refactor(selection-tools): remove redundant getPreferredLanguage calls

Author: AiraNadih

src/content-script/selection-tools/index.mjs

@@ -32,6 +32,10 @@ const createGenPrompt =
       fullMessage += `. If it is already in ${preferredLanguage}, translate it into English and only show me the translated content`
     }
 
+    const prefix = includeLanguagePrefix ? `Reply in ${preferredLanguage}.` : ''
+    return `${prefix}${fullMessage}:\n'''\n${selection}\n'''`
+  }
+
 export const config = {
   explain: {
     icon: <ChatText />,