feat: update SEO titles and descriptions for improved clarity and focus

- Revised metadata titles and descriptions across multiple pages to better reflect the open-source and privacy-focused nature of SurfSense.
- Enhanced user engagement by simplifying titles for the free AI chat feature and individual model pages.

surfsense_web/app/(home)/free/[model_slug]/page.tsx

@@ -41,7 +41,7 @@ async function getAllModels(): Promise<AnonModel[]> {
 
 function buildSeoTitle(model: AnonModel): string {
 	if (model.seo_title) return model.seo_title;
-	return `${model.name} Free Online Without Login | No Sign-Up AI Chat | SurfSense`;
+	return `Chat with ${model.name} Free, No Login | SurfSense`;
 }
 
 function buildSeoDescription(model: AnonModel): string {

surfsense_web/app/(home)/free/page.tsx

@@ -18,7 +18,7 @@ import type { AnonModel } from "@/contracts/types/anonymous-chat.types";
 import { BACKEND_URL } from "@/lib/env-config";
 
 export const metadata: Metadata = {
-	title: "ChatGPT Free Online Without Login | Chat GPT No Login, Claude AI Free | SurfSense",
+	title: "Free AI Chat, No Login Required | SurfSense",
 	description:
 		"Use ChatGPT free online without login. Chat with GPT-4, Claude AI, Gemini and more for free. No sign-up required. Open source NotebookLM alternative with free AI chat and document Q&A.",
 	keywords: [
@@ -67,7 +67,7 @@ export const metadata: Metadata = {
 		canonical: "https://surfsense.com/free",
 	},
 	openGraph: {
-		title: "ChatGPT Free Online Without Login | Claude AI Free No Login | SurfSense",
+		title: "Free AI Chat, No Login Required | SurfSense",
 		description:
 			"Use ChatGPT free online without login. Chat with GPT-4, Claude AI, Gemini and 100+ AI models. Open source NotebookLM alternative.",
 		url: "https://surfsense.com/free",
@@ -84,7 +84,7 @@ export const metadata: Metadata = {
 	},
 	twitter: {
 		card: "summary_large_image",
-		title: "ChatGPT Free Online Without Login | Claude AI Free No Login | SurfSense",
+		title: "Free AI Chat, No Login Required | SurfSense",
 		description:
 			"Use ChatGPT free online without login. Chat with GPT-4, Claude AI, Gemini and more. No sign-up needed.",
 		images: ["/og-image.png"],

surfsense_web/app/layout.tsx

@@ -45,7 +45,7 @@ export const metadata: Metadata = {
 	alternates: {
 		canonical: "https://surfsense.com",
 	},
-	title: "SurfSense - NotebookLM Alternative | Free ChatGPT & Claude AI",
+	title: "SurfSense – Open Source, Privacy-Focused NotebookLM Alternative for Teams",
 	description:
 		"Open source NotebookLM alternative for teams with no data limits. Use ChatGPT, Claude AI, and any AI model for free.",
 	keywords: [
@@ -87,7 +87,7 @@ export const metadata: Metadata = {
 		"SurfSense",
 	],
 	openGraph: {
-		title: "SurfSense - NotebookLM Alternative | Free ChatGPT & Claude AI",
+		title: "SurfSense – Open Source, Privacy-Focused NotebookLM Alternative for Teams",
 		description:
 			"Open source NotebookLM alternative for teams with no data limits. Use ChatGPT, Claude, and any AI model for free.",
 		url: "https://surfsense.com",
@@ -105,7 +105,7 @@ export const metadata: Metadata = {
 	},
 	twitter: {
 		card: "summary_large_image",
-		title: "SurfSense - NotebookLM Alternative | Free ChatGPT & Claude AI",
+		title: "SurfSense – Open Source, Privacy-Focused NotebookLM Alternative for Teams",
 		description:
 			"Open source NotebookLM alternative for teams with no data limits. Use ChatGPT, Claude AI, and any AI model for free.",
 		creator: "@SurfSenseAI",