Update plugins/hammer.js

plugins/hammer.js

@@ -84,7 +84,16 @@ const handler = async (req, res) => {
     if (!model) {
       return res.status(400).json({
         success: false,
-        error: 'Missing required parameter: model (sleepy, sarah, myra, aiko)'
+        error: 'Missing required parameter: model',
+        availableModels: Object.keys(models)
+      });
+    }
+
+    if (!models[model.toLowerCase()]) {
+      return res.status(400).json({
+        success: false,
+        error: 'Invalid model',
+        availableModels: Object.keys(models)
       });
     }