Add diploma/certificate upload to professional request form (required field)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/ui/views/request_professional_view.dart

@@ -72,6 +72,7 @@ class _FormBodyState extends State<_FormBody> {
   bool _loading = false;
   bool _cedulaError = false;
   bool _cedulaNumError = false;
+  bool _certError = false;
   bool _profError = false;
 
   @override
@@ -92,22 +93,25 @@ class _FormBodyState extends State<_FormBody> {
     }
   }
 
-  bool _validate(String cedulaUrl) {
+  bool _validate(String cedulaUrl, String certUrl) {
     final cErr = cedulaUrl.isEmpty;
     final nErr = _cedulaNumCtrl.text.trim().isEmpty;
+    final dErr = certUrl.isEmpty;
     final pErr = _selectedProfession == null || _selectedProfession!.isEmpty;
     setState(() {
       _cedulaError = cErr;
       _cedulaNumError = nErr;
+      _certError = dErr;
       _profError = pErr;
     });
-    return !cErr && !nErr && !pErr;
+    return !cErr && !nErr && !dErr && !pErr;
   }
 
   Future<void> _submit() async {
     final fp = context.read<ProfessionalFormProvider>();
     final cedulaUrl = fp.profesional?.identificationPicture ?? '';
-    if (!_validate(cedulaUrl)) return;
+    final certUrl = fp.profesional?.certificatePicture ?? '';
+    if (!_validate(cedulaUrl, certUrl)) return;
 
     setState(() => _loading = true);
     try {
@@ -199,6 +203,8 @@ class _FormBodyState extends State<_FormBody> {
 
     final cedulaUploaded =
         (fp.profesional?.identificationPicture ?? '').isNotEmpty;
+    final certUploaded =
+        (fp.profesional?.certificatePicture ?? '').isNotEmpty;
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
@@ -293,7 +299,38 @@ class _FormBodyState extends State<_FormBody> {
 
         const SizedBox(height: 10),
 
-        // ── 2. Profesión (obligatorio) ──────────────────────────────────────
+        // ── 2. Diploma / Certificado (obligatorio) ─────────────────────────
+        _SectionCard(
+          cardBg: cardBg,
+          border: border,
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              _Label('Diploma o certificado profesional', Icons.school_outlined, required: true),
+              const SizedBox(height: 4),
+              Text(
+                'Sube el diploma, acta de grado o tarjeta profesional',
+                style: TextStyle(fontSize: 11, color: textSec),
+              ),
+              const SizedBox(height: 10),
+              _UploadTile(
+                label: certUploaded ? 'Documento subido ✓' : 'Subir diploma / certificado (PDF o imagen)',
+                uploaded: certUploaded,
+                onTap: () => _pickAndUpload((b) => fp.uploadPdfCertificate(b, user.id)),
+              ),
+              if (_certError)
+                const Padding(
+                  padding: EdgeInsets.only(top: 8),
+                  child: Text('Debes subir el diploma o certificado',
+                      style: TextStyle(color: Colors.redAccent, fontSize: 12)),
+                ),
+            ],
+          ),
+        ),
+
+        const SizedBox(height: 10),
+
+        // ── 4. Profesión (obligatorio) ──────────────────────────────────────
         _SectionCard(
           cardBg: cardBg,
           border: border,