WIP frontend isn't completely broken now

Still more work left with integrating apalis and need to fully update
it.

These changes are mostly for fixing the frontend I broke by eagerly
updating everything.

frontend/js/index.ts

@@ -1,10 +1,5 @@
 import htmx from 'htmx.org';
 
-// import assets so they get named with a content hash that busts caches
-// import '../css/styles.css';
-
-import './localTimeController';
-
 declare global {
   interface Window {
     htmx: typeof htmx;
@@ -13,5 +8,16 @@ declare global {
 
 window.htmx = htmx;
 
-// eslint-disable-next-line import/first
-import 'htmx.org/dist/ext/sse';
+// Wait for htmx to be fully initialized before loading extensions
+document.addEventListener(
+  'htmx:load',
+  () => {
+    import('htmx.org/dist/ext/sse');
+  },
+  { once: true }
+);
+
+// import assets so they get named with a content hash that busts caches
+// import '../css/styles.css';
+
+import './localTimeController';