fix: preserve analysis bands across input workflows

tests/unit/camera.test.js

@@ -382,7 +382,12 @@ test("Camera distance shift keeps the scene and scan on one z plane", () => {
 test("Camera aligns an experiment to an imported scene without changing grid resolution", () => {
   const experiment = {
     scan: { z: 2, xMin: -1, xMax: 1, yMin: -1, yMax: 1, columns: 32, rows: 24 },
+    frequencyBands: [
+      { id: "low", minHz: 600, maxHz: 900, color: "#65f2bf" },
+      { id: "high", minHz: 1100, maxHz: 1500, color: "#58c7ff" },
+    ],
   };
+  const originalBands = structuredClone(experiment.frequencyBands);
   const imageScene = {
     sources: [{ id: "one", position: [0.2, -0.1, 4.5] }],
     image: { plane: { z: 4.5, xMin: -2, xMax: 3, yMin: -1.5, yMax: 2.5 } },
@@ -433,6 +438,11 @@ test("Camera aligns an experiment to an imported scene without changing grid res
   };
   assertEqual(alignExperimentToScene(experiment, movingScene), "source-bounds", "trajectory fallback");
   assertEqual(experiment.scan.z, 5, "trajectory depths contribute to median scan depth");
+  assertEqual(
+    JSON.stringify(experiment.frequencyBands),
+    JSON.stringify(originalBands),
+    "scene alignment preserves every analysis band",
+  );
   assertNear(experiment.scan.xMin, -2.9, 1e-12, "trajectory x minimum with padding");
   assertNear(experiment.scan.xMax, 4.9, 1e-12, "trajectory x maximum with padding");
   assertNear(experiment.scan.yMin, -4.2, 1e-12, "trajectory y minimum with padding");