feat(activities): fuzzy search on the Tickets roster

Adds a search box above the roster list that fuzzy-matches the
holder name and ticket id via the shared useFuzzySearch (Fuse.js)
composable. Empty query keeps the unregistered-first sort intact;
typing reorders by relevance. The empty-state message now
distinguishes "no tickets sold yet" from "no rows matched the
current query" so a busy roster + a typo doesn't look like
backend trouble.

src/modules/events/views/ScanTicketsPage.vue

@@ -11,16 +11,19 @@ import {
   ScanLine,
   RefreshCw,
   UserCheck,
+  Search,
 } from 'lucide-vue-next'
 import { format } from 'date-fns'
 import { Button } from '@/components/ui/button'
 import { Badge } from '@/components/ui/badge'
+import { Input } from '@/components/ui/input'
 import { ScrollArea } from '@/components/ui/scroll-area'
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
 import QRScanner from '@/components/ui/qr-scanner.vue'
 import { useTicketScanner } from '../composables/useTicketScanner'
 import type { EventTicket } from '../composables/useTicketScanner'
 import { useEventDetail } from '../composables/useEventDetail'
+import { useFuzzySearch } from '@/composables/useFuzzySearch'
 
 const route = useRoute()
 const router = useRouter()
@@ -93,6 +96,24 @@ const unregisteredCount = computed(
   () => allTickets.value.filter(t => !t.registered).length,
 )
 
+// Fuzzy match on holder name + ticket id. When the search box is
+// empty, Fuse returns the list in its incoming order so our
+// unregistered-first sort is preserved.
+const { searchQuery, filteredItems: searchedTickets } = useFuzzySearch(
+  allTickets,
+  {
+    fuseOptions: {
+      keys: [
+        { name: 'name', weight: 0.7 },
+        { name: 'id', weight: 0.3 },
+      ],
+      threshold: 0.3,
+      ignoreLocation: true,
+    },
+    matchAllWhenSearchEmpty: true,
+  },
+)
+
 async function handleManualRegister(ticket: EventTicket) {
   pendingRegister.value.add(ticket.id)
   const res = await registerManually(ticket.id)
@@ -239,14 +260,27 @@ function fmtTime(iso: string) {
             </span>
           </h2>
 
+          <!-- Fuzzy filter on holder name + ticket id (Fuse.js via
+               useFuzzySearch). Empty query → all rows in their
+               sort order; typing → reordered by relevance. -->
+          <div v-if="allTickets.length > 0" class="relative">
+            <Search class="absolute left-2.5 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
+            <Input
+              v-model="searchQuery"
+              type="search"
+              placeholder="Search by name or ticket id…"
+              class="pl-8 h-9"
+            />
+          </div>
+
           <!-- Unregistered rows lead the list so the operator can act
                on the actionable ones first; tap "Register" to mark an
                attendee present without a QR (e.g. lost phone, known
                in person). Failures surface as a toast; the row reverts. -->
-          <ScrollArea v-if="allTickets.length > 0" class="h-[60vh]">
+          <ScrollArea v-if="searchedTickets.length > 0" class="h-[60vh]">
             <ul class="space-y-1.5 pr-3">
               <li
-                v-for="ticket in allTickets"
+                v-for="ticket in searchedTickets"
                 :key="ticket.id"
                 class="flex items-center justify-between gap-2 px-3 py-2 rounded-md bg-muted/40 text-sm"
               >
@@ -289,9 +323,15 @@ function fmtTime(iso: string) {
               </li>
             </ul>
           </ScrollArea>
-          <p v-else class="text-sm text-muted-foreground text-center py-12">
+          <p
+            v-else-if="allTickets.length === 0"
+            class="text-sm text-muted-foreground text-center py-12"
+          >
             No tickets sold yet.
           </p>
+          <p v-else class="text-sm text-muted-foreground text-center py-12">
+            No tickets match “{{ searchQuery }}”.
+          </p>
         </div>
       </TabsContent>
     </Tabs>