chore: Update .gitignore and add .idea folder, update npm dependencies, and improve code logic for chat history and knowledge export/import

src/entries/sidepanel/index.html

@@ -4,6 +4,7 @@
     <title>Page Assist - A Web UI for Local AI Models</title>
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="manifest.type" content="browser_action" />
+    <meta name="manifest.open_at_install" content="false" />
     <link href="~/assets/tailwind.css" rel="stylesheet" />
     <meta charset="utf-8" />
   </head>