SchemaComponent->>SchemaComponent: Add fields directly
            SchemaComponent->>User: Fields added to UDS
        end
    else UDS already has fields
        SchemaComponent->>SchemaComponent: Add fields directly
        SchemaComponent->>User: Fields added to UDS
    end