[feat] add DeepSeek Harness sidebar support and setup guides

apps/mcp/scripts/pack.mjs

@@ -37,6 +37,7 @@ try {
     "src",
     "ui",
     "scripts",
+    "integrations",
     "tsconfig.json",
     "tsconfig.ui.json",
     "package-lock.json",
@@ -56,6 +57,8 @@ try {
       "src",
       "ui",
       "scripts/build-ui.mjs",
+      "scripts/build-harness.mjs",
+      "integrations",
       "tsconfig.json",
       "tsconfig.ui.json",
       "build-package.json",