feat: complete platform operations roadmap

public/course-placeholder.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1600 900" role="img" aria-labelledby="title desc">
+  <title id="title">Compor HUB course cover placeholder</title>
+  <desc id="desc">Dark neutral course cover with an orange Compor HUB accent.</desc>
+  <defs><linearGradient id="bg" x1="0" x2="1" y1="0" y2="1"><stop stop-color="#1d1d20"/><stop offset="1" stop-color="#09090b"/></linearGradient></defs>
+  <rect width="1600" height="900" fill="url(#bg)"/>
+  <circle cx="800" cy="450" r="180" fill="#ff6b18" opacity=".15"/><circle cx="800" cy="450" r="110" fill="none" stroke="#ff6b18" stroke-width="6" opacity=".7"/>
+  <text x="800" y="475" fill="#ffffff" font-family="Arial, sans-serif" font-size="58" font-weight="700" text-anchor="middle">compor <tspan fill="#ff6b18">HUB</tspan></text>
+</svg>