Add @langchain/core dependency and update imports***

***Update SidepanelRouting to use dark mode***
***Add image support to PlaygroundMessage component

src/routes/index.tsx

@@ -1,14 +1,19 @@
 import { Route, Routes } from "react-router-dom"
 import { SidepanelChat } from "./sidepanel-chat"
 import { SidepanelSettingsHeader } from "~components/Sidepanel/Settings/header"
+import { useDarkMode } from "~hooks/useDarkmode"
 
 export const Routing = () => <Routes></Routes>
 
-export const SidepanelRouting = () => (
-  <div className="dark">
-    <Routes>
-      <Route path="/" element={<SidepanelChat />} />
-      <Route path="/settings" element={<SidepanelSettingsHeader />} />  
-    </Routes>
-  </div>
-)
+export const SidepanelRouting = () => {
+  const { mode } = useDarkMode()
+
+  return (
+    <div className={mode === "dark" ? "dark" : "light"}>
+      <Routes>
+        <Route path="/" element={<SidepanelChat />} />
+        <Route path="/settings" element={<SidepanelSettingsHeader />} />
+      </Routes>
+    </div>
+  )
+}