Fix grid horizontal scroll: remove overflow-x:hidden from body

body was silently clipping all horizontal overflow. min-width:0 on
#main prevents flex child from expanding beyond container.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/style.css

@@ -41,7 +41,6 @@ body {
 	min-height: 100vh;
 	display: flex;
 	flex-direction: column;
-	overflow-x: hidden;
 }
 
 /* ===== HEADER ===== */
@@ -98,8 +97,7 @@ nav {
 #main {
 	flex: 1;
 	padding: 1.5rem;
-	width: 100%;
-	overflow-x: auto;
+	min-width: 0;
 }
 
 /* ===== SPLIT LAYOUT ===== */