fix(codebase): constrain layout to 100vh so left and right panes scroll internally instead of the window

vibn-frontend/app/[workspace]/project/[projectId]/(home)/code/page.tsx

@@ -382,6 +382,8 @@ const grid: React.CSSProperties = {
   display: "grid",
   gridTemplateColumns: "300px minmax(0, 1fr)",
   alignItems: "stretch",
+  flex: 1,
+  minHeight: 0,
 };
 
 const leftCol: React.CSSProperties = {
@@ -391,6 +393,7 @@ const leftCol: React.CSSProperties = {
   gap: 24,
   borderRight: `1px solid ${THEME.borderSoft}`,
   padding: "20px",
+  overflowY: "auto",
 };
 
 const rightCol: React.CSSProperties = {