fix: add configurable PORT env var to AGUI templates + update snapshots

All 3 AGUI templates now read PORT from env with default 8080:
  uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))

Addresses PR review comment requesting configurable port for local testing.

Author: aidandaly24

src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap

@@ -1849,7 +1849,7 @@ async def ping():
 
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="0.0.0.0", port=8080)
+    uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))
 "
 `;
 
@@ -2012,6 +2012,7 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from langgraph.graph import StateGraph, START
 from langgraph.graph.message import MessagesState
+from langgraph.checkpoint.memory import MemorySaver
 from langgraph.prebuilt import ToolNode, tools_condition
 from langchain_core.tools import tool
 from opentelemetry.instrumentation.langchain import LangchainInstrumentor
@@ -2049,7 +2050,7 @@ builder.add_node("tools", ToolNode(tools=backend_tools))
 builder.add_edge(START, "chat")
 builder.add_conditional_edges("chat", tools_condition)
 builder.add_edge("tools", "chat")
-graph = builder.compile()
+graph = builder.compile(checkpointer=MemorySaver())
 
 agent = LangGraphAgent(
     name="{{ name }}",
@@ -2074,7 +2075,7 @@ async def ping():
 
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="0.0.0.0", port=8080)
+    uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))
 "
 `;
 
@@ -2358,7 +2359,7 @@ agui_agent = StrandsAgent(agent=agent, name="{{ name }}", description="A helpful
 app = create_strands_app(agui_agent, path="/invocations", ping_path="/ping")
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="0.0.0.0", port=8080)
+    uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))
 "
 `;
 

src/assets/python/agui/googleadk/base/main.py

@@ -24,4 +24,4 @@ async def ping():
 
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="0.0.0.0", port=8080)
+    uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))

src/assets/python/agui/langchain_langgraph/base/main.py

@@ -71,4 +71,4 @@ async def ping():
 
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="0.0.0.0", port=8080)
+    uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))

src/assets/python/agui/strands/base/main.py

@@ -40,4 +40,4 @@ def session_manager_provider(input_data):
 app = create_strands_app(agui_agent, path="/invocations", ping_path="/ping")
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="0.0.0.0", port=8080)
+    uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", "8080")))