feat(onboarding): add step-login replacing sso-gate

src/features/onboarding/steps/step-login.tsx

@@ -0,0 +1,159 @@
+"use client";
+
+import { useOnboarding } from "@onboardjs/react";
+import { useMutation } from "@tanstack/react-query";
+import { z } from "zod";
+import { toast } from "sonner";
+import { Globe, Mail } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { PasswordInput } from "@/components/ui/password-input";
+import {
+    useZodForm,
+    Form,
+    FormField,
+    FormItem,
+    FormLabel,
+    FormControl,
+    FormMessage,
+} from "@/components/ui/form";
+import { signIn } from "@/lib/auth/auth-client";
+import type { OnboardingMeta } from "@/features/onboarding/onboarding.types";
+
+const LoginSchema = z.object({
+    email: z.string().email("Invalid email"),
+    password: z.string().min(1, "Password required"),
+});
+
+type LoginValues = z.infer<typeof LoginSchema>;
+
+export const StepLogin = () => {
+    const { next, state } = useOnboarding();
+    const meta = state?.context.flowData.meta as OnboardingMeta | undefined;
+
+    const form = useZodForm({ schema: LoginSchema });
+
+    const loginMutation = useMutation({
+        mutationFn: async (values: LoginValues) => {
+            const result = await signIn.email(
+                { email: values.email, password: values.password },
+                {
+                    onSuccess: async () => {
+                        await next();
+                    },
+                    onError: (error) => {
+                        toast.error(error.error.message);
+                    },
+                }
+            );
+            return result;
+        },
+    });
+
+    const handleSso = async (providerId: string) => {
+        await signIn.social({ provider: providerId as any });
+    };
+
+    // Case 1: No existing users — registration flow (SSO or continue to account-info)
+    if (!meta?.hasExistingUsers) {
+        return (
+            <div className="flex flex-col gap-4">
+                <div>
+                    <h1 className="text-2xl font-semibold">Welcome to Portabase</h1>
+                    <p className="text-sm text-muted-foreground mt-1">
+                        Set up your instance by creating the first account.
+                    </p>
+                </div>
+                {meta?.ssoProviders && meta.ssoProviders.length > 0 && (
+                    <div className="flex flex-col gap-2">
+                        {meta.ssoProviders.map((provider) => (
+                            <button
+                                key={provider.id}
+                                type="button"
+                                onClick={() => handleSso(provider.id)}
+                                className="flex items-center gap-3 rounded-lg border border-border p-3 text-sm hover:bg-accent/50 hover:border-primary/20 transition-colors w-full"
+                            >
+                                <div className="size-9 rounded-md border bg-muted/50 shadow-sm flex items-center justify-center shrink-0">
+                                    <Globe className="size-4 text-muted-foreground" />
+                                </div>
+                                <span>Continue with {provider.label}</span>
+                            </button>
+                        ))}
+                    </div>
+                )}
+                <Button type="button" onClick={() => next()}>
+                    <Mail className="size-4 mr-2" />
+                    Register with email
+                </Button>
+            </div>
+        );
+    }
+
+    // Case 2 & 3: Login form (default user mode or session expired resume)
+    return (
+        <div className="flex flex-col gap-4">
+            <div>
+                <h1 className="text-2xl font-semibold">Welcome back</h1>
+                <p className="text-sm text-muted-foreground mt-1">
+                    {meta?.defaultUserMode
+                        ? "Sign in to continue onboarding."
+                        : "Your session expired. Sign in to continue where you left off."}
+                </p>
+            </div>
+            {meta?.ssoProviders && meta.ssoProviders.length > 0 && !meta.defaultUserMode && (
+                <div className="flex flex-col gap-2">
+                    {meta.ssoProviders.map((provider) => (
+                        <button
+                            key={provider.id}
+                            type="button"
+                            onClick={() => handleSso(provider.id)}
+                            className="flex items-center gap-3 rounded-lg border border-border p-3 text-sm hover:bg-accent/50 hover:border-primary/20 transition-colors w-full"
+                        >
+                            <div className="size-9 rounded-md border bg-muted/50 shadow-sm flex items-center justify-center shrink-0">
+                                <Globe className="size-4 text-muted-foreground" />
+                            </div>
+                            <span>Continue with {provider.label}</span>
+                        </button>
+                    ))}
+                </div>
+            )}
+            <Form
+                form={form}
+                className="flex flex-col gap-4"
+                onSubmit={async (values) => loginMutation.mutateAsync(values)}
+            >
+                <FormField
+                    control={form.control}
+                    name="email"
+                    defaultValue=""
+                    render={({ field }) => (
+                        <FormItem>
+                            <FormLabel>Email</FormLabel>
+                            <FormControl>
+                                <Input placeholder="your@email.com" {...field} />
+                            </FormControl>
+                            <FormMessage />
+                        </FormItem>
+                    )}
+                />
+                <FormField
+                    control={form.control}
+                    name="password"
+                    defaultValue=""
+                    render={({ field }) => (
+                        <FormItem>
+                            <FormLabel>Password</FormLabel>
+                            <FormControl>
+                                <PasswordInput placeholder="Your password" {...field} />
+                            </FormControl>
+                            <FormMessage />
+                        </FormItem>
+                    )}
+                />
+                <Button type="submit" disabled={loginMutation.isPending}>
+                    Sign in
+                </Button>
+            </Form>
+        </div>
+    );
+};