feat: sign Android APK and generate icons from logo.png or favicon.ico

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/scripts/generate-app-icons.mjs

@@ -0,0 +1,47 @@
+import { execSync } from "node:child_process";
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const root = path.resolve(__dirname, "../..");
+const distDir = path.join(root, "template", "dist");
+const templateDir = path.join(root, "template");
+
+const ICON_PRIORITY = ["logo.png", "favicon.ico"];
+
+function findIconSource(baseDir) {
+  for (const name of ICON_PRIORITY) {
+    const direct = path.join(baseDir, name);
+    if (fs.existsSync(direct)) return direct;
+  }
+
+  for (const entry of fs.readdirSync(baseDir, { withFileTypes: true })) {
+    if (!entry.isDirectory()) continue;
+    for (const name of ICON_PRIORITY) {
+      const nested = path.join(baseDir, entry.name, name);
+      if (fs.existsSync(nested)) return nested;
+    }
+  }
+
+  return null;
+}
+
+export function generateAppIcons() {
+  if (!fs.existsSync(distDir)) {
+    console.log("No dist directory, keeping default icons");
+    return;
+  }
+
+  const iconSource = findIconSource(distDir);
+  if (!iconSource) {
+    console.log("No logo.png or favicon.ico found, keeping default icons");
+    return;
+  }
+
+  console.log(`Generating app icons from: ${path.relative(root, iconSource)}`);
+  execSync(`npx tauri icon "${iconSource}"`, {
+    cwd: templateDir,
+    stdio: "inherit",
+  });
+}