Add the old loadRequired

lib/mod_list.dart

@@ -397,13 +397,69 @@ class ModList {
     });
   }
 
-  LoadOrder loadRequired() {
-    final loadOrder = generateLoadOrder();
-    for (final modId in loadOrder.order.map((e) => e.id)) {
-      setEnabled(modId, true);
+  LoadOrder loadDependencies(
+    String modId, [
+    LoadOrder? loadOrder,
+    List<String>? toEnable,
+    Map<String, bool>? seen,
+    List<String>? cyclePath,
+  ]) {
+    final mod = mods[modId]!;
+    loadOrder ??= LoadOrder();
+    toEnable ??= <String>[];
+    seen ??= <String, bool>{};
+    cyclePath ??= <String>[];
+
+    // Add current mod to cycle path
+    cyclePath.add(modId);
+
+    for (final dep in mod.dependencies) {
+      if (!mods.containsKey(dep)) {
+        loadOrder.errors.add(
+          'Missing dependency: ${mod.name} requires mod with ID $dep',
+        );
+        continue;
+      }
+      final depMod = mods[dep]!;
+      if (seen[dep] == true) {
+        // Find the start of the cycle
+        int cycleStart = cyclePath.indexOf(dep);
+        if (cycleStart >= 0) {
+          // Extract the cycle part
+          List<String> cycleIds = [...cyclePath.sublist(cycleStart), modId];
+          loadOrder.errors.add(
+            'Cyclic dependency detected: ${cycleIds.join(' -> ')}',
+          );
+        } else {
+          loadOrder.errors.add('Cyclic dependency detected: $modId -> $dep');
+        }
+        continue;
+      }
+      seen[dep] = true;
+      toEnable.add(depMod.id);
+      loadDependencies(
+        depMod.id,
+        loadOrder,
+        toEnable,
+        seen,
+        List.from(cyclePath),
+      );
     }
+
     return loadOrder;
   }
+
+  LoadOrder loadRequired([LoadOrder? loadOrder]) {
+    loadOrder ??= LoadOrder();
+    final toEnable = <String>[];
+    for (final modid in activeMods.keys) {
+      loadDependencies(modid, loadOrder, toEnable);
+    }
+    for (final modid in toEnable) {
+      setEnabled(modid, true);
+    }
+    return generateLoadOrder(loadOrder);
+  }
 }
 
 String _expansionNameFromId(String id) {