Add used-product flag for store listings.

Merchants can mark items as used on create/edit, see a used badge on cards, and filter the store list for used products.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/pages/StoreItemsPage.tsx

@@ -76,6 +76,7 @@ function StoreItemsPageContent() {
   const [draftMinPrice, setDraftMinPrice] = useState('')
   const [draftMaxPrice, setDraftMaxPrice] = useState('')
   const [draftOnlyDiscounted, setDraftOnlyDiscounted] = useState(false)
+  const [draftOnlyUsed, setDraftOnlyUsed] = useState(false)
   const [appliedFilters, setAppliedFilters] = useState<StoreListingFilters>(
     EMPTY_STORE_LISTING_FILTERS,
   )
@@ -156,6 +157,7 @@ function StoreItemsPageContent() {
       minPrice: parseIrtInput(draftMinPrice),
       maxPrice: parseIrtInput(draftMaxPrice),
       onlyDiscounted: draftOnlyDiscounted,
+      onlyUsed: draftOnlyUsed,
     })
     writePage(1)
   }
@@ -165,6 +167,7 @@ function StoreItemsPageContent() {
     setDraftMinPrice('')
     setDraftMaxPrice('')
     setDraftOnlyDiscounted(false)
+    setDraftOnlyUsed(false)
     setAppliedFilters(EMPTY_STORE_LISTING_FILTERS)
     writePage(1)
   }
@@ -415,6 +418,22 @@ function StoreItemsPageContent() {
                 </span>
               </div>
             </div>
+            <div className={`${filterStyles.switchField} ${filterStyles.fieldCol3}`}>
+              <div className={filterStyles.switchInline}>
+                <ToggleSwitch
+                  checked={draftOnlyUsed}
+                  onChange={setDraftOnlyUsed}
+                  disabled={isLoading}
+                  ariaLabel={t('storeItems.onlyUsed')}
+                />
+                <span
+                  className={filterStyles.switchLabel}
+                  onClick={() => !isLoading && setDraftOnlyUsed(!draftOnlyUsed)}
+                >
+                  {t('storeItems.onlyUsed')}
+                </span>
+              </div>
+            </div>
           </div>
           <div className={filterStyles.filterActions}>
             <input