feat(rag): add data-only migration option and fix dialog width

Add option to migrate knowledge base data without auto-installing
the LangRAG plugin (for offline/intranet environments). Also
narrow the migration dialog to match other confirmation dialogs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/app/home/knowledge/components/kb-migration-dialog/KBMigrationDialog.tsx

@@ -45,9 +45,9 @@ export default function KBMigrationDialog({
     },
   });
 
-  const handleStartMigration = async () => {
+  const handleMigration = async (installPlugin: boolean) => {
     try {
-      const resp = await httpClient.executeRagMigration();
+      const resp = await httpClient.executeRagMigration(installPlugin);
       asyncTask.startTask(resp.task_id);
     } catch {
       toast.error(t('knowledge.migration.error'));
@@ -77,7 +77,7 @@ export default function KBMigrationDialog({
         if (!isRunning) onOpenChange(v);
       }}
     >
-      <DialogContent className="sm:max-w-[500px]">
+      <DialogContent className="sm:max-w-md">
         <DialogHeader>
           <DialogTitle>{t('knowledge.migration.title')}</DialogTitle>
           <DialogDescription>
@@ -87,18 +87,13 @@ export default function KBMigrationDialog({
 
         <div className="py-4 space-y-3">
           {!isRunning && !isError && (
-            <>
-              <p className="text-sm text-muted-foreground">
-                {t('knowledge.migration.detected', {
-                  total: totalCount,
-                  internal: internalKbCount,
-                  external: externalKbCount,
-                })}
-              </p>
-              <p className="text-sm text-muted-foreground">
-                {t('knowledge.migration.installHint')}
-              </p>
-            </>
+            <p className="text-sm text-muted-foreground">
+              {t('knowledge.migration.detected', {
+                total: totalCount,
+                internal: internalKbCount,
+                external: externalKbCount,
+              })}
+            </p>
           )}
 
           {isRunning && (
@@ -122,26 +117,39 @@ export default function KBMigrationDialog({
           )}
         </div>
 
-        <DialogFooter>
-          {!isRunning && (
-            <Button
-              variant="outline"
-              onClick={handleDismiss}
-              disabled={dismissing}
-            >
-              {t('knowledge.migration.dismiss')}
-            </Button>
-          )}
+        <DialogFooter className="flex flex-col gap-2 sm:flex-col">
           {!isRunning && !isError && (
-            <Button onClick={handleStartMigration}>
-              {t('knowledge.migration.start')}
-            </Button>
+            <>
+              <Button onClick={() => handleMigration(true)} className="w-full">
+                {t('knowledge.migration.startWithInstall')}
+              </Button>
+              <Button
+                variant="outline"
+                onClick={() => handleMigration(false)}
+                className="w-full"
+              >
+                {t('knowledge.migration.startDataOnly')}
+              </Button>
+              <p className="text-xs text-muted-foreground text-center">
+                {t('knowledge.migration.dataOnlyHint')}
+              </p>
+            </>
           )}
           {isError && (
-            <Button onClick={handleStartMigration}>
+            <Button onClick={() => handleMigration(true)} className="w-full">
               {t('knowledge.migration.retry')}
             </Button>
           )}
+          {!isRunning && (
+            <Button
+              variant="ghost"
+              onClick={handleDismiss}
+              disabled={dismissing}
+              className="w-full"
+            >
+              {t('knowledge.migration.dismiss')}
+            </Button>
+          )}
         </DialogFooter>
       </DialogContent>
     </Dialog>

web/src/app/infra/http/BackendClient.ts

@@ -716,8 +716,12 @@ export class BackendClient extends BaseHttpClient {
     return this.get('/api/v1/knowledge/migration/status');
   }
 
-  public executeRagMigration(): Promise<AsyncTaskCreatedResp> {
-    return this.post('/api/v1/knowledge/migration/execute');
+  public executeRagMigration(
+    installPlugin: boolean = true,
+  ): Promise<AsyncTaskCreatedResp> {
+    return this.post('/api/v1/knowledge/migration/execute', {
+      install_plugin: installPlugin,
+    });
   }
 
   public dismissRagMigration(): Promise<object> {

web/src/i18n/locales/en-US.ts

@@ -779,9 +779,10 @@ const enUS = {
         'Legacy knowledge base data detected. Migration to the new plugin-based RAG architecture is required.',
       detected:
         'Found {{total}} knowledge base(s) to migrate ({{internal}} internal, {{external}} external).',
-      installHint:
-        'Migration will automatically install the LangRAG plugin and restore your knowledge base data. Documents and vector data will be preserved.',
-      start: 'Migrate Now',
+      startWithInstall: 'Auto-install Plugin & Migrate',
+      startDataOnly: 'Migrate Data Only',
+      dataOnlyHint:
+        '"Migrate Data Only" is for offline/intranet environments. Please install the LangRAG plugin manually before migrating.',
       dismiss: 'Skip for Now',
       running: 'Migrating knowledge bases, please wait...',
       success: 'Knowledge base migration completed',

web/src/i18n/locales/ja-JP.ts

@@ -768,9 +768,10 @@ const jaJP = {
         '旧バージョンのナレッジベースデータが検出されました。新しいプラグインベースのRAGアーキテクチャへの移行が必要です。',
       detected:
         '移行が必要なナレッジベースが{{total}}件見つかりました（内部{{internal}}件、外部{{external}}件）。',
-      installHint:
-        '移行により LangRAG プラグインが自動的にインストールされ、ナレッジベースデータが復元されます。ドキュメントとベクトルデータは保持されます。',
-      start: '今すぐ移行',
+      startWithInstall: 'プラグインを自動インストールして移行',
+      startDataOnly: 'データのみ移行',
+      dataOnlyHint:
+        '「データのみ移行」はオフライン環境向けです。事前に LangRAG プラグインを手動でインストールしてください。',
       dismiss: '後で',
       running: 'ナレッジベースを移行中です。しばらくお待ちください...',
       success: 'ナレッジベースの移行が完了しました',

web/src/i18n/locales/zh-Hans.ts

@@ -747,9 +747,9 @@ const zhHans = {
       description: '检测到旧版知识库数据，需要迁移到新的插件化 RAG 架构。',
       detected:
         '共检测到 {{total}} 个知识库需要迁移（{{internal}} 个内置知识库，{{external}} 个外部知识库）。',
-      installHint:
-        '迁移将自动安装 LangRAG 插件并恢复您的知识库数据，文档和向量数据将被保留。',
-      start: '立即迁移',
+      startWithInstall: '自动安装插件并迁移',
+      startDataOnly: '仅迁移数据',
+      dataOnlyHint: '「仅迁移数据」适合内网环境使用，请自行安装 LangRAG 插件后再迁移。',
       dismiss: '暂不迁移',
       running: '正在迁移知识库，请稍候...',
       success: '知识库迁移完成',

web/src/i18n/locales/zh-Hant.ts

@@ -727,9 +727,10 @@ const zhHant = {
       description: '檢測到舊版知識庫資料，需要遷移到新的插件化 RAG 架構。',
       detected:
         '共檢測到 {{total}} 個知識庫需要遷移（{{internal}} 個內建知識庫，{{external}} 個外部知識庫）。',
-      installHint:
-        '遷移將自動安裝 LangRAG 插件並恢復您的知識庫資料，文件和向量資料將被保留。',
-      start: '立即遷移',
+      startWithInstall: '自動安裝插件並遷移',
+      startDataOnly: '僅遷移資料',
+      dataOnlyHint:
+        '「僅遷移資料」適合內網環境使用，請自行安裝 LangRAG 插件後再遷移。',
       dismiss: '暫不遷移',
       running: '正在遷移知識庫，請稍候...',
       success: '知識庫遷移完成',