Invoices can be uploaded

resources/js/components/ajaxHandler.js

@@ -8,6 +8,8 @@ export function useAjax() {
 
     async function request(url, options = {}) {
         loading.value = true
+        const isFormData = options.body instanceof FormData
+
         error.value = null
         data.value = null
 
@@ -15,14 +17,19 @@ export function useAjax() {
             const response = await fetch(url, {
                 method: options.method || "GET",
                 headers: {
-                    "Content-Type": "application/json",
                     'X-CSRF-TOKEN': csrfToken,
+                    ...(isFormData ? {} : { 'Content-Type': 'application/json' }),
                     ...(options.headers || {}),
                 },
-                body: options.body ? JSON.stringify(options.body) : null,
+                body: isFormData
+                    ? options.body          // ✅ FormData direkt
+                    : options.body
+                        ? JSON.stringify(options.body)
+                        : null,
             })
 
             if (!response.ok) throw new Error(`HTTP ${response.status}`)
+
             const result = await response.json()
             data.value = result
             return result
@@ -35,6 +42,7 @@ export function useAjax() {
         }
     }
 
+
     async function download(url, options = {}) {
         loading.value = true
         error.value = null