feat(events): show the redeemed promo code in the scanner roster

Maps applied_promo_code from the stats endpoint onto the roster rows as a
small outline badge and includes it in the fuzzy search keys.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ByAwHU4pRnyE58YocQvAas

src/modules/events/composables/useTicketScanner.ts

@@ -28,6 +28,8 @@ export interface EventTicket {
   name?: string | null
   registered: boolean
   registeredAt: string | null
+  /** Promo code redeemed on this ticket, when the extension reports it. */
+  promoCode?: string | null
 }
 
 /** Counts + roster snapshot for the event, sourced from the backend. */
@@ -110,6 +112,7 @@ export function useTicketScanner(eventId: Ref<string>) {
           name: t.name ?? null,
           registered: t.registered,
           registeredAt: t.registered_at,
+          promoCode: t.applied_promo_code ?? null,
         })),
       }
     } catch (e) {

src/modules/events/views/ScanTicketsPage.vue

@@ -104,8 +104,9 @@ const { searchQuery, filteredItems: searchedTickets } = useFuzzySearch(
   {
     fuseOptions: {
       keys: [
-        { name: 'name', weight: 0.7 },
+        { name: 'name', weight: 0.6 },
-        { name: 'id', weight: 0.3 },
+        { name: 'id', weight: 0.25 },
+        { name: 'promoCode', weight: 0.15 },
       ],
       threshold: 0.3,
       ignoreLocation: true,
@@ -296,6 +297,14 @@ function fmtTime(iso: string) {
                     <span v-if="ticket.name" class="font-medium text-foreground">
                       {{ ticket.name }}
                     </span>
+                    <Badge
+                      v-if="ticket.promoCode"
+                      variant="outline"
+                      class="text-[10px] font-mono px-1.5"
+                      :title="ticket.promoCode"
+                    >
+                      {{ ticket.promoCode }}
+                    </Badge>
                   </div>
                   <p class="font-mono text-[10px] text-muted-foreground break-all mt-0.5">
                     {{ ticket.id }}