fix(k1): harden live handoff and camera recovery

apps/control-station/test/k1SupervisorPresentation.test.mjs

@@ -72,6 +72,7 @@ let transportRefEquivalenceKey;
 let shouldRevealProvisioningNetworkStep;
 let retiredPhysicalReopenAuthority;
 let SnapshotRuntimeActionArbiter;
+let runtimeActionResponseAlreadyAccepted;
 let connectionActionAuthoritySnapshot;
 let exactAppliedNetworkIntentCompleted;
 let selectMonotonicXgridsState;
@@ -106,6 +107,7 @@ before(async () => {
     SnapshotRuntimeActionArbiter,
     connectionActionAuthoritySnapshot,
     exactAppliedNetworkIntentCompleted,
+    runtimeActionResponseAlreadyAccepted,
   } = await server.ssrLoadModule(
     "@xgrids-k1/frontend/useXgridsK1Runtime.ts",
   ));
@@ -2026,6 +2028,27 @@ test("K1 runtime replacement retires A and isolates a new B action from late set
   assert.equal(pendingAction, null);
 });
 
+test("successful action response may be superseded only by the same runtime revision", () => {
+  const response = {
+    snapshot_runtime_id: "runtime-a",
+    snapshot_revision: 41,
+  };
+
+  assert.equal(runtimeActionResponseAlreadyAccepted(response, {
+    snapshot_runtime_id: "runtime-a",
+    snapshot_revision: 42,
+  }), true);
+  assert.equal(runtimeActionResponseAlreadyAccepted(response, {
+    snapshot_runtime_id: "runtime-a",
+    snapshot_revision: 40,
+  }), false);
+  assert.equal(runtimeActionResponseAlreadyAccepted(response, {
+    snapshot_runtime_id: "runtime-b",
+    snapshot_revision: 99,
+  }), false);
+  assert.equal(runtimeActionResponseAlreadyAccepted(response, null), false);
+});
+
 test("explicit scenario reset B supersedes pending callback A in one runtime", () => {
   const arbiter = new SnapshotRuntimeActionArbiter();
   const actionA = arbiter.begin(12);