iap: per-release payment flavors (web=ZarinPal, bazaar, myket)

Payment provider is baked at build time via NEXT_PUBLIC_STORE and selected by
storeBilling.getStore(). Add cross-env + flavor build scripts:

  npm run build:web | build:bazaar | build:myket     # web bundle per flavor
  npm run cap:bazaar | cap:myket                      # build flavor + cap sync
  npm run aab:bazaar | aab:myket                      # signed AAB (bundleRelease)
  npm run apk:bazaar | apk:myket                      # release APK (assembleRelease)

web → ZarinPal gateway, bazaar → Cafe Bazaar IAB (deep-link), myket → Myket IAB
(native bridge). A plain native build with no flavor still falls back to bazaar.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package-lock.json

@@ -29,6 +29,7 @@
         "@types/node": "^20",
         "@types/react": "^19",
         "@types/react-dom": "^19",
+        "cross-env": "^10.1.0",
         "eslint": "^9",
         "eslint-config-next": "16.2.7",
         "playwright": "^1.60.0",
@@ -396,6 +397,13 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@epic-web/invariant": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@epic-web/invariant/-/invariant-1.0.0.tgz",
+      "integrity": "sha512-lrTPqgvfFQtR/eY/qkIzp98OGdNJu0m5ji3q/nJI8v3SXkRKEnWiOxMmbvcSoAIzv/cGiuvRy57k4suKQSAdwA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.9.1",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.9.1.tgz",
@@ -3144,6 +3152,24 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cross-env": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-10.1.0.tgz",
+      "integrity": "sha512-GsYosgnACZTADcmEyJctkJIoqAhHjttw7RsFrVoJNXbsWWqaq6Ym+7kZjq6mS45O0jij6vtiReppKQEtqWy6Dw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@epic-web/invariant": "^1.0.0",
+        "cross-spawn": "^7.0.6"
+      },
+      "bin": {
+        "cross-env": "dist/bin/cross-env.js",
+        "cross-env-shell": "dist/bin/cross-env-shell.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",

package.json

@@ -7,9 +7,18 @@
     "build": "next build",
     "start": "next start",
     "lint": "eslint",
+    "build:web": "cross-env NEXT_PUBLIC_STORE=web next build",
+    "build:bazaar": "cross-env NEXT_PUBLIC_STORE=bazaar next build",
+    "build:myket": "cross-env NEXT_PUBLIC_STORE=myket next build",
     "cap:sync": "next build && npx cap sync android",
+    "cap:bazaar": "npm run build:bazaar && npx cap sync android",
+    "cap:myket": "npm run build:myket && npx cap sync android",
     "android:open": "npx cap open android",
-    "android:apk": "npm run cap:sync && cd android && gradlew.bat assembleDebug"
+    "android:apk": "npm run cap:sync && cd android && gradlew.bat assembleDebug",
+    "aab:bazaar": "npm run cap:bazaar && cd android && gradlew.bat bundleRelease",
+    "aab:myket": "npm run cap:myket && cd android && gradlew.bat bundleRelease",
+    "apk:bazaar": "npm run cap:bazaar && cd android && gradlew.bat assembleRelease",
+    "apk:myket": "npm run cap:myket && cd android && gradlew.bat assembleRelease"
   },
   "dependencies": {
     "@capacitor/app": "^8.1.0",
@@ -33,6 +42,7 @@
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
+    "cross-env": "^10.1.0",
     "eslint": "^9",
     "eslint-config-next": "16.2.7",
     "playwright": "^1.60.0",