refactor: anonymous/free chat experience

- Enhanced lambda function formatting in `_after_commit` for better clarity.
- Simplified generator expression in `_match_condition` for improved readability.
- Streamlined function signature in `_eligible` for consistency.
- Updated imports and refactored anonymous chat routes to use a new agent creation method.
- Added a new function `_load_anon_document` to handle document loading from Redis.
- Improved UI components by replacing legacy structures with modern alternatives, including alerts and separators.
- Refactored quota-related components to utilize new alert structures for better user feedback.
- Cleaned up unused variables and optimized component states for performance.

surfsense_web/contexts/anonymous-mode.tsx

@@ -9,6 +9,8 @@ export interface AnonymousModeContextValue {
 	setModelSlug: (slug: string) => void;
 	uploadedDoc: { filename: string; sizeBytes: number } | null;
 	setUploadedDoc: (doc: { filename: string; sizeBytes: number } | null) => void;
+	webSearchEnabled: boolean;
+	setWebSearchEnabled: (enabled: boolean) => void;
 	resetKey: number;
 	resetChat: () => void;
 }
@@ -34,6 +36,7 @@ export function AnonymousModeProvider({
 	const [uploadedDoc, setUploadedDoc] = useState<{ filename: string; sizeBytes: number } | null>(
 		null
 	);
+	const [webSearchEnabled, setWebSearchEnabled] = useState(true);
 	const [resetKey, setResetKey] = useState(0);
 
 	const resetChat = () => setResetKey((k) => k + 1);
@@ -56,10 +59,12 @@ export function AnonymousModeProvider({
 			setModelSlug,
 			uploadedDoc,
 			setUploadedDoc,
+			webSearchEnabled,
+			setWebSearchEnabled,
 			resetKey,
 			resetChat,
 		}),
-		[modelSlug, uploadedDoc, resetKey]
+		[modelSlug, uploadedDoc, webSearchEnabled, resetKey]
 	);
 
 	return <AnonymousModeContext.Provider value={value}>{children}</AnonymousModeContext.Provider>;