merge files inital commit

src/components/FileLoader.tsx

@@ -3,14 +3,14 @@ import type { PdfFile } from '../pdf/pdfTypes';
 
 interface FileLoaderProps {
   pdf: PdfFile | null;
-  onFileLoaded: (file: File) => void;
+  onFilesLoaded: (files: File[]) => void;
 }
 
-const FileLoader: React.FC<FileLoaderProps> = ({ pdf, onFileLoaded }) => {
+const FileLoader: React.FC<FileLoaderProps> = ({ pdf, onFilesLoaded }) => {
   const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    const file = e.target.files?.[0];
-    if (file) {
-      onFileLoaded(file);
+    const files = Array.from(e.target.files ?? []);
+    if (files.length > 0) {
+      onFilesLoaded(files);
       e.target.value = '';
     }
   };
@@ -18,8 +18,16 @@ const FileLoader: React.FC<FileLoaderProps> = ({ pdf, onFileLoaded }) => {
   return (
     <div className="card">
       <h2>1. Load PDF</h2>
-      <p>Select a PDF file. Processing happens entirely in your browser.</p>
-      <input type="file" accept="application/pdf" onChange={handleChange} />
+      <p>
+        Select one PDF to open it directly, or select several PDFs to place them
+        in the merge queue. Processing happens entirely in your browser.
+      </p>
+      <input
+        type="file"
+        accept="application/pdf"
+        multiple
+        onChange={handleChange}
+      />
 
       {pdf && (
         <div style={{ marginTop: '0.75rem', fontSize: '0.9rem' }}>