Implement dynamic scripture loading from XML and fix theming for Learn screens

lib/screens/husband/_HusbandLearnScreen.dart

@@ -19,7 +19,7 @@ class _HusbandLearnScreen extends StatelessWidget {
               style: GoogleFonts.outfit(
                 fontSize: 28,
                 fontWeight: FontWeight.w600,
-                color: AppColors.navyBlue,
+                color: Theme.of(context).textTheme.displayMedium?.color,
               ),
             ),
             const SizedBox(height: 24),
@@ -94,14 +94,14 @@ class _HusbandLearnScreen extends StatelessWidget {
           style: GoogleFonts.outfit(
             fontSize: 14,
             fontWeight: FontWeight.w500,
-            color: AppColors.warmGray,
+            color: Theme.of(context).textTheme.bodySmall?.color,
             letterSpacing: 0.5,
           ),
         ),
         const SizedBox(height: 8),
         Container(
           decoration: BoxDecoration(
-            color: Colors.white,
+            color: Theme.of(context).cardTheme.color,
             borderRadius: BorderRadius.circular(12),
           ),
           child: Column(
@@ -111,12 +111,12 @@ class _HusbandLearnScreen extends StatelessWidget {
                         width: 40,
                         height: 40,
                         decoration: BoxDecoration(
-                          color: AppColors.navyBlue.withOpacity(0.1),
+                          color: Theme.of(context).colorScheme.primary.withOpacity(0.1),
                           borderRadius: BorderRadius.circular(10),
                         ),
                         child: Icon(
                           item.icon,
-                          color: AppColors.navyBlue,
+                          color: Theme.of(context).colorScheme.primary,
                           size: 20,
                         ),
                       ),
@@ -125,19 +125,19 @@ class _HusbandLearnScreen extends StatelessWidget {
                         style: GoogleFonts.outfit(
                           fontSize: 15,
                           fontWeight: FontWeight.w500,
-                          color: AppColors.charcoal,
+                          color: Theme.of(context).textTheme.bodyLarge?.color,
                         ),
                       ),
                       subtitle: Text(
                         item.subtitle,
                         style: GoogleFonts.outfit(
                           fontSize: 13,
-                          color: AppColors.warmGray,
+                          color: Theme.of(context).textTheme.bodyMedium?.color,
                         ),
                       ),
-                      trailing: const Icon(
+                      trailing: Icon(
                         Icons.chevron_right,
-                        color: AppColors.lightGray,
+                        color: Theme.of(context).disabledColor,
                       ),
                       onTap: () {
                         Navigator.push(