feat: Fetch conversation list by @tanstack/react-query and displays error message that task_executor does not exist #2088 (#2112)

### What problem does this PR solve?

feat: Fetch conversation list by @tanstack/react-query
feat: Displays error message that task_executor does not exist

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/user-setting/setting-system/index.tsx

@@ -70,9 +70,13 @@ const SystemInfo = () => {
                 key={key}
               >
                 {key === 'task_executor' ? (
-                  <TaskBarChat
-                    data={info.elapsed as TaskExecutorElapsed}
-                  ></TaskBarChat>
+                  info?.elapsed ? (
+                    <TaskBarChat
+                      data={info.elapsed as TaskExecutorElapsed}
+                    ></TaskBarChat>
+                  ) : (
+                    <Text className={styles.error}>{info.error}</Text>
+                  )
                 ) : (
                   Object.keys(info)
                     .filter((x) => x !== 'status')