Initial commit of some work creating RMO single-page app

Doesn't work yet, but they both start, so checkpoint.

ts/AppSync.vue

@@ -0,0 +1,34 @@
+<template>
+	<div class="app-container">
+		<Sidebar v-if="$route.meta.showSidebar" />
+		<MainContent>
+			<div v-if="session.loading">Loading...</div>
+			<div v-else-if="session.error">Error: {{ session.error }}</div>
+			<router-view v-else />
+		</MainContent>
+	</div>
+</template>
+
+<script setup lang="ts">
+import { onMounted } from "vue";
+import { useSessionStore } from "@/store/session";
+import { Session } from "@/types";
+
+import Sidebar from "./components/layout/Sidebar.vue";
+import MainContent from "./components/layout/MainContent.vue";
+import NavigationLink from "@/components/common/NavigationLink.vue";
+
+const session = useSessionStore();
+onMounted(() => {
+	session.get().then((session: Session) => {
+		console.log("session loaded", session);
+	});
+});
+</script>
+
+<style scoped>
+.app-container {
+	display: flex;
+	height: 100vh;
+}
+</style>