fix(search) : disable client-side filtering when server-search is active

SearchSelect was filtering results client-side on label only, hiding
server results matched by reference. Add serverSearch prop to bypass
client filter when the API already handles search.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/components/ProductSelect.vue

@@ -10,6 +10,7 @@
       option-value="id"
       option-label="name"
       :disabled="disabled"
+      server-search
       @update:modelValue="updateValue"
       @search="handleSearch"
     >