fix(k1): stabilize live recovery and media admission

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

@@ -1199,7 +1199,7 @@ test("camera startup watchdog replaces an open-but-silent MSE or WebSocket", ()
   );
 });
 
-test("first media starts one non-sliding first-playable-frame deadline", () => {
+test("continuing media extends the first-playable-frame deadline", () => {
   const scheduled = new Map();
   const cancelled = [];
   const timeouts = [];
@@ -1228,8 +1228,14 @@ test("first media starts one non-sliding first-playable-frame deadline", () => {
   assert.equal(scheduled.get(playableHandle).timeoutMs, CAMERA_FIRST_PLAYABLE_FRAME_TIMEOUT_MS);
 
   watchdog.markMediaReceived();
-  assert.equal(nextHandle - 1, playableHandle, "later fragments must not extend the deadline");
-  scheduled.get(playableHandle).callback();
+  const extendedPlayableHandle = nextHandle - 1;
+  assert.notEqual(extendedPlayableHandle, playableHandle);
+  assert.deepEqual(cancelled, [10, playableHandle]);
+  assert.equal(
+    scheduled.get(extendedPlayableHandle).timeoutMs,
+    CAMERA_FIRST_PLAYABLE_FRAME_TIMEOUT_MS,
+  );
+  scheduled.get(extendedPlayableHandle).callback();
   assert.deepEqual(timeouts, ["first-playable-frame"]);
   assert.match(
     cameraStartupWatchdogRecoveryMessage("first-playable-frame"),
@@ -1306,6 +1312,7 @@ test("a laptop sleep gap reopens only the exact authoritative live camera transp
     now: 7_000,
     documentVisible: true,
     networkOnline: true,
+    transportHealthy: false,
   });
   assert.equal(wake.reopen, true);
   assert.equal(wake.state.lastReopenAt, 7_000);
@@ -1369,15 +1376,16 @@ test("visibility, pageshow and online wake burst owns one replacement decoder",
   assert.equal(secondWake.state.lastReopenAt, 18_000);
 });
 
-test("healthy visible camera heartbeats do not churn its WebSocket or decoder", () => {
+test("healthy camera survives a long main-thread heartbeat gap without decoder churn", () => {
   const authority = "camera-authority-acquisition-healthy";
   let state = initialCameraPlaybackRecoveryState(authority, 1_000);
-  for (const now of [2_000, 3_000, 4_000, 5_000]) {
+  for (const now of [2_000, 3_000, 4_000, 12_000, 25_000]) {
     const heartbeat = reduceCameraPlaybackRecovery(state, { type: "heartbeat" }, {
       activeAuthorityIdentity: authority,
       now,
       documentVisible: true,
       networkOnline: true,
+      transportHealthy: true,
     });
     assert.equal(heartbeat.reopen, false);
     state = heartbeat.state;