fix:Staging server error

Author: NishantGupt786

src/app/actions/get-papers-by-id.ts

@@ -1,21 +1,23 @@
 // "use server";
-import { ErrorResponse, PaperResponse } from "@/interface";
-import axios, { AxiosResponse } from "axios";
+import { ErrorResponse, type PaperResponse } from "@/interface";
+import axios, { type AxiosResponse } from "axios";
+
+export const fetchPaperID = async (id: string): Promise<PaperResponse> => {
+  const serverUrl = process.env.SERVER_URL ?? "https://papers.codechefvit.com";
 
-export const fetchPaperID = async (
-  id: string,
-) => {
   try {
-    if(!process.env.SERVER_URL)
-    {
-      throw "error env not set (server url)"
-    }
     const response: AxiosResponse<PaperResponse> = await axios.get(
-      `${process.env.SERVER_URL}/api/paper-by-id/${id}`,
+      `${serverUrl}/api/paper-by-id/${id}`
     );
     return response.data;
   } catch (err: unknown) {
-    throw err;
-  
+    if (axios.isAxiosError(err)) {
+      console.error("Axios error:", err.response?.data || err.message);
+      const errorMessage = (err.response?.data as { message?: string })?.message ?? "Failed to fetch paper";
+      throw new Error(errorMessage);
+    } else {
+      console.error("Unexpected error:", err);
+      throw new Error("An unexpected error occurred");
+    }
   }
 };

src/app/paper/[id]/page.tsx

@@ -3,9 +3,9 @@ import Footer from "@/components/Footer";
 import Navbar from "@/components/Navbar";
 import PdfViewer from "@/components/pdfViewer";
 import Loader from "@/components/ui/loader";
-import { ErrorResponse, PaperResponse } from "@/interface";
-import axios, { AxiosResponse } from "axios";
-import { Metadata } from "next";
+import { type ErrorResponse, type PaperResponse } from "@/interface";
+import axios, { type AxiosResponse } from "axios";
+import { type Metadata } from "next";
 import { redirect } from "next/navigation"; // Import redirect
 
 export async function generateMetadata({