feat: implement local deep search engine

mindsearch-config.mjs

@@ -42,6 +42,18 @@ const BUILTIN_SERVICES = Object.freeze([
     timeoutMs: 8000,
     priority: 80,
   },
+  {
+    id: 'deep-search',
+    name: 'TKMind Deep Search',
+    kind: 'orchestrator',
+    adapter: 'research-http',
+    capabilities: ['search.web', 'research.plan', 'research.execute'],
+    endpoint: 'http://127.0.0.1:20100',
+    healthPath: '/health',
+    enabled: false,
+    timeoutMs: 120000,
+    priority: 100,
+  },
 ]);
 
 export const MINDSEARCH_DEFAULT_CONFIG = Object.freeze({
@@ -50,7 +62,7 @@ export const MINDSEARCH_DEFAULT_CONFIG = Object.freeze({
   providers: { searxng: false, github: false, reader: false },
   settings: { searxngEndpoint: '', maxResults: 10, timeoutMs: 8000, readerMaxChars: 12000 },
   services: BUILTIN_SERVICES,
-  routes: { web: 'searxng', news: 'searxng', code: 'github', read: 'reader', research: '' },
+  routes: { web: 'searxng', news: 'searxng', code: 'github', read: 'reader', research: 'deep-search' },
 });
 
 const clone = (value) => JSON.parse(JSON.stringify(value));
@@ -115,7 +127,9 @@ function builtinsFromLegacy(input = {}) {
     endpoint: service.adapter === 'searxng'
       ? String(settings.searxngEndpoint ?? service.endpoint)
       : service.endpoint,
-    timeoutMs: settings.timeoutMs ?? service.timeoutMs,
+    timeoutMs: service.adapter === 'research-http'
+      ? service.timeoutMs
+      : (settings.timeoutMs ?? service.timeoutMs),
   }, service));
 }
 
@@ -185,7 +199,12 @@ export async function probeMindSearchService(service, { fetchImpl = fetch } = {}
   try {
     const response = await fetchImpl(url, {
       signal: AbortSignal.timeout(normalized.timeoutMs),
-      headers: { accept: 'application/json,text/plain' },
+      headers: {
+        accept: 'application/json,text/plain',
+        ...(normalized.adapter === 'research-http' && process.env.TKMIND_DEEP_SEARCH_SECRET
+          ? { 'x-secret-key': process.env.TKMIND_DEEP_SEARCH_SECRET }
+          : {}),
+      },
     });
     let resultCount = null;
     if (normalized.adapter === 'searxng' && response.ok) {