feat: migrate runtime backend to node server

src/services/runtimeItemAiDirector.ts

@@ -4,6 +4,7 @@ import type {
   RuntimeItemGenerationContext,
   RuntimeItemPlan,
 } from '../types';
+import { requestJson } from './apiClient';
 import {requestChatMessageContent} from './llmClient';
 import {parseJsonResponseText} from './llmParsers';
 import {
@@ -88,6 +89,28 @@ export async function generateRuntimeItemAiIntents(params: {
     buildRuntimeItemAiIntent(params.context, plan),
   );
 
+  if (typeof window !== 'undefined') {
+    try {
+      const response = await requestJson<{
+        intents?: unknown[];
+      }>(
+        '/api/runtime/items/runtime-intent',
+        {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify(params),
+        },
+        '运行时物品意图生成失败',
+      );
+      const rawIntents = Array.isArray(response.intents) ? response.intents : [];
+      return params.plans.map((_, index) =>
+        sanitizeRuntimeItemAiIntent(rawIntents[index], fallbackIntents[index]!),
+      );
+    } catch (error) {
+      console.warn('[runtimeItemAiDirector] backend intent generation failed, falling back', error);
+    }
+  }
+
   const content = await requestChatMessageContent(
     RUNTIME_ITEM_INTENT_SYSTEM_PROMPT,
     buildRuntimeItemIntentPrompt(params),