feat(webapp): add optimization advice section to report UI

- index.html: add section ⑤ advice block (hidden by default, shown when advice_markdown present)
- report.js: add renderAdvice() called in render(), simple Markdown→HTML converter
- app.js: add noise_sensitivity / factual_correctness / semantic_similarity to shortMetric map
- app.css: add .advice-panel, .advice-badge, .advice-md styles (purple left-border theme)

Co-Authored-By: Claude <noreply@anthropic.com>

webapp/static/css/app.css

@@ -301,3 +301,27 @@ table.group-table td { border-bottom: 1px solid #f1f5f9; font-variant-numeric: t
 .llm-role-row { display: flex; align-items: center; gap: 14px; }
 .llm-role-label { font-size: 13px; font-weight: 600; min-width: 180px; color: var(--ink); }
 .llm-role-select { min-width: 240px; }
+
+/* ---------- ⑤ 优化建议面板 ---------- */
+.advice-panel { border-left: 3px solid #7c3aed; }
+.advice-header {
+  display: flex; align-items: center; gap: 10px;
+  margin-bottom: 14px;
+}
+.advice-badge {
+  background: #7c3aed; color: #fff;
+  font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
+  padding: 3px 8px; border-radius: 4px; text-transform: uppercase;
+}
+.advice-model { font-size: 12px; color: var(--slate); }
+.advice-body { line-height: 1.7; color: var(--ink); }
+.advice-md h1 { font-size: 16px; font-weight: 700; margin: 16px 0 8px; color: var(--ink); }
+.advice-md h2 {
+  font-size: 14px; font-weight: 700; margin: 20px 0 8px;
+  padding-bottom: 4px; border-bottom: 1px solid var(--line); color: var(--ink-soft);
+}
+.advice-md h3 { font-size: 13px; font-weight: 600; margin: 12px 0 6px; color: var(--slate); }
+.advice-md hr { border: none; border-top: 1px solid var(--line); margin: 14px 0; }
+.advice-md ul { padding-left: 20px; margin: 6px 0; }
+.advice-md li { margin: 3px 0; font-size: 13px; }
+.advice-md strong { color: var(--ink); font-weight: 600; }

webapp/static/index.html

@@ -135,6 +135,18 @@
           <!-- ④ 最低分样本逐条复核 -->
           <div class="section-label">④ 最低分样本（点击展开逐条复核）</div>
           <div class="lowest-table" id="lowest-table"></div>
+
+          <!-- ⑤ 优化建议（optimization_advisor: true 时显示） -->
+          <div id="advice-section" hidden>
+            <div class="section-label">⑤ 优化建议 OPTIMIZATION ADVICE</div>
+            <div class="panel advice-panel">
+              <div class="advice-header">
+                <span class="advice-badge">AI 诊断报告</span>
+                <span class="advice-model" id="advice-model-label"></span>
+              </div>
+              <div class="advice-body" id="advice-body"></div>
+            </div>
+          </div>
         </div>
       </section>
 

webapp/static/js/app.js

@@ -119,6 +119,9 @@ const App = {
       answer_relevancy: "ans.rel.",
       context_recall: "ctx.recall",
       context_precision: "ctx.prec.",
+      noise_sensitivity: "noise.sens.",
+      factual_correctness: "fact.corr.",
+      semantic_similarity: "sem.sim.",
     };
     return map[name] || name;
   },

webapp/static/js/report.js

@@ -26,6 +26,7 @@ const Report = {
       Report.renderDistribution(detail.report);
       Report.renderGroupings(detail.report);
       Report.renderLowest(detail.report);
+      Report.renderAdvice(detail.summary, detail.report);
       content.style.opacity = "1";
     } catch (err) {
       empty.hidden = false;
@@ -186,8 +187,7 @@ const Report = {
   },
 
   // ④ 最低分样本逐条复核表（点击展开）。
-  renderLowest(report) {
-    const wrap = document.getElementById("lowest-table");
+  renderLowest(report) {    const wrap = document.getElementById("lowest-table");
     const samples = report.lowest_samples || [];
     wrap.innerHTML = "";
     if (samples.length === 0) {
@@ -255,4 +255,35 @@ const Report = {
       </div>
     `;
   },
+
+  // ⑤ 优化建议（仅 optimization_advice.md 存在时渲染）。
+  renderAdvice(summary, report) {
+    const section = document.getElementById("advice-section");
+    const body = document.getElementById("advice-body");
+    const modelLabel = document.getElementById("advice-model-label");
+
+    const md = report.advice_markdown || "";
+    if (!md.trim()) {
+      section.hidden = true;
+      return;
+    }
+
+    section.hidden = false;
+    modelLabel.textContent = summary.judge_model ? `judge: ${summary.judge_model}` : "";
+
+    // 简单 Markdown → HTML 转换（标题、列表、分隔线、粗体）
+    const escaped = md
+      .replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+    const html = escaped
+      .replace(/^#{3}\s+(.+)$/gm, "<h3>$1</h3>")
+      .replace(/^#{2}\s+(.+)$/gm, "<h2>$1</h2>")
+      .replace(/^#{1}\s+(.+)$/gm, "<h1>$1</h1>")
+      .replace(/^---+$/gm, "<hr>")
+      .replace(/\*\*(.+?)\*\*/g, "<strong>$1</strong>")
+      .replace(/^- (.+)$/gm, "<li>$1</li>")
+      .replace(/(<li>[^]*?<\/li>\n?)+/g, (m) => `<ul>${m}</ul>`)
+      .replace(/\n\n+/g, "\n<br>\n");
+
+    body.innerHTML = `<div class="advice-md">${html}</div>`;
+  },
 };