refactor: Update type annotations for database queries and improve button state handling in download page

src/app/api/complete-upload/route.ts

@@ -28,7 +28,7 @@ export async function POST(request: Request) {
 
     const connection = await pool.getConnection();
     try {
-      const [result]: any = await connection.query(
+      const [result]: [{ affectedRows: number }, unknown] = await connection.query(
         'UPDATE files SET token_hash = ?, expires_at = ? WHERE id = ?',
         [tokenHash, expiresAt, file_id]
       );

src/app/api/cron/cleanup/route.ts

@@ -1,6 +1,14 @@
 import { NextResponse } from 'next/server';
 import pool from '@/lib/db';
 
+interface FileId {
+  id: string;
+}
+
+interface FilePart {
+  discord_message_id: string | null;
+}
+
 if (!process.env.DISCORD_BOT_TOKEN || !process.env.DISCORD_CHANNEL_ID || !process.env.CRON_SECRET) {
   throw new Error('Discord or Cron secret environment variables are not configured');
 }
@@ -21,7 +29,7 @@ export async function POST(request: Request) {
       const staleTime = new Date();
       staleTime.setHours(staleTime.getHours() - 24); // Older than 24 hours
 
-      const [incompleteFiles]: any[] = await connection.query(
+      const [incompleteFiles]: [FileId[], unknown] = await connection.query(
         'SELECT id FROM files WHERE token_hash IS NULL AND upload_at <= ?',
         [staleTime]
       );
@@ -30,7 +38,7 @@ export async function POST(request: Request) {
         for (const file of incompleteFiles) {
           const file_id = file.id;
 
-          const [parts]: any[] = await connection.query('SELECT discord_message_id FROM file_parts WHERE file_id = ?', [file_id]);
+          const [parts]: [FilePart[], unknown] = await connection.query('SELECT discord_message_id FROM file_parts WHERE file_id = ?', [file_id]);
           
           if (parts.length > 0) {
             for (const part of parts) {
@@ -58,7 +66,7 @@ export async function POST(request: Request) {
       }
 
       // --- 2. Cleanup for EXPIRED files ---
-      const [expiredFiles]: any[] = await connection.query(
+      const [expiredFiles]: [FileId[], unknown] = await connection.query(
         'SELECT id FROM files WHERE expires_at <= NOW() AND deleted = 0'
       );
 
@@ -66,7 +74,7 @@ export async function POST(request: Request) {
         for (const file of expiredFiles) {
           const file_id = file.id;
 
-          const [partsRows]: any[] = await connection.query(
+          const [partsRows]: [FilePart[], unknown] = await connection.query(
             'SELECT discord_message_id FROM file_parts WHERE file_id = ?',
             [file_id]
           );

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

@@ -243,10 +243,10 @@ export default function DownloadPage() {
                                 {deleteState === 'idle' && (
                                     <button
                                         onClick={handleDelete}
-                                        disabled={downloadState === 'downloading' || downloadState === 'decrypting' || deleteState === 'deleting'}
+                                        disabled={downloadState === 'downloading' || downloadState === 'decrypting'}
                                         className="w-full bg-red-600 hover:bg-red-700 text-white font-bold py-3 px-4 rounded-lg transition duration-300 disabled:bg-gray-600 disabled:cursor-not-allowed"
                                     >
-                                        {deleteState === 'deleting' ? 'Deleting...' : 'Delete File'}
+                                        {'Delete File'}
                                     </button>
                                 )}
                                 {deleteState === 'deleting' && (