Refactor code structure and remove redundant changes

src-old/hooks/useSidebar.ts

@@ -0,0 +1,11 @@
+import { useContext } from "react";
+import { SidebarContext } from "@/components/ui/sidebar-context";
+
+export function useSidebar() {
+  const context = useContext(SidebarContext);
+  if (!context) {
+    throw new Error("useSidebar must be used within a SidebarProvider.");
+  }
+
+  return context;
+}