feat: include evidence boundaries in report export

frontend/src/app/page.tsx

@@ -45,6 +45,7 @@ import {
 import { defaultGuidedJyotishTopics } from "@/lib/guided-jyotish-topics";
 import { keepFocusWithin } from "@/lib/focus-trap";
 import { chatMessageViews, type ChatMessage } from "@/lib/chat-message-view";
+import { consultationReportMarkdown } from "@/lib/consultation-report-export";
 import {
   OnboardingAuthenticationError,
   type OnboardingContent,
@@ -1292,11 +1293,15 @@ export default function Home() {
       message_count: session.messages.length,
       messages: session.messages.map((message) => ({ role: message.role, text: message.text })),
     };
+    const reportMarkdown = consultationReportMarkdown({ title: session.title, messages: session.messages });
     const transcript = [
       `Jyotisha 对话：${session.title}`,
       "",
       ...session.messages.map((message) => `${message.role === "user" ? "我" : "Jyotisha"}：${message.text}`),
       "",
+      "---- Markdown 报告 ----",
+      reportMarkdown,
+      "",
       "---- JSON 分享包 ----",
       JSON.stringify(sharePayload, null, 2),
     ].join("\n");

frontend/src/lib/consultation-report-export.ts

@@ -0,0 +1,25 @@
+import type { ChatMessage } from "./chat-message-view";
+
+export function consultationReportMarkdown(input: {
+  title: string;
+  messages: readonly ChatMessage[];
+}) {
+  const latestAssistant = [...input.messages].reverse().find((message) => message.role === "assistant");
+  const evidence = latestAssistant?.workflowReceipt;
+  return [
+    `# ${input.title}`,
+    "",
+    "## 最新回答",
+    latestAssistant?.text || "暂无回答。",
+    "",
+    "## Claim boundary",
+    `technique_truth: ${latestAssistant?.techniqueTruth || "unknown"}`,
+    evidence ? `workflow_route: ${evidence.route}` : "workflow_route: unknown",
+    evidence ? `workflow_status: ${evidence.status}` : "workflow_status: unknown",
+    evidence ? `precise_timing: ${evidence.preciseTiming}` : "precise_timing: unknown",
+    evidence ? `missing_layers: ${evidence.missingLayers.join(" / ") || "none"}` : "missing_layers: unknown",
+    "",
+    "## Boundary",
+    "本报告保留证据边界；未闭环内容不得包装成确定预测。",
+  ].join("\n");
+}