restore mime type logic but fix error

frontend/src/components/FileManager.tsx

@@ -130,6 +130,7 @@ const FileManager: React.FC<FileManagerProps> = ({ selectedTool }) => {
           onDrop={handleNewFileUpload}
           onDragEnter={() => setIsDragging(true)}
           onDragLeave={() => setIsDragging(false)}
+          accept="*/*"
           multiple={true}
           activateOnClick={false}
           style={{ 

frontend/src/components/fileManager/HiddenFileInput.tsx

@@ -9,6 +9,7 @@ const HiddenFileInput: React.FC = () => {
       ref={fileInputRef}
       type="file"
       multiple={true}
+      accept="*/*"
       onChange={onFileInputChange}
       style={{ display: 'none' }}
       data-testid="file-input"

frontend/src/components/shared/LandingPage.tsx

@@ -33,7 +33,7 @@ const LandingPage = () => {
       {/* White PDF Page Background */}
       <Dropzone
         onDrop={handleFileDrop}
-        accept={["application/pdf", "application/zip", "application/x-zip-compressed"]}
+        accept="*/*"
         multiple={true}
         className="w-4/5 flex items-center justify-center h-[95vh]"
         style={{
@@ -125,7 +125,7 @@ const LandingPage = () => {
               ref={fileInputRef}
               type="file"
               multiple
-              accept=".pdf,.zip"
+              accept="*/*"
               onChange={handleFileSelect}
               style={{ display: 'none' }}
             />