Added tab visibility context and provider for dynamic tab management

- Introduced TabVisibilityProvider component
- Created TabContent for conditional rendering
- Added context and hooks for tab visibility
- Updated DocumentManager dependencies
- Integrated provider in App component

lightrag_webui/src/contexts/context.ts

@@ -0,0 +1,12 @@
+import { createContext } from 'react';
+import { TabVisibilityContextType } from './types';
+
+// Default context value
+const defaultContext: TabVisibilityContextType = {
+  visibleTabs: {},
+  setTabVisibility: () => {},
+  isTabVisible: () => false,
+};
+
+// Create the context
+export const TabVisibilityContext = createContext<TabVisibilityContextType>(defaultContext);