[taskboard] refactor tasks into full-page workspace

app/tasks/layout.tsx

@@ -0,0 +1,14 @@
+import { TasksSubnav } from "@/components/tasks-subnav";
+
+export default function TasksLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <div className="min-w-0">
+      <TasksSubnav />
+      {children}
+    </div>
+  );
+}