feat(admin): LLM config, knowledge base, and WeCom AI binding

Add owner-scoped model API settings, uploadable knowledge bases, and WeCom bot AI/KB wiring with OpenAI-compatible URL normalization.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/integrations/wecom/wecom-bot-actions.service.ts

@@ -95,6 +95,13 @@ export class WecomBotActionsService {
         '',
       );
     }
+    if (bot.aiEnabled && bot.llmConfigId) {
+      lines.push(
+        '**智能问答**',
+        '未匹配指令的自然语言将交由绑定的语言模型回答（可挂知识库）',
+        '',
+      );
+    }
     lines.push(`当前权限：${bot.permissions.join(', ') || '无'}`);
     return lines.join('\n');
   }
@@ -103,7 +110,8 @@ export class WecomBotActionsService {
     bot: WecomBotRuntimeConfig,
     wecomUserId: string,
     text: string,
-  ): Promise<string> {
+    opts?: { skipNaturalFallback?: boolean },
+  ): Promise<string | null> {
     const content = text.trim();
     if (!content) return this.buildHelp(bot);
 
@@ -152,14 +160,19 @@ export class WecomBotActionsService {
       return this.queryHandbook(q);
     }
 
-    // 自然语言手册（仅团队助手有 handbook 权限时）
-    if (wecomBotHasPermission(bot, 'handbook.query') && content.length >= 2) {
+    // 自然语言手册（仅团队助手有 handbook 权限时；开启 AI 时改由模型+知识库回答）
+    if (
+      !opts?.skipNaturalFallback &&
+      wecomBotHasPermission(bot, 'handbook.query') &&
+      content.length >= 2
+    ) {
       const hit = searchHandbook(content, 1);
       if (hit.length) {
         return formatHandbook(hit);
       }
     }
 
+    if (opts?.skipNaturalFallback) return null;
     return `未识别指令。\n\n${this.buildHelp(bot)}`;
   }