fix: react-doctor → 64/100 (Bugs 122, Perf 286, A11y 613, Maint 436)

- CartContext: lazy initializers replace mount-only useEffect
  hydration; remove 8 no-initialize-state warnings
- Toast/AdminSearchInput: React 19 useContext/use + drop
  forwardRef (3 no-react19-deprecated-apis)
- ProductFormModal: lazy initializers + useSyncExternalStore
  for mount; parent adds key=editingProduct.id
- InstallPrompt: useReducer for prompt state (no-cascading-set-state)
- QRScanModal: ref-based latest-callback pattern replaces
  useEffectEvent deps mistake
- OnboardingFlow: functional setState (rerender-functional-setstate)
- UsersPage/StopsCalendar/FeaturesAndStats: lazy initializers
  (rerender-lazy-state-init)
- FAQClientPage: server-side brand settings fetch via getBrandSettingsPublic
  in layout; remove supabase import
- LandingPageWrapper: href='#' → href='#top' (anchor-is-valid)
- TuxedoVideoHero: replace animate-bounce with ease-out-expo
  (no-inline-bounce-easing)
- ProductTableClient: useCallback for handleDeleted
  (jsx-no-new-function-as-prop)
- excel-parser: pre-compile delimiter regexes (js-hoist-regexp)
- water-log/settings: Promise.all for parallel DB calls
  (async-parallel)
- ToastNotification: extract toast store to separate file
  (only-export-components)
- WholesaleClient: inline <WholesaleIcon/> instead of hoisting to
  const (rendering-hoist-jsx)

src/actions/stops/get-stop-details.ts

@@ -78,28 +78,31 @@ await getSession();  const adminUser = await getAdminUser();
     return { success: false, error: "Not authorized for this brand" };
   }
 
-  // 2. Candidate products for this brand
-  const { rows: allProducts } = await pool.query<{ id: string; name: string; type: string; price: number }>(
-    `SELECT id, name, type, price
-       FROM products
-      WHERE brand_id = $1 AND active = true`,
-    [stop.brand_id],
-  );
-
-  // 3. Assigned products (joined with product info)
-  const { rows: productStops } = await pool.query<AssignedProduct>(
-    `SELECT ps.id, ps.product_id,
-            json_build_object('id', p.id, 'name', p.name, 'type', p.type, 'price', p.price) AS products
-       FROM product_stops ps
-       LEFT JOIN products p ON p.id = ps.product_id
-      WHERE ps.stop_id = $1`,
-    [stopId],
-  );
-
-  // 4. Brands for the brand switcher
-  const { rows: brands } = await pool.query<{ id: string; name: string; slug: string }>(
-    `SELECT id, name, slug FROM brands ORDER BY name`,
-  );
+  // 2 + 3 + 4. Candidate products, assigned products, and brand switcher
+  // list — all independent reads, fetched in parallel.
+  const [
+    { rows: allProducts },
+    { rows: productStops },
+    { rows: brands },
+  ] = await Promise.all([
+    pool.query<{ id: string; name: string; type: string; price: number }>(
+      `SELECT id, name, type, price
+         FROM products
+        WHERE brand_id = $1 AND active = true`,
+      [stop.brand_id],
+    ),
+    pool.query<AssignedProduct>(
+      `SELECT ps.id, ps.product_id,
+              json_build_object('id', p.id, 'name', p.name, 'type', p.type, 'price', p.price) AS products
+         FROM product_stops ps
+         LEFT JOIN products p ON p.id = ps.product_id
+        WHERE ps.stop_id = $1`,
+      [stopId],
+    ),
+    pool.query<{ id: string; name: string; slug: string }>(
+      `SELECT id, name, slug FROM brands ORDER BY name`,
+    ),
+  ]);
 
   return {
     success: true,