implement auth error page and moved auth-related pages to /auth path

src/app/auth/error/page.tsx

@@ -0,0 +1,31 @@
+"use client"
+
+import { Button } from "@/components/ui/button"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import Link from "next/link"
+import { useSearchParams } from "next/navigation"
+
+export default function AuthErrorPage() {
+  const searchParams = useSearchParams()
+  const errorMessage = searchParams.get('error')
+
+  return (
+    <div className="min-h-screen flex items-center justify-center bg-background p-4">
+      <Card className="w-full max-w-md bg-red-400 dark:bg-red-600">
+        <CardHeader className="text-center">
+          <CardTitle className="text-2xl font-bold">Error</CardTitle>
+        </CardHeader>
+        <CardContent className="space-y-4">
+          <div className="text-center p-3 bg-background rounded-lg">
+            {errorMessage}
+          </div>
+          <div className="flex flex-row">
+            <Button variant="secondary" asChild>
+              <Link href="/">Go back to Homepage</Link>
+            </Button>
+          </div>
+        </CardContent>
+      </Card>
+    </div>
+  )
+}

src/app/components/sign-in.tsx

@@ -33,7 +33,7 @@ export default function SignIn() {
 
   return (
     <Button
-      onClick={() => router.push("/signin")} 
+      onClick={() => router.push("/auth/signin")}
       variant="outline"
       size="sm"
     >

src/app/page.tsx

@@ -254,7 +254,7 @@ export default function HomePage() {
             Sign in to unlock AI-powered calendar features
           </div>
           <Button variant="outline" size="sm" asChild>
-            <a href="/signin">Sign In</a>
+            <a href="/auth/signin">Sign In</a>
           </Button>
         </div>
       )}

src/auth.ts

@@ -25,9 +25,11 @@ const config = {
 	adapter: DrizzleAdapter(db),
 	providers,
 	pages: {
-		signIn: "/signin",
-		signOut: "/signout",
+		signIn: "/auth/signin",
+		signOut: "/auth/signout",
+		error: "/auth/error",
 	},
 	trustHost: true,
 } satisfies NextAuthConfig;
-export const { handlers, signIn, signOut, auth }: NextAuthResult = NextAuth(config);
+export const { handlers, signIn, signOut, auth }: NextAuthResult =
+	NextAuth(config);