feat(server): маршрут POST /<stand>/_api/assist + оркестратор пайплайна

server.js

@@ -71,7 +71,38 @@ function proxyRequest(req, res, targetPath) {
   upstreamReq.end();
 }
 
+// AI-ассистент: лениво грузим, не роняем процесс при ошибках загрузки.
+let assistShared = null;
+let assistHandler = null;
+try {
+  const orchestrator = require('./orchestrator.js');
+  assistHandler = orchestrator.handleAssist;
+  assistShared = orchestrator.createSharedState();
+} catch (_) {
+  assistHandler = null;
+  assistShared = null;
+}
+
 const server = http.createServer((req, res) => {
+  // POST /<stand>/_api/assist — ветка AI-ассистента (до проверки 405).
+  if (req.method === 'POST') {
+    const path = (req.url || '/').split('?')[0];
+    const match = path.match(/^\/([A-Za-z0-9._-]+)\/_api\/assist$/);
+    if (match && assistHandler && assistShared) {
+      const stand = match[1];
+      assistHandler(req, res, { stand, vmDocsBaseUrl: VM_DOCS_BASE_URL, shared: assistShared })
+        .catch(() => {
+          try {
+            if (!res.headersSent) {
+              res.writeHead(500, { 'Content-Type': 'application/json; charset=utf-8' });
+              res.end(JSON.stringify({ error: 'internal_error', message: 'assist failed' }));
+            }
+          } catch (_) {}
+        });
+      return;
+    }
+  }
+
   if (req.method !== 'GET' && req.method !== 'HEAD') {
     respond(res, 405, 'Method Not Allowed');
     return;