Add smart ACK provider for WeChat MP replies

Replace fixed ackText with a rule-based AckProvider that picks
response templates by message type and intent (translate, summary,
rewrite, poster, ppt, mindmap, code, search, schedule). Pure sync,
zero I/O, auto-falls back to config.ackText on any error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/build-portal-runtime.mjs

@@ -94,6 +94,26 @@ async function bundleServer() {
   await run(esbuildBin, args);
 }
 
+async function bundleSandboxMcp() {
+  if (!(await exists(esbuildBin))) {
+    throw new Error(`未找到 esbuild: ${esbuildBin}`);
+  }
+  console.log('==> 打包 sandbox MCP 为单文件 runtime');
+  const args = [
+    'mindspace-sandbox-mcp.mjs',
+    '--bundle',
+    '--platform=node',
+    '--format=esm',
+    '--target=node24',
+    '--outfile=.runtime/portal/mindspace-sandbox-mcp.mjs',
+    '--banner:js=import { createRequire as __createRequire } from "node:module"; const require = __createRequire(import.meta.url);',
+  ];
+  for (const pkg of externalPackages) {
+    args.push(`--external:${pkg}`);
+  }
+  await run(esbuildBin, args);
+}
+
 async function copyRuntimeAssets() {
   console.log('==> 拷贝运行时静态资源');
   await remove(runtimeRoot);
@@ -111,11 +131,6 @@ async function copyRuntimeAssets() {
   if (await exists(schemaFile)) {
     await fs.copyFile(schemaFile, path.join(runtimeRoot, 'schema.sql'));
   }
-
-  const sandboxMcpFile = path.join(root, 'mindspace-sandbox-mcp.mjs');
-  if (await exists(sandboxMcpFile)) {
-    await fs.copyFile(sandboxMcpFile, path.join(runtimeRoot, 'mindspace-sandbox-mcp.mjs'));
-  }
 }
 
 async function copyNodeModules() {
@@ -212,7 +227,7 @@ async function writeMetadata() {
       '  logs/',
       '',
       'Bundled alongside server.mjs (required for sandbox-fs MCP):',
-      '  mindspace-sandbox-mcp.mjs',
+      '  mindspace-sandbox-mcp.mjs  (esbuild bundle; includes schedule-service deps)',
       '',
       'Key runtime differences must stay in .env, not in the artifact:',
       '  DATABASE_URL / MYSQL_*',
@@ -233,6 +248,7 @@ async function main() {
   await buildFrontend();
   await copyRuntimeAssets();
   await bundleServer();
+  await bundleSandboxMcp();
   await copyNodeModules();
   await writeMetadata();
   await fs.chmod(path.join(runtimeRoot, 'scripts', 'run-memind-portal-prod.sh'), 0o755);