feat: refine settings, stores, and message folders

src/plugins/built-in/messageFolders/lazy.ts

@@ -9,12 +9,6 @@ const settings = defineSettings({
     description:
       "When off, folder tags are not shown on the message list until you select a folder.",
   }),
-  hideFolderedMessagesInAll: booleanSetting({
-    default: true,
-    title: "Hide foldered messages in All Messages",
-    description:
-      "When on, messages assigned to a custom folder are hidden from the inbox until you open that folder.",
-  }),
 });
 
 export default defineLazyPlugin({