refactor: Update type annotations and error handling for improved type safety in route and download components

src/app/api/delete/route.ts

@@ -1,7 +1,7 @@
 import { NextResponse } from 'next/server';
 import pool from '@/lib/db';
 import bcrypt from 'bcrypt';
-import { RowDataPacket, ResultSetHeader } from 'mysql2/promise';
+import { RowDataPacket } from 'mysql2/promise';
 
 interface FileData extends RowDataPacket {
   token_hash: string;

src/app/api/download-part/[file_id]/[part_index]/route.ts

@@ -7,19 +7,19 @@ interface FilePart extends RowDataPacket {
 }
 
 interface RouteContext {
-  params: {
+  params: Promise<{
     file_id: string;
     part_index: string;
-  };
+  }>;
 }
 
 if (!process.env.DISCORD_BOT_TOKEN || !process.env.DISCORD_CHANNEL_ID) {
   throw new Error('Discord bot token or channel ID is not configured');
 }
 
-export async function GET(request: NextRequest, context: { params: Record<string, string | string[]> }) {
+export async function GET(request: NextRequest, context: RouteContext) {
   try {
-    const { file_id, part_index } = params;
+    const { file_id, part_index } = await context.params;
 
     // NOTE: In a real-world scenario, you MUST validate if the user has permission to download this part.
     // This would involve checking the download_token against the hash in the `files` table.

src/app/api/file/[file_id]/route.ts

@@ -16,9 +16,15 @@ interface FilePartMetadata extends RowDataPacket {
   size: number;
 }
 
-export async function GET(request: NextRequest, { params }: { params: { file_id: string; } }) {
+interface RouteContext {
+  params: Promise<{
+    file_id: string;
+  }>;
+}
+
+export async function GET(request: NextRequest, context: RouteContext) {
   try {
-    const file_id = params.file_id;
+    const { file_id } = await context.params;
     const { searchParams } = new URL(request.url);
     const token = searchParams.get('token');
 

src/app/download/[file_id]/page.tsx

@@ -153,9 +153,8 @@ export default function DownloadPage() {
 
                 setDownloadState('complete');
 
-            } catch (e: any) {
+            } catch (e: unknown) {
-                setError(e.message || 'An unknown error occurred.');
+                setError(e instanceof Error ? e.message : 'An unknown error occurred.');                setDownloadState('error');
-                setDownloadState('error');
             }
         };
 
@@ -186,9 +185,9 @@ export default function DownloadPage() {
     
             setDeleteState('deleted');
     
-        } catch (e: any) {
+        } catch (e: unknown) {
             setDeleteState('error');
-            setDeleteError(e.message || 'An unknown error occurred during deletion.');
+            setDeleteError(e instanceof Error ? e.message : 'An unknown error occurred during deletion.');
         }
     };