chore: exclude local resource artifacts from main sync

scripts/prepare-app-dist.mjs

@@ -0,0 +1,25 @@
+import { existsSync, readdirSync, rmSync } from 'node:fs';
+import { basename, join, resolve } from 'node:path';
+
+const cwd = process.cwd();
+const outDir = resolve(cwd, process.env.APP_DIST_DIR?.trim() || 'app-dist');
+const backupPrefix = 'assets.root-owned-backup-';
+
+if (!existsSync(outDir)) {
+  process.exit(0);
+}
+
+for (const entry of readdirSync(outDir, { withFileTypes: true })) {
+  if (entry.name.startsWith(backupPrefix)) {
+    continue;
+  }
+
+  const targetPath = join(outDir, entry.name);
+
+  try {
+    rmSync(targetPath, { recursive: true, force: true });
+  } catch (error) {
+    const message = error instanceof Error ? error.message : String(error);
+    console.warn(`[prepare-app-dist] skipped ${basename(targetPath)}: ${message}`);
+  }
+}