fix(launcher): restore digital poster session support

type_code was a prop in launcher_session_view that was never passed by
the parent layout, silently killing all poster-specific code paths
(sort order, section labels, poster presenter component, inline
presenter display). Fixed by deriving type_code directly from the
session LiveQuery object already present in the component.

Also adds a poster icon badge to the session list so poster sessions
are visually distinct from oral sessions.

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

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

@@ -1,13 +1,11 @@
 <script lang="ts">
     interface Props {
         slct__event_session_id?: string | null;
-        type_code?: string;
         log_lvl?: number;
     }
 
     let {
         slct__event_session_id = $bindable(null),
-        type_code = $bindable(''),
         log_lvl = $bindable(1)
     }: Props = $props();
 
@@ -47,6 +45,12 @@
         liveQuery(() => db_events.session.get(slct__event_session_id))
     );
 
+    // WHY: type_code drives poster vs. oral UI branching throughout this component.
+    // It was previously a prop that was never passed by the parent, so all poster
+    // code paths were silently dead. Deriving it here from the session object
+    // ensures it always reflects the current session.
+    let type_code = $derived($lq__event_session_obj?.type_code ?? '');
+
     // Event File (for a Session)
     // WHY: Pure data retrieval. Side effects (updating global stores) are removed
     // to prevent circular reactivity loops during rapid navigation.

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

@@ -288,6 +288,9 @@
                     trasnition-all
                     "
                         >
+                            {#if event_session_obj?.type_code == 'poster'}
+                                <span class="fas fa-image mr-1 text-primary-500" title="Digital Poster Session"></span>
+                            {/if}
                             {event_session_obj?.name}
                         </span>
                     </button>