feat: add supportsLatest getter for JS

lib/eval/javascript/service.dart

@@ -31,6 +31,9 @@ class MProvider {
     get source() {
         return JSON.parse('${jsonEncode(source!.toMSource().toJson())}');
     }
+    get supportsLatest() {
+        throw new Error("supportsLatest not implemented");
+    }
     getHeaders(url) {
         throw new Error("getHeaders not implemented");
     }
@@ -81,6 +84,17 @@ var extention = new DefaultExtension();
     }
   }
 
+  bool get supportsLatest {
+    _init();
+    try {
+      return jsonDecode(runtime
+          .evaluate('JSON.stringify(extention.supportsLatest)')
+          .stringResult) as bool;
+    } catch (e) {
+      return true;
+    }
+  }
+
   Future<MPages> getPopular(int page) async {
     _init();
     final res = (await runtime.handlePromise(await runtime

lib/modules/browse/extension/widgets/create_extension.dart

@@ -301,6 +301,9 @@ class DefaultExtension extends MProvider {
     async getPopular(page) {
         throw new Error("getPopular not implemented");
     }
+    get supportsLatest() {
+        throw new Error("supportsLatest not implemented");
+    }
     async getLatestUpdates(page) {
         throw new Error("getLatestUpdates not implemented");
     }

lib/services/supports_latest.dart

@@ -1,4 +1,5 @@
 import 'package:mangayomi/eval/dart/service.dart';
+import 'package:mangayomi/eval/javascript/service.dart';
 import 'package:mangayomi/models/source.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -10,7 +11,7 @@ bool supportsLatest(Ref ref, {required Source source}) {
   if (source.sourceCodeLanguage == SourceCodeLanguage.dart) {
     supportsLatest = DartExtensionService(source).supportsLatest;
   } else {
-    supportsLatest = true;
+    supportsLatest = JsExtensionService(source).supportsLatest;
   }
   return supportsLatest;
 }