fix(viewer): make recorded layers deterministic

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

@@ -128,6 +128,51 @@ test("recorded autoplay waits for the full range and then runs exactly once", ()
   assert.equal(gate.attempted(), true);
 });
 
+test("recorded autoplay starts at the first presentable camera frame without shrinking the range", () => {
+  const gate = createRecordedAutoplayGate();
+  const seeks = [];
+  const range = { min: 0, max: 535_717_620_042 };
+
+  assert.equal(gate.attempt(
+    true,
+    true,
+    true,
+    range,
+    (value) => seeks.push(value),
+    () => {},
+    35_421_857_292,
+  ), true);
+  assert.deepEqual(seeks, [35_421_857_292]);
+  assert.deepEqual(range, { min: 0, max: 535_717_620_042 });
+});
+
+test("recorded autoplay clamps an invalid presentation start to the admitted archive", () => {
+  const before = createRecordedAutoplayGate();
+  const after = createRecordedAutoplayGate();
+  const seeks = [];
+  const range = { min: 5, max: 10 };
+
+  assert.equal(before.attempt(
+    true,
+    true,
+    true,
+    range,
+    (value) => seeks.push(value),
+    () => {},
+    -50,
+  ), true);
+  assert.equal(after.attempt(
+    true,
+    true,
+    true,
+    range,
+    (value) => seeks.push(value),
+    () => {},
+    50,
+  ), true);
+  assert.deepEqual(seeks, [5, 10]);
+});
+
 test("a failed vendor autoplay attempt is consumed instead of rewinding later", () => {
   const gate = createRecordedAutoplayGate();
   let seeks = 0;