fix(locations): auto-load locations on page open; fix session query and POC visibility

- Add +page.ts to trigger load_ae_obj_li__event_location on page load (locations
  were never fetched without a manual trigger)
- Fix ae_comp__event_session_obj_li_wrapper: query used event_location_id_random
  (deprecated index) instead of event_location_id, causing empty session lists
  under each location
- Wire hide__session_poc to pres_mgmt_loc.current.show__session_li_poc_field so
  the Options toggle actually takes effect in the per-location session list
- Also set hide__session_location=true since location is implicit in that context

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

src/routes/events/[event_id]/(pres_mgmt)/locations/+page.ts

@@ -0,0 +1,23 @@
+/** @type {import('./$types').PageLoad} */
+
+import { browser } from '$app/environment';
+import { events_func } from '$lib/ae_events/ae_events_functions';
+
+export async function load({ parent }) {
+    const parent_data = await parent();
+
+    const account_id = parent_data.account_id;
+    const ae_acct = parent_data[account_id];
+    const event_id = ae_acct.slct.event_id;
+
+    if (browser && event_id) {
+        events_func.load_ae_obj_li__event_location({
+            api_cfg: ae_acct.api,
+            for_obj_type: 'event',
+            for_obj_id: event_id,
+            hidden: 'all'
+        });
+    }
+
+    return parent_data;
+}

src/routes/events/[event_id]/(pres_mgmt)/locations/ae_comp__event_location_obj_li.svelte

@@ -386,6 +386,8 @@ if (!pres_mgmt_loc.current.location_kv) {
                                     link_to_type={'event_location'}
                                     link_to_id={event_location_obj?.event_location_id}
                                     event_session_id_random_li={[]}
+                                    hide__session_location={true}
+                                    hide__session_poc={!pres_mgmt_loc.current.show__session_li_poc_field}
                                     {log_lvl}></Comp_event_session_obj_li>
                             {/if}
                         {:else if pres_mgmt_loc.current.show_content__location_devices_sessions == 'devices'}

src/routes/events/ae_comp__event_session_obj_li_wrapper.svelte

@@ -41,7 +41,7 @@ let lq__event_session_obj_li = $derived.by(() => {
     return liveQuery(async () => {
         if (link_to_type && link_to_id) {
             const results = await db_events.session
-                .where(`${link_to_type}_id_random`)
+                .where(`${link_to_type}_id`)
                 .equals(link_to_id)
                 .sortBy('start_datetime');
             return results;