Fix: auto-start charts and remove ScriptRunContext warning from background thread

src/py_dvt_ate/app/dashboard/app.py

@@ -62,6 +62,7 @@ def start_embedded_server() -> tuple[SimulationServer, threading.Thread]:
     )
 
     server_ready = threading.Event()
+    server_error: list[Exception] = []  # Use list to share error across threads
 
     def run_server() -> None:
         """Run the async server in a new event loop."""
@@ -74,7 +75,7 @@ def start_embedded_server() -> tuple[SimulationServer, threading.Thread]:
             # Keep the event loop running
             loop.run_forever()
         except Exception as e:
-            st.error(f"Server error: {e}")
+            server_error.append(e)  # Store error for main thread
             server_ready.set()  # Signal even on error
         finally:
             try:
@@ -90,6 +91,10 @@ def start_embedded_server() -> tuple[SimulationServer, threading.Thread]:
     if not server_ready.wait(timeout=5.0):
         st.error("Server failed to start within timeout")
 
+    # Check if there was an error during startup
+    if server_error:
+        st.error(f"Server startup error: {server_error[0]}")
+
     return server, thread
 
 
@@ -140,7 +145,7 @@ def init_session_state() -> None:
     if "history" not in st.session_state:
         st.session_state.history = SimulationHistory()
     if "running" not in st.session_state:
-        st.session_state.running = False
+        st.session_state.running = True  # Start charts by default
     if "last_update" not in st.session_state:
         st.session_state.last_update = time.time()
     if "test_running" not in st.session_state:
@@ -221,9 +226,9 @@ def display_controls() -> None:
     """Display simulation control panel in sidebar."""
     st.sidebar.header("Simulation Controls")
 
-    st.sidebar.info("🔧 Physics engine is always running in the background. Use the button below to start/stop chart updates.")
+    st.sidebar.info("🔧 Physics engine and charts are running automatically. Use the button below to pause/resume chart updates if needed.")
 
-    # Start/Stop button
+    # Pause/Resume button
     if st.session_state.running:
         if st.sidebar.button(
             "⏸️ Pause Charts", type="primary", width="stretch"