feat: add NIP-99/Gamma Markets kind categories for curating mode

Add marketplace_nip99 category with Plebeian Market event kinds:
- 30402 (Products)
- 30403 (Orders - legacy)
- 30405 (Collections)
- 30406 (Shipping options)
- 31555 (Product reviews)

Add order_communication category for Gamma Markets (kinds 16, 17).

Rename existing marketplace category to marketplace_nip15 for clarity
while keeping backward compatibility with the legacy alias.

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

app/web/src/kindCategories.js

@@ -30,11 +30,23 @@ export const curationKindCategories = [
     kinds: [1063, 20, 21, 22],
   },
   {
-    id: "marketplace",
-    name: "Marketplace",
-    description: "Product listings, stalls, and marketplace events",
+    id: "marketplace_nip15",
+    name: "Marketplace (NIP-15)",
+    description: "Legacy NIP-15 stalls and products",
     kinds: [30017, 30018, 30019, 30020],
   },
+  {
+    id: "marketplace_nip99",
+    name: "Marketplace (NIP-99/Gamma)",
+    description: "NIP-99 classified listings, collections, shipping, reviews (Plebeian Market)",
+    kinds: [30402, 30403, 30405, 30406, 31555],
+  },
+  {
+    id: "order_communication",
+    name: "Order Communication",
+    description: "Gamma Markets order messages and payment receipts (kinds 16, 17)",
+    kinds: [16, 17],
+  },
   {
     id: "groups_nip29",
     name: "Group Messaging (NIP-29)",