fix: stabilize agent UI and SCADA card

app/globals.css

@@ -324,6 +324,16 @@ input:focus-visible {
   border-color: var(--acrylic-border);
 }
 
+.agent-panel-header {
+  position: relative;
+  z-index: 1;
+  border-top-left-radius: inherit;
+  border-top-right-radius: inherit;
+  box-shadow:
+    inset 0 1px 0 rgba(255, 255, 255, 0.86),
+    0 10px 24px rgba(15, 23, 42, 0.07);
+}
+
 .agent-panel-band {
   background: var(--surface-control);
 }
@@ -507,7 +517,6 @@ input:focus-visible {
     agent-panel-reveal 170ms cubic-bezier(0.22, 1, 0.36, 1),
     agent-panel-fade 150ms ease-out;
   transform-origin: left top;
-  will-change: opacity, transform;
 }
 
 .agent-panel-collapse {
@@ -516,7 +525,6 @@ input:focus-visible {
     agent-panel-dim 150ms ease-in forwards;
   pointer-events: none;
   transform-origin: left top;
-  will-change: opacity, transform;
 }
 
 .agent-rail-enter {
@@ -524,7 +532,6 @@ input:focus-visible {
     agent-rail-shell 170ms cubic-bezier(0.22, 1, 0.36, 1),
     agent-panel-fade 130ms ease-out;
   transform-origin: left top;
-  will-change: opacity, transform;
 }
 
 .agent-rail-item {