Add files via upload

admin-dashboard.html

@@ -495,7 +495,7 @@
     }, delay);
 }
 
-        // Override fetch to include token
+// Override fetch to include token (but NOT for FormData requests)
 const originalFetch = window.fetch;
 window.fetch = async function(resource, init = {}) {
     // Add token to headers if it's an API request
@@ -505,8 +505,8 @@
             headers.set('Authorization', `Bearer ${token}`);
         }
         
-                // Set content type if not set
-                if (!headers.has('Content-Type') && init.body) {
+        // Only set content type if not FormData (FormData sets its own)
+        if (!headers.has('Content-Type') && init.body && !(init.body instanceof FormData)) {
             headers.set('Content-Type', 'application/json');
         }
         
@@ -750,7 +750,7 @@
             console.log(key, value);
         }
         
-                // Create headers object
+        // Create headers object - DO NOT set Content-Type for FormData!
         const headers = {};
         
         // Add Authorization header if token exists
@@ -759,12 +759,10 @@
             headers['Authorization'] = `Bearer ${token}`;
         }
         
-                // Note: Don't set Content-Type header when using FormData with files
-                // The browser will set it automatically with the correct boundary
-                
+        // Send request with FormData (browser will set correct Content-Type with boundary)
         const response = await fetch('/api/banner/update', {
             method: 'POST',
-                    headers: headers,
+            headers: headers, // No Content-Type header!
             body: formData
         });