Vendor templates and prefer local template assets

templates/blocks/visuals/flow-arrow-horizontal.html

@@ -0,0 +1,34 @@
+<!-- 가로 흐름도: 좌→우 화살표로 연결된 단계 (SVG) -->
+<!--
+  📋 flow-arrow-horizontal
+  ─────────────────
+  용도: 발전 과정, 기술 진화, 전환 흐름 (A → B → C)
+  슬롯: steps[] (각 단계에 label, sub)
+  Figma 원본: 2-3_03 "GIS ↔ SPCC → 토공 → ..." / 2-2_04 개발 패러다임
+-->
+<div class="block-flow-h">
+  <svg viewBox="0 0 {{ steps|length * 180 }} 80" width="100%" xmlns="http://www.w3.org/2000/svg" font-family="Pretendard Variable, sans-serif">
+    {% for step in steps %}
+    {% set x = loop.index0 * 180 + 70 %}
+    <rect x="{{ x - 60 }}" y="10" width="120" height="50" rx="25" fill="{{ step.color | default('#2563eb') }}" opacity="0.9" />
+    <text x="{{ x }}" y="32" text-anchor="middle" fill="white" font-size="13" font-weight="700">{{ step.label }}</text>
+    {% if step.sub %}
+    <text x="{{ x }}" y="48" text-anchor="middle" fill="white" font-size="10" opacity="0.8">{{ step.sub }}</text>
+    {% endif %}
+    {% if not loop.last %}
+    <polygon points="{{ x + 65 }},35 {{ x + 80 }},35 {{ x + 75 }},28" fill="#94a3b8" />
+    <polygon points="{{ x + 65 }},35 {{ x + 80 }},35 {{ x + 75 }},42" fill="#94a3b8" />
+    {% endif %}
+    {% endfor %}
+  </svg>
+</div>
+
+<style>
+.block-flow-h {
+  padding: 10px 0;
+  overflow-x: auto;
+}
+.block-flow-h svg {
+  min-width: 400px;
+}
+</style>