✨ feat(sync): multi-language sync wizard, backend locale support, and conflict modal UX improvements

Frontend (web)
- ModelsActions.jsx
  - Replace “Sync Official” with “Sync” and open a new two-step SyncWizard.
  - Pass selected locale through to preview, sync, and overwrite flows.
  - Keep conflict resolution flow; inject locale into overwrite submission.

- New: models/modals/SyncWizardModal.jsx
  - Two-step wizard: (1) method selection (config-sync disabled for now), (2) language selection (en/zh/ja).
  - Horizontal, centered Radio cards; returns { option, locale } via onConfirm.

- UpstreamConflictModal.jsx
  - Add search input (model fuzzy search) and native pagination.
  - Column header checkbox now only applies to rows in the current filtered result.
  - Fix “Cannot access ‘filteredDataSource’ before initialization”.
  - Refactor with useMemo/useCallback; extract helpers to remove duplicated logic:
    - getPresentRowsForField, getHeaderState, applyHeaderChange
  - Minor code cleanups and stability improvements.

- i18n (en.json)
  - Add strings for the sync wizard and related actions (Sync, Sync Wizard, Select method/source/language, etc.).
  - Adjust minor translations.

Hooks
- useModelsData.jsx
  - Extend previewUpstreamDiff, syncUpstream, applyUpstreamOverwrite to accept options with locale.
  - Send locale via query/body accordingly.

Backend (Go)
- controller/model_sync.go
  - Accept locale from query/body and resolve i18n upstream URLs.
  - Add SYNC_UPSTREAM_BASE for upstream base override (default: https://basellm.github.io/llm-metadata).
  - Make HTTP timeouts/retries/limits configurable:
    - SYNC_HTTP_TIMEOUT_SECONDS, SYNC_HTTP_RETRY, SYNC_HTTP_MAX_MB
  - Add ETag-based caching and support both envelope and pure array JSON formats.
  - Concurrently fetch vendors and models; improve error responses with locale and source URLs.
  - Include source meta (locale, models_url, vendors_url) in success payloads.

Notes
- No breaking changes expected.
- Lint passes for touched files.

web/src/components/table/models/ModelsActions.jsx

@@ -21,11 +21,12 @@ import React, { useState } from 'react';
 import MissingModelsModal from './modals/MissingModelsModal';
 import PrefillGroupManagement from './modals/PrefillGroupManagement';
 import EditPrefillGroupModal from './modals/EditPrefillGroupModal';
-import { Button, Modal, Popover } from '@douyinfe/semi-ui';
+import { Button, Modal, Popover, RadioGroup, Radio } from '@douyinfe/semi-ui';
 import { showSuccess, showError, copy } from '../../../helpers';
 import CompactModeToggle from '../../common/ui/CompactModeToggle';
 import SelectionNotification from './components/SelectionNotification';
 import UpstreamConflictModal from './modals/UpstreamConflictModal';
+import SyncWizardModal from './modals/SyncWizardModal';
 
 const ModelsActions = ({
   selectedKeys,
@@ -50,10 +51,12 @@ const ModelsActions = ({
   const [prefillInit, setPrefillInit] = useState({ id: undefined });
   const [showConflict, setShowConflict] = useState(false);
   const [conflicts, setConflicts] = useState([]);
+  const [showSyncModal, setShowSyncModal] = useState(false);
+  const [syncLocale, setSyncLocale] = useState('zh');
 
-  const handleSyncUpstream = async () => {
+  const handleSyncUpstream = async (locale) => {
     // 先预览
-    const data = await previewUpstreamDiff?.();
+    const data = await previewUpstreamDiff?.({ locale });
     const conflictItems = data?.conflicts || [];
     if (conflictItems.length > 0) {
       setConflicts(conflictItems);
@@ -61,7 +64,7 @@ const ModelsActions = ({
       return;
     }
     // 无冲突，直接同步缺失
-    await syncUpstream?.();
+    await syncUpstream?.({ locale });
   };
 
   // Handle delete selected models with confirmation
@@ -151,9 +154,12 @@ const ModelsActions = ({
             className='flex-1 md:flex-initial'
             size='small'
             loading={syncing || previewing}
-            onClick={handleSyncUpstream}
+            onClick={() => {
+              setSyncLocale('zh');
+              setShowSyncModal(true);
+            }}
           >
-            {t('同步官方')}
+            {t('同步')}
           </Button>
         </Popover>
 
@@ -196,6 +202,20 @@ const ModelsActions = ({
         </div>
       </Modal>
 
+      <SyncWizardModal
+        visible={showSyncModal}
+        onClose={() => setShowSyncModal(false)}
+        loading={syncing || previewing}
+        t={t}
+        onConfirm={async ({ option, locale }) => {
+          setSyncLocale(locale);
+          if (option === 'official') {
+            await handleSyncUpstream(locale);
+          }
+          setShowSyncModal(false);
+        }}
+      />
+
       <MissingModelsModal
         visible={showMissingModal}
         onClose={() => setShowMissingModal(false)}
@@ -224,7 +244,10 @@ const ModelsActions = ({
         onClose={() => setShowConflict(false)}
         conflicts={conflicts}
         onSubmit={async (payload) => {
-          return await applyUpstreamOverwrite?.(payload);
+          return await applyUpstreamOverwrite?.({
+            ...payload,
+            locale: syncLocale,
+          });
         }}
         t={t}
         loading={syncing}

web/src/components/table/models/modals/MissingModelsModal.jsx

@@ -96,7 +96,7 @@ const MissingModelsModal = ({ visible, onClose, onConfigureModel, t }) => {
       title: '',
       dataIndex: 'operate',
       fixed: 'right',
-      width: 100,
+      width: 120,
       render: (text, record) => (
         <Button
           type='primary'

web/src/components/table/models/modals/SyncWizardModal.jsx

@@ -0,0 +1,132 @@
+/*
+Copyright (C) 2025 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
+import React, { useEffect, useState } from 'react';
+import { Modal, RadioGroup, Radio, Steps, Button } from '@douyinfe/semi-ui';
+import { useIsMobile } from '../../../../hooks/common/useIsMobile';
+
+const SyncWizardModal = ({ visible, onClose, onConfirm, loading, t }) => {
+  const [step, setStep] = useState(0);
+  const [option, setOption] = useState('official');
+  const [locale, setLocale] = useState('zh');
+  const isMobile = useIsMobile();
+
+  useEffect(() => {
+    if (visible) {
+      setStep(0);
+      setOption('official');
+      setLocale('zh');
+    }
+  }, [visible]);
+
+  return (
+    <Modal
+      title={t('同步向导')}
+      visible={visible}
+      onCancel={onClose}
+      footer={
+        <div className='flex justify-end'>
+          {step === 1 && (
+            <Button onClick={() => setStep(0)}>{t('上一步')}</Button>
+          )}
+          <Button onClick={onClose}>{t('取消')}</Button>
+          {step === 0 && (
+            <Button
+              type='primary'
+              onClick={() => setStep(1)}
+              disabled={option !== 'official'}
+            >
+              {t('下一步')}
+            </Button>
+          )}
+          {step === 1 && (
+            <Button
+              type='primary'
+              theme='solid'
+              loading={loading}
+              onClick={async () => {
+                await onConfirm?.({ option, locale });
+              }}
+            >
+              {t('开始同步')}
+            </Button>
+          )}
+        </div>
+      }
+      width={isMobile ? '100%' : 'small'}
+    >
+      <div className='mb-3'>
+        <Steps type='basic' current={step} size='small'>
+          <Steps.Step title={t('选择方式')} description={t('选择同步来源')} />
+          <Steps.Step title={t('选择语言')} description={t('选择同步语言')} />
+        </Steps>
+      </div>
+
+      {step === 0 && (
+        <div className='mt-2 flex justify-center'>
+          <RadioGroup
+            value={option}
+            onChange={(e) => setOption(e?.target?.value ?? e)}
+            type='card'
+            direction='horizontal'
+            aria-label='同步方式选择'
+            name='sync-mode-selection'
+          >
+            <Radio value='official' extra={t('从官方模型库同步')}>
+              {t('官方模型同步')}
+            </Radio>
+            <Radio value='config' extra={t('从配置文件同步')} disabled>
+              {t('配置文件同步')}
+            </Radio>
+          </RadioGroup>
+        </div>
+      )}
+
+      {step === 1 && (
+        <div className='mt-2'>
+          <div className='mb-2 text-[var(--semi-color-text-2)]'>
+            {t('请选择同步语言')}
+          </div>
+          <div className='flex justify-center'>
+            <RadioGroup
+              value={locale}
+              onChange={(e) => setLocale(e?.target?.value ?? e)}
+              type='card'
+              direction='horizontal'
+              aria-label='语言选择'
+              name='sync-locale-selection'
+            >
+              <Radio value='en' extra='English'>
+                EN
+              </Radio>
+              <Radio value='zh' extra='中文'>
+                ZH
+              </Radio>
+              <Radio value='ja' extra='日本語'>
+                JA
+              </Radio>
+            </RadioGroup>
+          </div>
+        </div>
+      )}
+    </Modal>
+  );
+};
+
+export default SyncWizardModal;

web/src/components/table/models/modals/UpstreamConflictModal.jsx

@@ -17,7 +17,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
 For commercial licensing, please contact support@quantumnous.com
 */
 
-import React, { useEffect, useMemo, useState } from 'react';
+import React, { useEffect, useMemo, useState, useCallback } from 'react';
 import {
   Modal,
   Table,
@@ -26,9 +26,12 @@ import {
   Empty,
   Tag,
   Popover,
+  Input,
 } from '@douyinfe/semi-ui';
 import { MousePointerClick } from 'lucide-react';
 import { useIsMobile } from '../../../../hooks/common/useIsMobile';
+import { MODEL_TABLE_PAGE_SIZE } from '../../../../constants';
+import { IconSearch } from '@douyinfe/semi-icons';
 
 const { Text } = Typography;
 
@@ -52,6 +55,8 @@ const UpstreamConflictModal = ({
 }) => {
   const [selections, setSelections] = useState({});
   const isMobile = useIsMobile();
+  const [currentPage, setCurrentPage] = useState(1);
+  const [searchKeyword, setSearchKeyword] = useState('');
 
   const formatValue = (v) => {
     if (v === null || v === undefined) return '-';
@@ -70,12 +75,14 @@ const UpstreamConflictModal = ({
         init[item.model_name] = new Set();
       });
       setSelections(init);
+      setCurrentPage(1);
+      setSearchKeyword('');
     } else {
       setSelections({});
     }
   }, [visible, conflicts]);
 
-  const toggleField = (modelName, field, checked) => {
+  const toggleField = useCallback((modelName, field, checked) => {
     setSelections((prev) => {
       const next = { ...prev };
       const set = new Set(next[modelName] || []);
@@ -84,7 +91,67 @@ const UpstreamConflictModal = ({
       next[modelName] = set;
       return next;
     });
-  };
+  }, []);
+
+  // 构造数据源与过滤后的数据源
+  const dataSource = useMemo(
+    () =>
+      (conflicts || []).map((c) => ({
+        key: c.model_name,
+        model_name: c.model_name,
+        fields: c.fields || [],
+      })),
+    [conflicts],
+  );
+
+  const filteredDataSource = useMemo(() => {
+    const kw = (searchKeyword || '').toLowerCase();
+    if (!kw) return dataSource;
+    return dataSource.filter((item) =>
+      (item.model_name || '').toLowerCase().includes(kw),
+    );
+  }, [dataSource, searchKeyword]);
+
+  // 列头工具：当前过滤范围内可操作的行集合/勾选状态/批量设置
+  const getPresentRowsForField = useCallback(
+    (fieldKey) =>
+      (filteredDataSource || []).filter((row) =>
+        (row.fields || []).some((f) => f.field === fieldKey),
+      ),
+    [filteredDataSource],
+  );
+
+  const getHeaderState = useCallback(
+    (fieldKey) => {
+      const presentRows = getPresentRowsForField(fieldKey);
+      const selectedCount = presentRows.filter((row) =>
+        selections[row.model_name]?.has(fieldKey),
+      ).length;
+      const allCount = presentRows.length;
+      return {
+        headerChecked: allCount > 0 && selectedCount === allCount,
+        headerIndeterminate: selectedCount > 0 && selectedCount < allCount,
+        hasAny: allCount > 0,
+      };
+    },
+    [getPresentRowsForField, selections],
+  );
+
+  const applyHeaderChange = useCallback(
+    (fieldKey, checked) => {
+      setSelections((prev) => {
+        const next = { ...prev };
+        getPresentRowsForField(fieldKey).forEach((row) => {
+          const set = new Set(next[row.model_name] || []);
+          if (checked) set.add(fieldKey);
+          else set.delete(fieldKey);
+          next[row.model_name] = set;
+        });
+        return next;
+      });
+    },
+    [getPresentRowsForField],
+  );
 
   const columns = useMemo(() => {
     const base = [
@@ -100,37 +167,11 @@ const UpstreamConflictModal = ({
       const rawLabel = FIELD_LABELS[fieldKey] || fieldKey;
       const label = t(rawLabel);
 
-      // 统计列头复选框状态（仅统计存在该字段冲突的行）
-      const presentRows = (conflicts || []).filter((row) =>
-        (row.fields || []).some((f) => f.field === fieldKey),
-      );
-      const selectedCount = presentRows.filter((row) =>
-        selections[row.model_name]?.has(fieldKey),
-      ).length;
-      const allCount = presentRows.length;
-      if (allCount === 0) {
-        return null; // 若此字段在所有行中都不存在，则不展示该列
-      }
-      const headerChecked = allCount > 0 && selectedCount === allCount;
-      const headerIndeterminate = selectedCount > 0 && selectedCount < allCount;
-
-      const onHeaderChange = (e) => {
-        const checked = e?.target?.checked;
-        setSelections((prev) => {
-          const next = { ...prev };
-          (conflicts || []).forEach((row) => {
-            const hasField = (row.fields || []).some(
-              (f) => f.field === fieldKey,
-            );
-            if (!hasField) return;
-            const set = new Set(next[row.model_name] || []);
-            if (checked) set.add(fieldKey);
-            else set.delete(fieldKey);
-            next[row.model_name] = set;
-          });
-          return next;
-        });
-      };
+      const { headerChecked, headerIndeterminate, hasAny } =
+        getHeaderState(fieldKey);
+      if (!hasAny) return null;
+      const onHeaderChange = (e) =>
+        applyHeaderChange(fieldKey, e?.target?.checked);
 
       return {
         title: (
@@ -194,13 +235,20 @@ const UpstreamConflictModal = ({
     });
 
     return [...base, ...cols.filter(Boolean)];
-  }, [t, selections, conflicts]);
+  }, [
+    t,
+    selections,
+    filteredDataSource,
+    getHeaderState,
+    applyHeaderChange,
+    toggleField,
+  ]);
 
-  const dataSource = conflicts.map((c) => ({
-    key: c.model_name,
-    model_name: c.model_name,
-    fields: c.fields || [],
-  }));
+  const pagedDataSource = useMemo(() => {
+    const start = (currentPage - 1) * MODEL_TABLE_PAGE_SIZE;
+    const end = start + MODEL_TABLE_PAGE_SIZE;
+    return filteredDataSource.slice(start, end);
+  }, [filteredDataSource, currentPage]);
 
   const handleOk = async () => {
     const payload = Object.entries(selections)
@@ -236,12 +284,41 @@ const UpstreamConflictModal = ({
           <div className='mb-3 text-[var(--semi-color-text-2)]'>
             {t('仅会覆盖你勾选的字段，未勾选的字段保持本地不变。')}
           </div>
-          <Table
-            columns={columns}
-            dataSource={dataSource}
-            pagination={false}
-            scroll={{ x: 'max-content' }}
-          />
+          {/* 搜索框 */}
+          <div className='flex items-center justify-end gap-2 w-full mb-4'>
+            <Input
+              placeholder={t('搜索模型...')}
+              value={searchKeyword}
+              onChange={(v) => {
+                setSearchKeyword(v);
+                setCurrentPage(1);
+              }}
+              className='!w-full'
+              prefix={<IconSearch />}
+              showClear
+            />
+          </div>
+          {filteredDataSource.length > 0 ? (
+            <Table
+              columns={columns}
+              dataSource={pagedDataSource}
+              pagination={{
+                currentPage: currentPage,
+                pageSize: MODEL_TABLE_PAGE_SIZE,
+                total: filteredDataSource.length,
+                showSizeChanger: false,
+                onPageChange: (page) => setCurrentPage(page),
+              }}
+              scroll={{ x: 'max-content' }}
+            />
+          ) : (
+            <Empty
+              description={
+                searchKeyword ? t('未找到匹配的模型') : t('无冲突项')
+              }
+              className='p-6'
+            />
+          )}
         </>
       )}
     </Modal>