Vendor templates and prefer local template assets

templates/blocks/emphasis/callout-warning.html

@@ -0,0 +1,45 @@
+<!-- 경고 콜아웃: 주의/경고/문제점 강조 -->
+<!--
+  📋 callout-warning
+  ─────────────────
+  용도: 문제점 지적, 주의사항, 잘못된 접근 경고
+  슬롯: title (필수), description (필수), icon (선택)
+  callout-solution과 다른 점: 경고 톤 (빨간/주황), 문제 지적용
+-->
+<div class="block-callout-warn">
+  {% if icon %}<div class="cw-icon">{{ icon }}</div>{% endif %}
+  <div class="cw-body">
+    <div class="cw-title">{{ title }}</div>
+    <div class="cw-desc">{{ description }}</div>
+  </div>
+</div>
+
+<style>
+.block-callout-warn {
+  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
+  border: 2px solid #fca5a5;
+  border-radius: var(--radius);
+  padding: 20px 24px;
+  display: flex;
+  gap: 16px;
+  align-items: flex-start;
+}
+.cw-icon {
+  font-size: 2rem;
+  flex-shrink: 0;
+}
+.cw-body { flex: 1; }
+.cw-title {
+  font-size: 17px;
+  font-weight: 800;
+  color: #991b1b;
+  margin-bottom: 6px;
+}
+.cw-desc {
+  font-size: 14px;
+  color: #7f1d1d;
+  line-height: 1.7;
+  white-space: pre-line;
+  word-break: keep-all;
+}
+</style>