feat(chat): add RemoveAdsBanner component to FreeChatPage

- Integrated the RemoveAdsBanner component into the FreeChatPage to enhance user experience by providing ad-free interaction.

surfsense_web/components/free-chat/free-chat-page.tsx

@@ -37,6 +37,7 @@ import { BACKEND_URL } from "@/lib/env-config";
 import { trackAnonymousChatMessageSent } from "@/lib/posthog/events";
 import { FreeModelSelector } from "./free-model-selector";
 import { FreeThread } from "./free-thread";
+import { RemoveAdsBanner } from "./remove-ads-banner";
 
 // Render all tool calls via ToolFallback; backend keeps persisted
 // payloads bounded by summarising / truncating outputs.
@@ -135,7 +136,7 @@ export function FreeChatPage() {
 		pendingRetryRef.current = null;
 	}, [resetKey, modelSlug, tokenUsageStore]);
 
-	const cancelRun = useCallback(() => {
+	const cancelRun = useCallback(async () => {
 		if (abortControllerRef.current) {
 			abortControllerRef.current.abort();
 			abortControllerRef.current = null;
@@ -487,6 +488,8 @@ export function FreeChatPage() {
 						<FreeModelSelector />
 					</div>
 
+					<RemoveAdsBanner />
+
 					{captchaRequired && TURNSTILE_SITE_KEY && (
 						<div className="flex justify-center border-b bg-muted/30 px-4 py-4">
 							<Alert className="w-auto max-w-md">

surfsense_web/components/free-chat/remove-ads-banner.tsx

@@ -0,0 +1,77 @@
+"use client";
+
+import { Sparkles, X } from "lucide-react";
+import Link from "next/link";
+import { useEffect, useState } from "react";
+import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
+import { Button } from "@/components/ui/button";
+import { cn } from "@/lib/utils";
+
+const ADSENSE_CLIENT_ID = process.env.NEXT_PUBLIC_GOOGLE_ADSENSE_CLIENT_ID;
+
+// Versioned key so the copy can change later without resurfacing for users who
+// already dismissed an older variant (bump the version to re-show).
+const DISMISS_KEY = "surfsense:remove-ads-banner-dismissed:v1";
+
+/**
+ * Dismissible promo shown on the free /free/[model_slug] chat pages, nudging
+ * anonymous users to sign up to remove ads. Dismissal is persisted in
+ * localStorage so it stays hidden across reloads and navigations. The free
+ * chat keeps working whether or not the banner is dismissed.
+ *
+ * Renders nothing when AdSense is not configured (dev/preview), since there are
+ * no ads to remove in that case.
+ */
+export function RemoveAdsBanner({ className }: { className?: string }) {
+	// Default hidden so dismissed users never see a flash before the stored
+	// value is read on the client (avoids a hydration/flicker mismatch).
+	const [dismissed, setDismissed] = useState(true);
+
+	useEffect(() => {
+		try {
+			setDismissed(localStorage.getItem(DISMISS_KEY) === "1");
+		} catch {
+			// localStorage can throw in private browsing / when disabled.
+			setDismissed(false);
+		}
+	}, []);
+
+	const handleDismiss = () => {
+		setDismissed(true);
+		try {
+			localStorage.setItem(DISMISS_KEY, "1");
+		} catch {
+			// Ignore: dismissal just won't persist across reloads.
+		}
+	};
+
+	if (!ADSENSE_CLIENT_ID || dismissed) return null;
+
+	return (
+		<div className={cn("shrink-0 border-b bg-muted/30 px-4 py-3", className)}>
+			<Alert className="relative mx-auto w-full max-w-2xl pr-10">
+				<Sparkles />
+				<AlertTitle>Go ad-free with a free account</AlertTitle>
+				<AlertDescription>
+					<p>
+						Create a free SurfSense account to remove ads, unlock $5 of premium credit, and save
+						your chat history. You can keep chatting for free either way.
+					</p>
+					<Button asChild size="sm" className="mt-1">
+						<Link href="/login">Create Free Account</Link>
+					</Button>
+				</AlertDescription>
+				<Button
+					type="button"
+					variant="ghost"
+					size="icon"
+					onClick={handleDismiss}
+					aria-label="Dismiss"
+					className="absolute top-2 right-2 size-6"
+				>
+					<X />
+				</Button>
+			</Alert>
+		</div>
+	);
+}