Function generate_application_full 

pub fn generate_application_full(
    document: &DampenDocument,
    model_name: &str,
    message_name: &str,
    handlers: &[HandlerSignature],
    theme_document: Option<&ThemeDocument>,
    persistence: Option<&PersistenceConfig>,
) -> Result<CodegenOutput, CodegenError>

Generate complete application code with theme, subscription, and persistence support

This is the most complete entry point for code generation that includes:

• Message enum with system theme variant (if follow_system is enabled)
• Subscription function for system theme detection
• Theme code generation
• View and update functions
• Window settings function for persistence (if persistence config is provided)
• Full window event handling for persistence (tracking size, position, save on close)

Arguments

• document - Parsed Dampen document
• model_name - Name of the model struct (e.g., “Model”)
• message_name - Name of the message enum (e.g., “Message”)
• handlers - List of handler signatures
• theme_document - Optional theme document for theme code generation
• persistence - Optional persistence configuration for window state

Returns

Ok(CodegenOutput) with generated code and warnings