Update app.py

app.py

@@ -162,11 +162,11 @@ async def main():
                 <form action="/analyze" method="post" enctype="multipart/form-data" 
                       onsubmit="document.getElementById('loading').style.display = 'block';">
                     <div>
-                        <input type="file" name="file" accept="image/*" required 
-                               onchange="document.getElementById('preview').src = window.URL.createObjectURL(this.files[0]); 
-                                        document.getElementById('preview').style.display = 'block';">
+                        <label for="file-upload" class="file-upload-label">
+                            Röntgenbild auswählen
+                        </label>
+                        <input id="file-upload" type="file" name="file" accept="image/*" required>
                     </div>
-                    <img id="preview" class="preview-image" src="" alt="Vorschau">
                     <button type="submit" class="button">
                         Analysieren
                     </button>