feat: add markdown consultation report download

frontend/src/app/globals.css

@@ -158,6 +158,7 @@ button:disabled { cursor: default; opacity: .45; }
 .raw-evidence-receipt { margin: 0 var(--space-3) var(--space-3); border-top: 1px solid color-mix(in srgb, var(--color-border) 64%, transparent); padding-top: var(--space-2); }
 .raw-evidence-receipt summary { padding: var(--space-1) 0; color: var(--color-ink-tertiary); font-size: 12px; }
 .raw-evidence-receipt pre { max-height: 180px; overflow: auto; margin: var(--space-2) 0 0; padding: var(--space-3); border-radius: var(--radius-md); background: var(--color-canvas); color: var(--color-ink-secondary); font-size: 11px; line-height: 1.5; }
+.report-download-button { margin-top: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-canvas-soft); color: var(--color-ink-secondary); cursor: pointer; padding: 7px 10px; font-size: 12px; }
 .message-markdown p { margin: 0 0 14px; }
 .message-markdown ul, .message-markdown ol { margin: 10px 0 16px; padding-left: 24px; }
 .message-markdown li { margin: 6px 0; }

frontend/src/components/chat-message-row.tsx

@@ -2,6 +2,7 @@ import { ChatMessageContent } from "@/components/chat-message-content";
 import { ClaimBoundaryBadge } from "@/components/claim-boundary-badge";
 import { EvidenceAuditPanel } from "@/components/evidence-audit-panel";
 import type { ChatMessageView } from "@/lib/chat-message-view";
+import { consultationReportMarkdown, downloadMarkdownReport } from "@/lib/consultation-report-export";
 
 export function AgentAvatar() {
   return <span className="agent-avatar" aria-hidden="true" />;
@@ -25,7 +26,7 @@ export function ChatMessageRow({ message }: { readonly message: ChatMessageView
           {message.role === "assistant" ? (
             message.state === "thinking"
               ? <div className="thinking"><i /><i /><i /></div>
-              : <><ClaimBoundaryBadge status={message.techniqueTruth} /><EvidenceAuditPanel claimStatus={message.techniqueTruth} workflowReceipt={message.workflowReceipt} /><ChatMessageContent text={message.text} /></>
+              : <><ClaimBoundaryBadge status={message.techniqueTruth} /><EvidenceAuditPanel claimStatus={message.techniqueTruth} workflowReceipt={message.workflowReceipt} /><ChatMessageContent text={message.text} /><button className="report-download-button" type="button" onClick={() => downloadMarkdownReport("Jyotisha 咨询报告", consultationReportMarkdown({ title: "Jyotisha 咨询报告", messages: [message] }))}>下载本次报告</button></>
           ) : <p>{message.text}</p>}
         </div>
       </div>

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

@@ -23,3 +23,15 @@ export function consultationReportMarkdown(input: {
     "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");
 }
+
+export function downloadMarkdownReport(title: string, markdown: string) {
+  const blob = new Blob([markdown], { type: "text/markdown;charset=utf-8" });
+  const url = URL.createObjectURL(blob);
+  const anchor = document.createElement("a");
+  anchor.href = url;
+  anchor.download = `${title.replace(/[\\/:*?"<>|]+/g, "-")}.md`;
+  document.body.append(anchor);
+  anchor.click();
+  anchor.remove();
+  URL.revokeObjectURL(url);
+}