feat(pwa): add manifest screenshot placeholders (replace pre-launch with real captures)

scripts/generate-pwa-screenshots.js

@@ -0,0 +1,39 @@
+// scripts/generate-pwa-screenshots.js
+const fs = require("fs");
+const path = require("path");
+const sharp = require("sharp");
+
+const OUT_DIR = path.join(__dirname, "..", "public", "screenshots");
+fs.mkdirSync(OUT_DIR, { recursive: true });
+
+async function main() {
+  // Desktop dashboard placeholder
+  await sharp({
+    create: { width: 1280, height: 720, channels: 3, background: { r: 250, g: 248, b: 245 } }
+  })
+  .composite([{
+    input: Buffer.from(`<svg width="1280" height="720" xmlns="http://www.w3.org/2000/svg">
+      <text x="640" y="360" font-family="serif" font-size="48" fill="#1a4d2e" text-anchor="middle">Route Commerce</text>
+    </svg>`),
+    top: 0, left: 0,
+  }])
+  .png()
+  .toFile(path.join(OUT_DIR, "dashboard.png"));
+  console.log("✓ dashboard.png");
+
+  // Mobile storefront placeholder
+  await sharp({
+    create: { width: 390, height: 844, channels: 3, background: { r: 250, g: 248, b: 245 } }
+  })
+  .composite([{
+    input: Buffer.from(`<svg width="390" height="844" xmlns="http://www.w3.org/2000/svg">
+      <text x="195" y="422" font-family="serif" font-size="32" fill="#1a4d2e" text-anchor="middle">Route Commerce</text>
+    </svg>`),
+    top: 0, left: 0,
+  }])
+  .png()
+  .toFile(path.join(OUT_DIR, "mobile-storefront.png"));
+  console.log("✓ mobile-storefront.png");
+}
+
+main().catch(console.error);