style: Update CSS for radar component and modal z-index for improved layering

Author: 02loveslollipop

visual_controller/frontend/src/components/radar/RadarCanvas.css

@@ -4,6 +4,8 @@ canvas { width: 100%; max-width: 100%; height: auto; border-radius: 50%; backgro
   display: flex;
   flex-direction: column;
   gap: 0.75rem;
+  overflow: hidden;
+  width: 100%;
 }
 
 .radar-meta {

visual_controller/frontend/src/pages/NtController.css

@@ -54,10 +54,11 @@
   display: flex;
   align-items: center;
   justify-content: center;
-  z-index: 20;
+  z-index: 1200;
 }
 
 .nt-modal {
+  z-index: 1201;
   background: rgba(10, 18, 32, 0.95);
   border: 1px solid rgba(59, 130, 246, 0.4);
   box-shadow: 0 32px 60px rgba(15, 23, 42, 0.65);