sequenceDiagram
    participant User
    participant Component as EnvironmentVariables
    participant Parser as parseEnvVarLine
    participant API as Save/Upsert Mutations
    
    User->>Component: Paste env vars (Ctrl+V)
    Component->>Component: handlePaste(e, index)
    Component->>Component: Split by newline
    
    loop For each line
        Component->>Parser: parseEnvVarLine(line)
        Parser->>Parser: Trim whitespace
        
        alt Line is comment or empty
            Parser-->>Component: return null
        else Line contains export
            Parser->>Parser: Remove "export " prefix
        end
        
        Parser->>Parser: Find '=' index
        Parser->>Parser: Extract key before '='
        Parser->>Parser: Validate key with ENV_VAR_PATTERN
        
        alt Key invalid
            Parser-->>Component: return null
        end
        
        Parser->>Parser: Extract value after '='
        
        alt Looks like base64 + padding only + length > 20
            Parser-->>Component: return null (reject split base64)
        end
        
        alt Value not quoted
            Parser->>Parser: Remove inline comments (\s#)
        end
        
        Parser->>Parser: Strip quotes if present
        Parser-->>Component: return {key, value, id}
    end
    
    Component->>Component: Filter valid entries
    Component->>Component: Update envVars state
    
    User->>Component: Click Save
    Component->>API: savePersonalMutation.mutateAsync()
    Component->>API: upsertWorkspaceMutation.mutateAsync()
    API-->>Component: Success
    Component->>Component: Update initial refs
    Component-->>User: Changes saved