Added an error message when API key is not set.

manifest.json

@@ -42,5 +42,5 @@
   "manifest_version": 3,
   "name": "LeafLLM",
   "homepage_url": "https://github.com/achiyae/LeafLLM",
-  "version": "1.2.2"
+  "version": "1.2.3"
 }

scripts/content.js

@@ -181,6 +181,8 @@ chrome.runtime.onMessage.addListener(
           setAPIKey(openAIAPIKey)
           if (openAI) {
             handleCommand(request.command)
+          } else {
+            error('OpenAI API key is not set, LeafLLM features are disabled.')
           }
         })
       } else {