fix(pdf): make footer and all content stay compact and strictly within half-sheet area

lib/features/insurance_auth/services/insurance_auth_pdf_service.dart

@@ -74,9 +74,12 @@ class InsuranceAuthPdfService {
             crossAxisAlignment: pw.CrossAxisAlignment.stretch,
             children: [
               // Mitad superior de la hoja (máximo 5.5 pulgadas / 396 pt)
-              pw.Container(
-                height: 5.5 * PdfPageFormat.inch - 36,
+              pw.ConstrainedBox(
+                constraints: const pw.BoxConstraints(
+                  maxHeight: 5.5 * PdfPageFormat.inch - 36,
+                ),
                 child: pw.Column(
+                  mainAxisSize: pw.MainAxisSize.min,
                   crossAxisAlignment: pw.CrossAxisAlignment.stretch,
                   children: [
                     // 1. Cabecera con Nombre del Doctor y Badge Sutil de Hidalyx Med
@@ -207,10 +210,10 @@ class InsuranceAuthPdfService {
               pw.SizedBox(height: 8),
 
               // 3. Contenido Formal idéntico a AlfaMedical
-              pw.Expanded(
-                child: pw.Column(
-                  crossAxisAlignment: pw.CrossAxisAlignment.stretch,
-                  children: [
+              pw.Column(
+                crossAxisAlignment: pw.CrossAxisAlignment.stretch,
+                mainAxisSize: pw.MainAxisSize.min,
+                children: [
                     // Señores ARS
                     pw.RichText(
                       text: pw.TextSpan(
@@ -311,8 +314,14 @@ class InsuranceAuthPdfService {
                     ],
                   ],
                 ),
+              pw.SizedBox(height: 10),
+
+              // Línea divisoria decorativa previa al pie
+              pw.Container(
+                height: 0.5,
+                color: PdfColor.fromHex('CBD5E1'),
               ),
-              pw.SizedBox(height: 6),
+              pw.SizedBox(height: 5),
 
               // 4. Pie de página con Contacto del Consultorio
               if (generalContact.isNotEmpty) ...[