Standardize Event DB/Types and fix critical UI type mismatches across Badges, Journals, and Locations modules

src/routes/events/[event_id]/(leads)/leads/exhibit/[exhibit_id]/+page.svelte

@@ -50,7 +50,7 @@
     // Exhibit Info
     let lq__exhibit_obj = liveQuery(() => {
         const exhibit_id = page.params.exhibit_id;
-        if (!exhibit_id) return null;
+        if (!exhibit_id) return undefined;
         return db_events.exhibit.get(exhibit_id);
     });