feat: add evidence audit panel shell

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

@@ -1,5 +1,6 @@
 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";
 
 export function AgentAvatar() {
@@ -24,7 +25,7 @@ export function ChatMessageRow({ message }: { readonly message: ChatMessageView
           {message.role === "assistant" ? (
             message.state === "thinking"
               ? <div className="thinking"><i /><i /><i /></div>
-              : <><ClaimBoundaryBadge status={message.techniqueTruth} /><ChatMessageContent text={message.text} /></>
+              : <><ClaimBoundaryBadge status={message.techniqueTruth} /><EvidenceAuditPanel claimStatus={message.techniqueTruth} /><ChatMessageContent text={message.text} /></>
           ) : <p>{message.text}</p>}
         </div>
       </div>

frontend/src/components/evidence-audit-panel.tsx

@@ -0,0 +1,33 @@
+type AuditRow = {
+  label: string;
+  status: "required" | "partial" | "blocked";
+  boundary: string;
+};
+
+const defaultAuditRows: AuditRow[] = [
+  { label: "D1 / Natal", status: "required", boundary: "基础命盘层" },
+  { label: "Varga: D9 / D10 / D2 / D11", status: "required", boundary: "按问题域调用，不混用" },
+  { label: "Vimshottari Dasha", status: "required", boundary: "阶段证据之一" },
+  { label: "Narayana Dasha", status: "required", boundary: "应期/校时必须交叉" },
+  { label: "Transit / Gochara", status: "partial", boundary: "精确日/月仍需 holdout" },
+  { label: "Shadbala / Ashtakavarga", status: "partial", boundary: "组件 parity 未全闭环" },
+  { label: "Functional Benefic/Malefic", status: "required", boundary: "不能只看自然吉凶" },
+  { label: "MEVG / Real Case Calibration", status: "blocked", boundary: "外部校准不足时降级" },
+];
+
+export function EvidenceAuditPanel({ claimStatus }: { readonly claimStatus?: string }) {
+  return (
+    <details className="evidence-audit-panel">
+      <summary>证据链摘要 · {claimStatus || "unknown"}</summary>
+      <div className="evidence-audit-table" role="table" aria-label="Technique Audit Table">
+        {defaultAuditRows.map((row) => (
+          <div className="evidence-audit-row" role="row" key={row.label}>
+            <span role="cell">{row.label}</span>
+            <b role="cell" data-status={row.status}>{row.status}</b>
+            <small role="cell">{row.boundary}</small>
+          </div>
+        ))}
+      </div>
+    </details>
+  );
+}