Update Careers submission to use FormData for resume upload

src/App.jsx

@@ -2573,33 +2573,27 @@ export default function App({ previewMode = false }) {
                     setCareersErrorMsg('');
 
                     try {
+                      const uploadData = new FormData();
+                      uploadData.append('type', 'careers');
+                      uploadData.append('name', careersName);
+                      uploadData.append('email', careersEmail);
+                      uploadData.append('phone', careersPhone);
+                      if (careersFile) {
+                        uploadData.append('resume', careersFile);
+                        uploadData.append('resumeName', careersFile.name);
+                      }
+                      uploadData.append('message', `New Careers Application from ${careersName}`);
+                      uploadData.append('turnstileToken', careersTurnstileToken);
+
                       let response = await fetch('/api/contact', {
                         method: 'POST',
-                        headers: { 'Content-Type': 'application/json' },
+                        body: uploadData
-                        body: JSON.stringify({
-                          type: 'careers',
-                          name: careersName,
-                          email: careersEmail,
-                          phone: careersPhone,
-                          resumeName: careersFile ? careersFile.name : 'None',
-                          message: `New Careers Application from ${careersName}`,
-                          turnstileToken: careersTurnstileToken
-                        })
                       });
 
                       if (!response.ok) {
                         response = await fetch('/api/send', {
                           method: 'POST',
-                          headers: { 'Content-Type': 'application/json' },
+                          body: uploadData
-                          body: JSON.stringify({
-                            type: 'careers',
-                            name: careersName,
-                            email: careersEmail,
-                            phone: careersPhone,
-                            resumeName: careersFile ? careersFile.name : 'None',
-                            message: `New Careers Application from ${careersName}`,
-                            turnstileToken: careersTurnstileToken
-                          })
                         });
                       }