feat: complete MVP foundation auth and dashboard

app/actions/auth.ts

@@ -0,0 +1,30 @@
+"use server";
+
+import { cookies } from "next/headers";
+import { redirect } from "next/navigation";
+
+import {
+  createClearedMockSessionCookie,
+  createMockSessionCookie,
+} from "@/lib/mock-auth";
+
+export async function signInMock() {
+  const cookieStore = await cookies();
+
+  cookieStore.set(createMockSessionCookie());
+  redirect("/dashboard");
+}
+
+export async function signUpMock() {
+  const cookieStore = await cookies();
+
+  cookieStore.set(createMockSessionCookie());
+  redirect("/dashboard");
+}
+
+export async function signOutMock() {
+  const cookieStore = await cookies();
+
+  cookieStore.set(createClearedMockSessionCookie());
+  redirect("/");
+}