feat: add safe rich content rendering for student flows

apps/taro/src/pages/student/student.css

@@ -156,6 +156,40 @@
   border-top: 1px solid #e2e8f0;
 }
 
+.option-line {
+  display: flex;
+  align-items: flex-start;
+  gap: 10px;
+  min-width: 0;
+}
+
+.option-prefix {
+  flex: 0 0 auto;
+  color: #0f172a;
+  font-size: 26px;
+  font-weight: 850;
+  line-height: 1.55;
+}
+
+.option-rich {
+  flex: 1;
+  min-width: 0;
+}
+
+.answer-detail {
+  margin-top: 16px;
+  padding-top: 14px;
+  border-top: 1px solid #e2e8f0;
+}
+
+.answer-detail-label {
+  display: block;
+  margin-bottom: 8px;
+  color: #334155;
+  font-size: 22px;
+  font-weight: 820;
+}
+
 .row-main {
   display: block;
   color: #111827;
@@ -303,6 +337,21 @@
   font-weight: 750;
 }
 
+.status-badge.danger {
+  background: #fff1f2;
+  color: #be123c;
+}
+
+.handbook-entry-body {
+  margin-top: 14px;
+}
+
+.report-sub-result {
+  margin-top: 14px;
+  padding-top: 12px;
+  border-top: 1px dashed #cbd5e1;
+}
+
 .answer-sheet {
   display: grid;
   grid-template-columns: repeat(5, minmax(0, 1fr));