refactor: migrate state imports from contexts to stores directory

src/providers/root-providers.tsx

@@ -12,10 +12,10 @@
 
 import type { ReactNode } from "react";
 
-import { AuthProvider } from "@/contexts/auth/auth-context";
-import { ChatProvider } from "@/contexts/chat/chat-context";
-import { SidebarProvider } from "@/contexts/sidebar/sidebar-context";
-import { UserProvider } from "@/contexts/user/user-context";
+import { AuthProvider } from "@/stores/auth/auth-context";
+import { ChatProvider } from "@/stores/chat/chat-context";
+import { SidebarProvider } from "@/stores/sidebar/sidebar-context";
+import { UserProvider } from "@/stores/user/user-context";
 
 export interface RootProvidersProps {
   children: ReactNode;