chore: comprehensive cleanup of unused imports, dead code and compiler warnings

frontend/src/components/ui/multi_select.rs

@@ -9,7 +9,7 @@ use crate::components::hooks::use_can_scroll_vertical::use_can_scroll_vertical;
 use crate::components::hooks::use_random::use_random_id_for;
 // * Reuse @select.rs
 pub use crate::components::ui::select::{
-    SelectGroup as MultiSelectGroup, SelectItem as MultiSelectItem, SelectLabel as MultiSelectLabel,
+    SelectGroup as MultiSelectGroup, SelectItem as MultiSelectItem,
 };
 
 #[derive(Clone, Copy, PartialEq, Eq, Default)]