feat(perception): integrate calibrated operator pipeline

Add calibrated K1 projection, recorded and near-live perception qualification, unified Rerun operator layers, bounded replay admission, audited viewer controls, worker experiments, and lab evidence.

apps/control-station/src/styles/observation.css

@@ -32,6 +32,25 @@
   backdrop-filter: blur(18px);
 }
 
+.scene-navigation-hint {
+  position: absolute;
+  z-index: 11;
+  right: 0.85rem;
+  bottom: 4.9rem;
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  border: 1px solid rgb(255 255 255 / 0.07);
+  border-radius: 999px;
+  background: rgb(9 10 13 / 0.7);
+  color: var(--nodedc-text-muted);
+  padding: 0.42rem 0.65rem;
+  font-size: 0.52rem;
+  font-weight: 680;
+  pointer-events: none;
+  backdrop-filter: blur(14px);
+}
+
 .scene-source-picker__trigger {
   position: relative;
 }
@@ -350,6 +369,11 @@ i[data-availability="error"] {
   box-shadow: 0 1.5rem 4rem rgb(0 0 0 / 0.34);
 }
 
+.floating-observation-window--hidden {
+  visibility: hidden;
+  pointer-events: none;
+}
+
 .observation-timeline {
   display: block;
   min-width: 0;