Function call_hierarchy_to_row 

pub fn call_hierarchy_to_row(
    item: &CallHierarchyItem,
    related_to: &str,
) -> SymbolRow

Render one CallHierarchyItem (the caller / callee) as a SymbolRow for the picker. The item’s detail (if any) plus the originating callable’s name ride in container. Phase 5.8.AD.2: hoisted from TUI App.