Fixes: Bugs fixed #10703 (#11154)

### What problem does this PR solve?

Fixes: Bugs fixed
- Removed invalid code,
- Modified the user center style,
- Added an automatic data source parsing switch.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/user-setting/setting-model/components/system-setting.tsx

@@ -140,7 +140,7 @@ const SystemSetting = ({ onOk, loading }: IProps) => {
   }) => {
     return (
       <div className="flex gap-3">
-        <label className="block text-sm font-medium text-text-primary mb-1 w-1/4">
+        <label className="block text-sm font-medium text-text-secondary mb-1 w-1/4">
           {isRequired && <span className="text-red-500">*</span>}
           {label}
           {tooltip && (
@@ -157,6 +157,7 @@ const SystemSetting = ({ onOk, loading }: IProps) => {
         </label>
         <SelectWithSearch
           triggerClassName="w-3/4"
+          allowClear={id !== 'llm_id'}
           value={value}
           options={options}
           onChange={(value) => handleFieldChange(id, value)}
@@ -169,7 +170,7 @@ const SystemSetting = ({ onOk, loading }: IProps) => {
   return (
     <div className="rounded-lg w-full">
       <div className="flex flex-col py-4">
-        <div className="text-2xl font-semibold">{t('systemModelSettings')}</div>
+        <div className="text-2xl font-medium">{t('systemModelSettings')}</div>
         <div className="text-sm text-text-secondary">
           {t('systemModelDescription')}
         </div>