fix(tui): show prompt submission errors (#31949)

packages/tui/src/component/prompt/index.tsx

@@ -1086,7 +1086,8 @@ export function Prompt(props: PromptProps) {
     } else {
       move.startSubmit()
       sdk.client.session
-        .prompt({
+        .prompt(
+          {
             sessionID,
             ...selectedModel,
             agent: agent.name,
@@ -1100,8 +1101,16 @@ export function Prompt(props: PromptProps) {
               },
               ...nonTextParts,
             ],
+          },
+          { throwOnError: true },
+        )
+        .catch((error) => {
+          toast.show({
+            title: "Failed to send prompt",
+            message: errorMessage(error),
+            variant: "error",
+          })
         })
-        .catch(() => {})
       if (editorParts.length > 0) editor.markSelectionSent()
     }
     history.append({