✨ feat(tables): add "No Results" empty state for all table components

Add consistent empty state handling across all table components to improve
user experience when search/filter results are empty.

Changes:
- Import Empty component and IllustrationNoResult/IllustrationNoResultDark from @douyinfe/semi-ui
- Add empty prop to Table components with "搜索无结果" message
- Support both light and dark theme illustrations
- Apply internationalization support for empty state text

Affected files:
- web/src/components/table/MjLogsTable.js
- web/src/components/table/LogsTable.js
- web/src/components/table/ChannelsTable.js
- web/src/components/table/RedemptionsTable.js
- web/src/components/table/TaskLogsTable.js
- web/src/components/table/TokensTable.js
- web/src/components/table/UsersTable.js
- web/src/components/table/ModelPricing.js

This ensures consistent UX across all table components when no data
matches the current search or filter criteria.

web/src/components/table/UsersTable.js

@@ -20,6 +20,7 @@ import {
   Card,
   Divider,
   Dropdown,
+  Empty,
   Form,
   Modal,
   Space,
@@ -27,6 +28,10 @@ import {
   Tag,
   Typography
 } from '@douyinfe/semi-ui';
+import {
+  IllustrationNoResult,
+  IllustrationNoResultDark
+} from '@douyinfe/semi-illustrations';
 import {
   IconPlus,
   IconSearch,
@@ -640,6 +645,14 @@ const UsersTable = () => {
           }}
           loading={loading}
           onRow={handleRow}
+          empty={
+            <Empty
+              image={<IllustrationNoResult style={{ width: 150, height: 150 }} />}
+              darkModeImage={<IllustrationNoResultDark style={{ width: 150, height: 150 }} />}
+              description={t('搜索无结果')}
+              style={{ padding: 30 }}
+            />
+          }
           className="rounded-xl overflow-hidden"
           size="middle"
         />