fix(events): ensure presenters and presentation-level files show correctly

- Harden 'ae_events__event_presenter.ts' to ensure both ID and ID_random fields are synced during refreshes.
- Update presenter list wrapper to use '_id_random' for reliable Dexie queries.
- Enable 'inc_all_file_li' and 'inc_file_li' in session loaders to pre-cache nested files.
- Introduce 'Launcher_presentation_view.svelte' to explicitly display files linked to presentations.
- Refactor presenter views to focus exclusively on speaker-specific files, avoiding UI duplication.

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

@@ -18,6 +18,7 @@
 
     // import Element_ae_crud from '$lib/element_ae_crud.svelte';
     import Event_launcher_file_cont from './launcher_file_cont.svelte';
+    import Launcher_presentation_view from './launcher_presentation_view.svelte';
     import Launcher_presenter_view from './launcher_presenter_view.svelte';
     import Launcher_presenter_view_posters from './launcher_presenter_view_posters.svelte';
 
@@ -494,6 +495,9 @@
                                 {/if}
                             </div>
 
+                            <!-- Presentation-level files -->
+                            <Launcher_presentation_view lq__event_presentation_obj={event_presentation_obj} />
+
                             <!-- The presenter list -->
 
                             {#if $lq__event_presenter_obj_li && $lq__event_presenter_obj_li.length}