docs: add screenshot below hero section for visibility

MiniCodeMonkey · MiniCodeMonkey · commit 5e2cdb89085e · 2026-01-29T19:27:13.000+01:00
diff --git a/docs/index.md b/docs/index.md
@@ -17,3 +17,7 @@ hero:
       text: View on GitHub
       link: https://github.com/minicodemonkey/chief
 ---
+
+<div style="max-width: 800px; margin: 2rem auto; padding: 0 1rem;">
+  <img src="/images/tui-screenshot.png" alt="Chief TUI" style="border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.3);" />
+</div>
