fix(ui): remove whitespace between components for integrated layout

ui/src/pages/Dashboard/Dashboard.module.css

@@ -2,7 +2,6 @@
 .content {
   flex: 1;
   overflow-y: auto;
-  padding: 20px 24px 40px;
   min-width: 0;
   background: var(--bg-body);
 }
@@ -15,9 +14,7 @@
 /* Table section */
 .tableSection {
   background: var(--bg-surface);
-  border: 1px solid var(--border-subtle);
-  border-radius: var(--radius-lg);
-  box-shadow: var(--shadow-card);
+  border-bottom: 1px solid var(--border-subtle);
   overflow: hidden;
 }
 
@@ -25,7 +22,7 @@
   display: flex;
   align-items: center;
   justify-content: space-between;
-  padding: 12px 16px;
+  padding: 8px 12px;
   border-bottom: 1px solid var(--border-subtle);
 }