fix: harden AI analysis provider responses

modules/ai/server/analysis.ts

@@ -30,6 +30,7 @@ function createChatModel(config: { baseUrl: string; apiKey: string; chatModel: s
   return new ChatOpenAI({
     apiKey: config.apiKey,
     model: config.chatModel,
+    maxTokens: 1800,
     temperature: 0.2,
     configuration,
   });
@@ -241,6 +242,7 @@ export async function generateElderAiAnalysis(
     "输出 JSON 字段：overallRiskLevel(low|medium|high|critical|unknown), summary, keyFindings, recommendations, dataGaps, citations, confidence, modelSummary。",
     "keyFindings[] 字段：category, severity(info|warning|critical), evidence, citationIds。",
     "recommendations[] 字段：title, priority(low|normal|high|urgent), rationale, suggestedNextStep, citationIds。",
+    "citations[] 只返回你实际引用过的 citation 对象，citationIds 必须来自可用 citations。",
     knowledgeUnavailableReason ? `知识库检索不可用：${knowledgeUnavailableReason}。请在 dataGaps 中包含“知识库检索不可用，分析未使用内部知识库”。` : "",
     `modelSummary 固定为 {"provider":"openai-compatible","chatModel":"${runtimeConfig.config.chatModel}","embeddingModel":"${runtimeConfig.config.embeddingModel}"}。`,
     `可用 citations：${JSON.stringify(citations)}`,
@@ -250,7 +252,9 @@ export async function generateElderAiAnalysis(
 
   let rawOutput: unknown;
   try {
-    const response = await model.invoke(prompt);
+    const response = await model.invoke(prompt, {
+      response_format: { type: "json_object" },
+    });
     const content = Array.isArray(response.content)
       ? response.content.map((item) => (typeof item === "string" ? item : "")).join("\n")
       : String(response.content);