fix(dashboard): remove top PageHeader from Databases page to maximize vertical space

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

@@ -72,13 +72,6 @@ export default function DataTablesPage() {
           minHeight: 0,
         }}
       >
-        <div style={{ padding: "20px 24px" }}>
-          <PageHeader
-            title="Databases"
-            subtitle="Explore the raw schema and rows in your project databases."
-          />
-        </div>
-
         <div
           style={{
             display: "grid",
@@ -86,7 +79,6 @@ export default function DataTablesPage() {
             alignItems: "stretch",
             flex: 1,
             minHeight: 0,
-            borderTop: `1px solid ${THEME.borderSoft}`,
           }}
         >
           {/* ── Left rail ── */}