feat: switch to a central singleton handler

This also adds support for Headscale TLS installations

app/routes/api/agent.ts

@@ -1,11 +1,10 @@
 import { LoaderFunctionArgs } from 'react-router';
-import type { AppContext } from '~server/context/app';
+import { hp_getSingleton, hp_getSingletonUnsafe } from '~server/context/global';
 
-export async function loader({
-	request,
-	context,
-}: LoaderFunctionArgs<AppContext>) {
-	if (!context?.agentData) {
+export async function loader({ request }: LoaderFunctionArgs) {
+	const data = hp_getSingletonUnsafe('ws_agent_data');
+
+	if (!data) {
 		return new Response(JSON.stringify({ error: 'Agent data unavailable' }), {
 			status: 400,
 			headers: {
@@ -25,13 +24,14 @@ export async function loader({
 		});
 	}
 
-	const entries = context.agentData.toJSON();
+	const entries = data.toJSON();
 	const missing = nodeIds.filter((nodeID) => !entries[nodeID]);
 	if (missing.length > 0) {
-		await context.hp_agentRequest(missing);
+		const requestCall = hp_getSingleton('ws_fetch_data');
+		requestCall(missing);
 	}
 
-	return new Response(JSON.stringify(context.agentData), {
+	return new Response(JSON.stringify(data), {
 		headers: {
 			'Content-Type': 'application/json',
 		},