fix: streamline error handling and clean up unused imports

- Simplified error handling in `LoginPage` by removing the error parameter in the catch block.
- Removed unused import of `cn` in `KeyboardShortcutsModal` to clean up the code.
- Updated `UserPreferencesContext` to only destructure `status` from `useSession`, improving clarity.
- Refactored multiple methods in `UserPreferencesService` to eliminate unnecessary variable assignments, enhancing performance.
- Added ESLint directive to suppress unused variable warning for `NextAuth` import in type definitions.

src/types/next-auth.d.ts

@@ -1,4 +1,5 @@
-import NextAuth from "next-auth"
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+import type NextAuth from "next-auth"
 
 declare module "next-auth" {
   interface Session {