feat: render AI response as markdown (marked.js)

dashboard.html

@@ -151,7 +151,41 @@ body { font-family: var(--font-base); background: var(--color-bg); color: var(--
 .spinner { width: 18px; height: 18px; border: 2px solid var(--color-border); border-top-color: var(--color-brand); border-radius: 50%; animation: spin 0.7s linear infinite; flex-shrink: 0; }
 @keyframes spin { to { transform: rotate(360deg); } }
 .ai-result.hidden { display: none; }
-#ai-text { font-size: 13px; line-height: 1.65; white-space: pre-wrap; max-height: 420px; overflow-y: auto; padding: 12px; background: var(--color-bg); border-radius: 8px; margin-bottom: 10px; }
+#ai-text {
+  font-size: 13px; line-height: 1.65;
+  max-height: 460px; overflow-y: auto;
+  padding: 14px 16px; background: var(--color-bg);
+  border-radius: 8px; margin-bottom: 10px;
+}
+/* Markdown typography inside AI response */
+#ai-text h1,#ai-text h2,#ai-text h3,#ai-text h4 {
+  font-weight: 700; color: var(--color-text-primary);
+  margin: 14px 0 6px; line-height: 1.3;
+}
+#ai-text h1 { font-size: 15px; border-bottom: 1px solid var(--color-border); padding-bottom: 4px; }
+#ai-text h2 { font-size: 14px; }
+#ai-text h3 { font-size: 13px; color: var(--color-brand); }
+#ai-text h4 { font-size: 13px; color: var(--color-text-secondary); }
+#ai-text p  { margin: 6px 0; }
+#ai-text ul,#ai-text ol { margin: 6px 0 6px 18px; }
+#ai-text li { margin: 3px 0; }
+#ai-text li::marker { color: var(--color-brand); }
+#ai-text strong { font-weight: 700; color: var(--color-text-primary); }
+#ai-text em { font-style: italic; color: var(--color-text-secondary); }
+#ai-text code {
+  font-family: var(--font-mono); font-size: 11px;
+  background: rgba(0,82,204,0.08); color: var(--color-brand);
+  padding: 1px 5px; border-radius: 4px;
+}
+#ai-text blockquote {
+  border-left: 3px solid var(--color-brand);
+  margin: 8px 0; padding: 4px 12px;
+  color: var(--color-text-secondary); background: rgba(0,82,204,0.04);
+  border-radius: 0 6px 6px 0;
+}
+#ai-text hr { border: none; border-top: 1px solid var(--color-border); margin: 10px 0; }
+#ai-text > *:first-child { margin-top: 0; }
+#ai-text > *:last-child  { margin-bottom: 0; }
 .btn-copy { width: 100%; padding: 8px; background: var(--color-bg); color: var(--color-text-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-btn); font-size: 13px; font-weight: 500; cursor: pointer; font-family: var(--font-base); transition: all 0.15s; }
 .btn-copy:hover { border-color: var(--color-brand); color: var(--color-brand); }
 .ai-error { font-size: 13px; color: var(--color-red); background: var(--color-red-bg); padding: 10px 12px; border-radius: 8px; margin-top: 8px; }
@@ -308,6 +342,7 @@ body { font-family: var(--font-base); background: var(--color-bg); color: var(--
   </div>
 </div>
 
+<script src="https://cdn.jsdelivr.net/npm/marked@12/marked.min.js"></script>
 <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.3/dist/chart.umd.min.js"></script>
 <script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-annotation@3.0.1/dist/chartjs-plugin-annotation.min.js"></script>
 <script>
@@ -1156,7 +1191,17 @@ async function runAiAnalysis() {
 }
 
 function showAiLoading(show){document.getElementById('ai-loading').classList.toggle('hidden',!show);}
-function showAiResult(text){document.getElementById('ai-text').textContent=text;document.getElementById('ai-result').classList.remove('hidden');}
+function showAiResult(text){
+  const el = document.getElementById('ai-text');
+  if (window.marked) {
+    // Configure marked: safe renderer, no mangling
+    marked.setOptions({ breaks: true, gfm: true });
+    el.innerHTML = marked.parse(text);
+  } else {
+    el.textContent = text; // fallback if CDN failed
+  }
+  document.getElementById('ai-result').classList.remove('hidden');
+}
 function showAiError(msg){const el=document.getElementById('ai-error');if(msg){el.textContent=msg;el.classList.remove('hidden');}else el.classList.add('hidden');}
 function restoreAiCache(){const c=sessionStorage.getItem('lastAiResponse');if(c)showAiResult(c);}