refactor(launcher): remove duplicate session load from menu_session_list

On session click/hover, the menu was calling load_ae_obj_id__event_session
directly AND then navigating via goto(), which re-runs +page.ts and calls
it again. Both fired concurrently on cold cache, causing two identical API
requests for the same session.

Fix: remove the direct load call entirely. The goto() promise is assigned
to ae_promises.slct__event_session_id so the existing #await spinner still
works — it now reflects actual navigation + page.ts load time rather than
a redundant parallel fetch. Remove events_func and ae_api imports (unused).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/routes/events/[event_id]/(launcher)/menu_session_list.svelte

@@ -79,7 +79,6 @@ import {
     ae_snip,
     ae_loc,
     ae_sess,
-    ae_api,
     ae_trig,
     slct,
     slct_trigger
@@ -90,7 +89,6 @@ import {
     events_slct,
     events_trigger
 } from '$lib/stores/ae_events_stores';
-import { events_func } from '$lib/ae_events/ae_events_functions';
 import {
     CalendarCheck,
     CalendarDays,
@@ -142,26 +140,26 @@ $effect(() => {
                 slct__event_session_id = event_session_id;
             }
 
-            // 3. Background Data Fetch
+            // 3. Remote Control Sync
-            handle_load_ae_obj_id__event_session(event_session_id);
-
-            // 4. Remote Control Sync
             if ($events_loc.launcher.controller == 'local_push') {
                 $events_sess.launcher.controller_cmd = `ae_load:event_session=${event_session_id}`;
                 $events_sess.launcher.controller_trigger_send = true;
             }
 
-            // 5. URL Navigation
+            // 4. URL Navigation — the single load fires from +page.ts when the URL updates.
+            // Assigning the goto promise to ae_promises drives the #await spinner in the template.
+            loading__session_id_status = 'loading';
             let new_url_obj = new URL(page.url);
             new_url_obj.searchParams.set('session_id', event_session_id);
 
             if (log_lvl) console.log(`[UI Trace] Initiating SvelteKit goto...`);
 
-            goto(new_url_obj.toString(), {
+            ae_promises.slct__event_session_id = goto(new_url_obj.toString(), {
                 replaceState: false,
                 noScroll: true,
                 keepFocus: true
             }).then(() => {
+                loading__session_id_status = false;
                 if (log_lvl)
                     console.log(
                         `🏁 [Trace] Navigation Roundtrip: ${(performance.now() - start).toFixed(2)}ms`
@@ -170,45 +168,6 @@ $effect(() => {
         });
     }
 });
-
-function handle_load_ae_obj_id__event_session(event_session_id: any) {
-    const start = performance.now();
-    if (log_lvl) {
-        console.log(
-            `[UI Trace] handle_load_ae_obj_id__event_session: Calling library for id=${event_session_id}`
-        );
-    }
-
-    loading__session_id_status = 'loading';
-
-    ae_promises.slct__event_session_id = events_func
-        .load_ae_obj_id__event_session({
-            api_cfg: $ae_api,
-            event_session_id: event_session_id,
-            inc_file_li: true,
-            inc_all_file_li: true,
-            inc_presentation_li: true,
-            inc_presenter_li: true,
-            log_lvl: log_lvl
-        })
-        .then(async (load_results) => {
-            if (log_lvl)
-                console.log(
-                    `[UI Trace] handle_load_ae_obj_id: Library returned results in ${(performance.now() - start).toFixed(2)}ms.`
-                );
-
-            if (load_results) {
-                $events_slct.event_session_obj = load_results;
-                $events_slct.event_file_obj_li =
-                    load_results.event_file_li ?? [];
-                $events_slct.event_presentation_obj_li =
-                    load_results.event_presentation_li ?? [];
-            }
-        })
-        .finally(() => {
-            loading__session_id_status = false;
-        });
-}
 </script>
 
 <div