chore(showcase): pin langgraph integrations to stable releases

copilotkit 0.1.94a3->0.1.94 (py), @copilotkit/* 1.59.2->1.59.4 +
sdk-js alpha.3->1.59.4 (ts). Drop the @ag-ui/langgraph override —
runtime 1.59.4 now carries @ag-ui/a2ui-middleware 0.0.6 (the
injectA2UITool forward) + @ag-ui/langgraph 0.0.37. Locks regenerated.

Author: ranst91

showcase/integrations/langgraph-fastapi/package-lock.json

@@ -10,12 +10,12 @@
     "test:e2e": "playwright test"
   },
   "dependencies": {
-    "@copilotkit/a2ui-renderer": "1.59.2",
-    "@copilotkit/react-core": "1.59.2",
-    "@copilotkit/react-ui": "1.59.2",
-    "@copilotkit/runtime": "1.59.2",
-    "@copilotkit/shared": "1.59.2",
-    "@copilotkit/voice": "1.59.2",
+    "@copilotkit/a2ui-renderer": "1.59.4",
+    "@copilotkit/react-core": "1.59.4",
+    "@copilotkit/react-ui": "1.59.4",
+    "@copilotkit/runtime": "1.59.4",
+    "@copilotkit/shared": "1.59.4",
+    "@copilotkit/voice": "1.59.4",
     "@hashbrownai/core": "0.5.0-beta.4",
     "@hashbrownai/react": "0.5.0-beta.4",
     "@json-render/core": "0.18.0",
@@ -50,15 +50,13 @@
     "typescript": "^5.7.0"
   },
   "overrides": {
-    "@ag-ui/langgraph": "0.0.37",
     "@copilotkit/web-inspector": {
-      "@copilotkit/core": "1.59.2"
+      "@copilotkit/core": "1.59.4"
     }
   },
   "pnpm": {
     "overrides": {
-      "@ag-ui/langgraph": "0.0.37",
-      "@copilotkit/web-inspector>@copilotkit/core": "1.59.2"
+      "@copilotkit/web-inspector>@copilotkit/core": "1.59.4"
     }
   }
 }

showcase/integrations/langgraph-fastapi/package.json

@@ -1,4 +1,4 @@
-copilotkit==0.1.94a3
+copilotkit==0.1.94
 langchain==1.2.15
 langchain-openai==1.1.9
 langchain-anthropic==1.4.1