fix: Findagram brands page crash and PWA icon errors

- Fix mapBrandForUI to use correct 'brand' field from API response
- Add null check in Brands.jsx filter to prevent crash on undefined names
- Fix BrandPenetrationService sps.brand_name -> sps.brand_name_raw
- Remove missing logo192.png and logo512.png from PWA manifest

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

findagram/frontend/public/manifest.json

@@ -7,16 +7,6 @@
       "src": "favicon.ico",
       "sizes": "64x64 32x32 24x24 16x16",
       "type": "image/x-icon"
-    },
-    {
-      "src": "logo192.png",
-      "type": "image/png",
-      "sizes": "192x192"
-    },
-    {
-      "src": "logo512.png",
-      "type": "image/png",
-      "sizes": "512x512"
     }
   ],
   "start_url": ".",

findagram/frontend/src/api/client.js

@@ -373,10 +373,12 @@ export function mapCategoryForUI(apiCategory) {
  * Map API brand to UI-compatible format
  */
 export function mapBrandForUI(apiBrand) {
+  // API returns 'brand' field (see /api/v1/brands endpoint)
+  const brandName = apiBrand.brand || apiBrand.brand_name || '';
   return {
-    id: apiBrand.brand_name,
-    name: apiBrand.brand_name,
-    slug: apiBrand.brand_name?.toLowerCase().replace(/\s+/g, '-'),
+    id: brandName,
+    name: brandName,
+    slug: brandName ? brandName.toLowerCase().replace(/\s+/g, '-') : '',
     logo: apiBrand.brand_logo_url || null,
     productCount: parseInt(apiBrand.product_count || 0, 10),
     dispensaryCount: parseInt(apiBrand.dispensary_count || 0, 10),

findagram/frontend/src/pages/findagram/Brands.jsx

@@ -27,7 +27,7 @@ const Brands = () => {
   }, []);
 
   const filteredBrands = brands.filter((brand) =>
-    brand.name.toLowerCase().includes(searchQuery.toLowerCase())
+    brand.name && brand.name.toLowerCase().includes(searchQuery.toLowerCase())
   );
 
   // Group brands alphabetically