Move session management into session store

Trying to get rid of the redirect to signin on any page refresh

ts/components/layout/MainContent.vue

@@ -1,15 +1,9 @@
 <template>
 	<div id="content">
-		<div v-if="session.loading">Loading...</div>
-		<div v-else-if="session.error">Error: {{ session.error }}</div>
 		<slot />
 	</div>
 </template>
 
-<script setup lang="ts">
-import { useSessionStore } from "@/store/session";
-
-const session = useSessionStore();
-</script>
+<script setup lang="ts"></script>
 
 <style scoped></style>