Initial commit from ux_aura_assistant

containers/MainContainer.tsx

@@ -0,0 +1,44 @@
+import React, { useState, useEffect } from 'react';
+import { useTheme } from '../contexts/ThemeContext';
+import { User } from '../types';
+import MainLayout from './layout/MainLayout';
+
+interface MainContainerProps {
+    user: User | null;
+    workspaceUrl: string;
+    signOutUrl: string;
+    children?: React.ReactNode;
+}
+
+/**
+ * MainContainer handles layout logic:
+ * - Theme state access
+ * - App version fetching
+ */
+const MainContainer: React.FC<MainContainerProps> = (props) => {
+    const { theme, toggleTheme } = useTheme();
+    const [version, setVersion] = useState<string | null>(null);
+
+    useEffect(() => {
+        fetch('./version.json')
+            .then(response => {
+                if (response.ok) return response.json();
+                return null;
+            })
+            .then(data => {
+                if (data && data.version) setVersion(data.version);
+            })
+            .catch(() => {});
+    }, []);
+    
+    return (
+        <MainLayout 
+            {...props} 
+            theme={theme} 
+            toggleTheme={toggleTheme} 
+            version={version} 
+        />
+    );
+};
+
+export default MainContainer;