feat: Enhance validation logic and error messaging in personal sign contract page + send dummy pdf file not txt

src/app/quickaction-dashboard/register-sign-contract/personal/page.tsx

@@ -26,17 +26,28 @@ export default function PersonalSignContractPage() {
     setDate(new Date().toISOString().slice(0, 10))
   }, [])
 
-  const valid = () =>
+  const valid = () => {
-    fullName.trim().length > 4 &&
+    const nameValid = fullName.trim().length >= 3 // Min 3 characters for name
-    location.trim().length > 1 &&
+    const locationValid = location.trim().length >= 2 // Min 2 characters for location
-    agreeContract &&
+    const contractChecked = agreeContract
-    agreeData &&
+    const dataChecked = agreeData
-    confirmSignature
+    const signatureChecked = confirmSignature
+    
+    return nameValid && locationValid && contractChecked && dataChecked && signatureChecked
+  }
 
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault()
     if (!valid()) {
-      setError('Bitte alle Pflichtfelder & Bestätigungen ausfüllen.')
+      // Detailed error message to help debug
+      const issues = []
+      if (fullName.trim().length < 3) issues.push('Vollständiger Name (mindestens 3 Zeichen)')
+      if (location.trim().length < 2) issues.push('Ort (mindestens 2 Zeichen)')
+      if (!agreeContract) issues.push('Vertrag gelesen und verstanden')
+      if (!agreeData) issues.push('Datenschutzerklärung zugestimmt')
+      if (!confirmSignature) issues.push('Elektronische Signatur bestätigt')
+      
+      setError(`Bitte vervollständigen: ${issues.join(', ')}`)
       return
     }
     
@@ -65,9 +76,10 @@ export default function PersonalSignContractPage() {
       // Create FormData for the existing backend endpoint
       const formData = new FormData()
       formData.append('contractData', JSON.stringify(contractData))
-      // Create a dummy file since the backend expects one (we'll update backend later)
+      // Create a dummy PDF file since the backend expects one (electronic signature)
-      const dummyFile = new Blob(['Electronic signature data'], { type: 'text/plain' })
+      const dummyPdfContent = '%PDF-1.4\n1 0 obj\n<<\n/Type /Catalog\n/Pages 2 0 R\n>>\nendobj\n2 0 obj\n<<\n/Type /Pages\n/Kids [3 0 R]\n/Count 1\n>>\nendobj\n3 0 obj\n<<\n/Type /Page\n/Parent 2 0 R\n/MediaBox [0 0 612 792]\n/Contents 4 0 R\n>>\nendobj\n4 0 obj\n<<\n/Length 44\n>>\nstream\nBT\n/F1 12 Tf\n100 700 Td\n(Electronic Signature) Tj\nET\nendstream\nendobj\nxref\n0 5\n0000000000 65535 f \n0000000010 00000 n \n0000000079 00000 n \n0000000136 00000 n \n0000000225 00000 n \ntrailer\n<<\n/Size 5\n/Root 1 0 R\n>>\nstartxref\n319\n%%EOF'
-      formData.append('contract', dummyFile, 'electronic_signature.txt')
+      const dummyFile = new Blob([dummyPdfContent], { type: 'application/pdf' })
+      formData.append('contract', dummyFile, 'electronic_signature.pdf')
 
       const response = await fetch(`${process.env.NEXT_PUBLIC_API_BASE_URL}/api/upload/contract/personal`, {
         method: 'POST',