Allow any file to be uploaded (#84)

## Summary

- Allow any file to be uploaded
- Removes .epub restriction

## Additional Context

- Fixes #74

src/activities/network/server/CrossPointWebServer.cpp

@@ -513,13 +513,6 @@ void CrossPointWebServer::handleUpload() {
     Serial.printf("[%lu] [WEB] [UPLOAD] START: %s to path: %s\n", millis(), uploadFileName.c_str(), uploadPath.c_str());
     Serial.printf("[%lu] [WEB] [UPLOAD] Free heap: %d bytes\n", millis(), ESP.getFreeHeap());
 
-    // Validate file extension
-    if (!isEpubFile(uploadFileName)) {
-      uploadError = "Only .epub files are allowed";
-      Serial.printf("[%lu] [WEB] [UPLOAD] REJECTED - not an epub file\n", millis());
-      return;
-    }
-
     // Create file path
     String filePath = uploadPath;
     if (!filePath.endsWith("/")) filePath += "/";

src/html/FilesPageFooter.html

@@ -3,15 +3,15 @@
       CrossPoint E-Reader • Open Source
     </p>
   </div>
-  
+
   <!-- Upload Modal -->
   <div class="modal-overlay" id="uploadModal">
     <div class="modal">
       <button class="modal-close" onclick="closeUploadModal()">&times;</button>
-      <h3>📤 Upload eBook</h3>
+      <h3>📤 Upload file</h3>
       <div class="upload-form">
-        <p class="file-info">Select an .epub file to upload to <strong id="uploadPathDisplay"></strong></p>
+        <p class="file-info">Select a file to upload to <strong id="uploadPathDisplay"></strong></p>
-        <input type="file" id="fileInput" accept=".epub" onchange="validateFile()">
+        <input type="file" id="fileInput" onchange="validateFile()">
         <button id="uploadBtn" class="upload-btn" onclick="uploadFile()" disabled>Upload</button>
         <div id="progress-container">
           <div id="progress-bar"><div id="progress-fill"></div></div>
@@ -20,7 +20,7 @@
       </div>
     </div>
   </div>
-  
+
   <!-- New Folder Modal -->
   <div class="modal-overlay" id="folderModal">
     <div class="modal">
@@ -33,7 +33,7 @@
       </div>
     </div>
   </div>
-  
+
   <!-- Delete Confirmation Modal -->
   <div class="modal-overlay" id="deleteModal">
     <div class="modal">
@@ -50,7 +50,7 @@
       </div>
     </div>
   </div>
-  
+
   <script>
     // Modal functions
     function openUploadModal() {
@@ -58,7 +58,7 @@
       document.getElementById('uploadPathDisplay').textContent = currentPath === '/' ? '/ 🏠' : currentPath;
       document.getElementById('uploadModal').classList.add('open');
     }
-    
+
     function closeUploadModal() {
       document.getElementById('uploadModal').classList.remove('open');
       document.getElementById('fileInput').value = '';
@@ -67,18 +67,18 @@
       document.getElementById('progress-fill').style.width = '0%';
       document.getElementById('progress-fill').style.backgroundColor = '#27ae60';
     }
-    
+
     function openFolderModal() {
       const currentPath = document.getElementById('currentPath').value;
       document.getElementById('folderPathDisplay').textContent = currentPath === '/' ? '/ 🏠' : currentPath;
       document.getElementById('folderModal').classList.add('open');
       document.getElementById('folderName').value = '';
     }
-    
+
     function closeFolderModal() {
       document.getElementById('folderModal').classList.remove('open');
     }
-    
+
     // Close modals when clicking overlay
     document.querySelectorAll('.modal-overlay').forEach(function(overlay) {
       overlay.addEventListener('click', function(e) {
@@ -87,58 +87,40 @@
         }
       });
     });
-    
+
     function validateFile() {
       const fileInput = document.getElementById('fileInput');
       const uploadBtn = document.getElementById('uploadBtn');
       const file = fileInput.files[0];
-      
+      uploadBtn.disabled = !file;
-      if (file) {
-        const fileName = file.name.toLowerCase();
-        if (!fileName.endsWith('.epub')) {
-          alert('Only .epub files are allowed!');
-          fileInput.value = '';
-          uploadBtn.disabled = true;
-          return;
-        }
-        uploadBtn.disabled = false;
-      } else {
-        uploadBtn.disabled = true;
-      }
     }
-    
+
     function uploadFile() {
       const fileInput = document.getElementById('fileInput');
       const file = fileInput.files[0];
       const currentPath = document.getElementById('currentPath').value;
-      
+
       if (!file) {
         alert('Please select a file first!');
         return;
       }
-      
+
-      const fileName = file.name.toLowerCase();
-      if (!fileName.endsWith('.epub')) {
-        alert('Only .epub files are allowed!');
-        return;
-      }
-      
       const formData = new FormData();
       formData.append('file', file);
-      
+
       const progressContainer = document.getElementById('progress-container');
       const progressFill = document.getElementById('progress-fill');
       const progressText = document.getElementById('progress-text');
       const uploadBtn = document.getElementById('uploadBtn');
-      
+
       progressContainer.style.display = 'block';
       uploadBtn.disabled = true;
-      
+
       const xhr = new XMLHttpRequest();
       // Include path as query parameter since multipart form data doesn't make
       // form fields available until after file upload completes
       xhr.open('POST', '/upload?path=' + encodeURIComponent(currentPath), true);
-      
+
       xhr.upload.onprogress = function(e) {
         if (e.lengthComputable) {
           const percent = Math.round((e.loaded / e.total) * 100);
@@ -146,7 +128,7 @@
           progressText.textContent = 'Uploading: ' + percent + '%';
         }
       };
-      
+
       xhr.onload = function() {
         if (xhr.status === 200) {
           progressText.textContent = 'Upload complete!';
@@ -159,39 +141,39 @@
           uploadBtn.disabled = false;
         }
       };
-      
+
       xhr.onerror = function() {
         progressText.textContent = 'Upload failed - network error';
         progressFill.style.backgroundColor = '#e74c3c';
         uploadBtn.disabled = false;
       };
-      
+
       xhr.send(formData);
     }
-    
+
     function createFolder() {
       const folderName = document.getElementById('folderName').value.trim();
       const currentPath = document.getElementById('currentPath').value;
-      
+
       if (!folderName) {
         alert('Please enter a folder name!');
         return;
       }
-      
+
       // Validate folder name (no special characters except underscore and hyphen)
       const validName = /^[a-zA-Z0-9_\-]+$/.test(folderName);
       if (!validName) {
         alert('Folder name can only contain letters, numbers, underscores, and hyphens.');
         return;
       }
-      
+
       const formData = new FormData();
       formData.append('name', folderName);
       formData.append('path', currentPath);
-      
+
       const xhr = new XMLHttpRequest();
       xhr.open('POST', '/mkdir', true);
-      
+
       xhr.onload = function() {
         if (xhr.status === 200) {
           window.location.reload();
@@ -199,14 +181,14 @@
           alert('Failed to create folder: ' + xhr.responseText);
         }
       };
-      
+
       xhr.onerror = function() {
         alert('Failed to create folder - network error');
       };
-      
+
       xhr.send(formData);
     }
-    
+
     // Delete functions
     function openDeleteModal(name, path, isFolder) {
       document.getElementById('deleteItemName').textContent = (isFolder ? '📁 ' : '📄 ') + name;
@@ -214,22 +196,22 @@
       document.getElementById('deleteItemType').value = isFolder ? 'folder' : 'file';
       document.getElementById('deleteModal').classList.add('open');
     }
-    
+
     function closeDeleteModal() {
       document.getElementById('deleteModal').classList.remove('open');
     }
-    
+
     function confirmDelete() {
       const path = document.getElementById('deleteItemPath').value;
       const itemType = document.getElementById('deleteItemType').value;
-      
+
       const formData = new FormData();
       formData.append('path', path);
       formData.append('type', itemType);
-      
+
       const xhr = new XMLHttpRequest();
       xhr.open('POST', '/delete', true);
-      
+
       xhr.onload = function() {
         if (xhr.status === 200) {
           window.location.reload();
@@ -238,12 +220,12 @@
           closeDeleteModal();
         }
       };
-      
+
       xhr.onerror = function() {
         alert('Failed to delete - network error');
         closeDeleteModal();
       };
-      
+
       xhr.send(formData);
     }
   </script>