feat: switch dashboard login to Google OAuth only

Replace email/password form with Google sign-in button.
Uses Supabase OAuth with redirect to /dashboard/auth/callback.
Login page is now a client component for the OAuth flow.

Co-authored-by: dashboard <dashboard@miriad.systems>

Author: Miriad

app/(dashboard)/dashboard/login/page.tsx

@@ -1,81 +1,92 @@
-import { redirect } from "next/navigation";
-import { createClient } from "@/lib/supabase/server";
+"use client";
+
 import {
 	Card,
 	CardContent,
 	CardDescription,
 	CardHeader,
 	CardTitle,
 } from "@/components/ui/card";
-import { Input } from "@/components/ui/input";
-import { Label } from "@/components/ui/label";
 import { Button } from "@/components/ui/button";
+import { createClient } from "@/lib/supabase/client";
+import { useSearchParams } from "next/navigation";
+import { Suspense } from "react";
 
-export default async function LoginPage(props: {
-	searchParams: Promise<{ error?: string }>;
-}) {
-	const { error } = await props.searchParams;
-
-	async function signIn(formData: FormData) {
-		"use server";
+function GoogleIcon() {
+	return (
+		<svg className="h-5 w-5" viewBox="0 0 24 24">
+			<path
+				d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92a5.06 5.06 0 0 1-2.2 3.32v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.1z"
+				fill="#4285F4"
+			/>
+			<path
+				d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
+				fill="#34A853"
+			/>
+			<path
+				d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
+				fill="#FBBC05"
+			/>
+			<path
+				d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
+				fill="#EA4335"
+			/>
+		</svg>
+	);
+}
 
-		const email = formData.get("email") as string;
-		const password = formData.get("password") as string;
+function LoginForm() {
+	const searchParams = useSearchParams();
+	const error = searchParams.get("error");
 
-		const supabase = await createClient();
-		const { error } = await supabase.auth.signInWithPassword({
-			email,
-			password,
+	const handleGoogleSignIn = async () => {
+		const supabase = createClient();
+		await supabase.auth.signInWithOAuth({
+			provider: "google",
+			options: {
+				redirectTo: `${window.location.origin}/dashboard/auth/callback`,
+			},
 		});
-
-		if (error) {
-			redirect(`/dashboard/login?error=${encodeURIComponent(error.message)}`);
-		}
-
-		redirect("/dashboard");
-	}
+	};
 
 	return (
 		<div className="flex min-h-screen items-center justify-center bg-background">
 			<Card className="w-full max-w-sm">
-				<CardHeader>
+				<CardHeader className="text-center">
 					<CardTitle className="text-2xl">CodingCat.dev</CardTitle>
 					<CardDescription>
 						Sign in to the Content Ops Dashboard
 					</CardDescription>
 				</CardHeader>
 				<CardContent>
-					<form action={signIn} className="flex flex-col gap-4">
+					<div className="flex flex-col gap-4">
 						{error && (
 							<div className="rounded-md bg-destructive/10 p-3 text-sm text-destructive">
 								{error}
 							</div>
 						)}
-						<div className="flex flex-col gap-2">
-							<Label htmlFor="email">Email</Label>
-							<Input
-								id="email"
-								name="email"
-								type="email"
-								placeholder="admin@codingcat.dev"
-								required
-							/>
-						</div>
-						<div className="flex flex-col gap-2">
-							<Label htmlFor="password">Password</Label>
-							<Input
-								id="password"
-								name="password"
-								type="password"
-								required
-							/>
-						</div>
-						<Button type="submit" className="w-full">
-							Sign In
+						<Button
+							variant="outline"
+							className="w-full gap-2"
+							onClick={handleGoogleSignIn}
+						>
+							<GoogleIcon />
+							Sign in with Google
 						</Button>
-					</form>
+						<p className="text-center text-xs text-muted-foreground">
+							Access restricted to authorized accounts only.
+						</p>
+					</div>
 				</CardContent>
 			</Card>
 		</div>
 	);
 }
+
+export default function LoginPage() {
+	return (
+		<Suspense>
+			<LoginForm />
+		</Suspense>
+	);
+}