feat: daybreak finale turns the contact arrival into a sunrise with a dawn chord

tests/unit/adaptive-mixer.test.ts

@@ -17,6 +17,38 @@ function recordFor(
 }
 
 describe('adaptive mixer', () => {
+  it('sums the dawn input after the mood controls, untouched by chapter moods', () => {
+    const harness = createFakeAudioHarness();
+    const connections = new Map<unknown, unknown[]>();
+    const createGain = harness.context.createGain.bind(harness.context);
+    harness.context.createGain = () => {
+      const node = createGain();
+      const connect = node.connect.bind(node) as (target: AudioNode) => AudioNode;
+      node.connect = ((target: AudioNode) => {
+        connections.set(node, [...(connections.get(node) ?? []), target]);
+        return connect(target);
+      }) as GainNode['connect'];
+      return node;
+    };
+    const mixer = createAdaptiveMixer(harness.context, harness.destination);
+    const sum = connections.get(mixer.dawnInput)?.[0];
+    expect(sum).toBeDefined();
+    // The same summing node feeds the destination (mute, volume, pulse tap).
+    expect(connections.get(sum)).toEqual([harness.destination]);
+    const dawnRecord = recordFor(harness, mixer.dawnInput.gain);
+    harness.setCurrentTime(2);
+    mixer.setChapterIntent({
+      sectionId: 'contact',
+      mood: 'resolve',
+      atStart: false,
+      entryPhrase: 6,
+      generation: 1,
+    });
+    expect(dawnRecord.events).toEqual([]);
+    mixer.dispose();
+    expect((mixer.dawnInput as GainNode & { disconnectCount: number }).disconnectCount).toBe(1);
+  });
+
   it('ramps only the four approved mood controls over 1.4 seconds', () => {
     const harness = createFakeAudioHarness();
     const mixer = createAdaptiveMixer(harness.context, harness.destination);
@@ -129,7 +161,8 @@ describe('adaptive mixer', () => {
     mixer.dispose();
     mixer.dispose();
 
-    expect(harness.gainNodes).toHaveLength(8);
+    // Nine with the END OF SHIFT dawn input.
+    expect(harness.gainNodes).toHaveLength(9);
     for (const node of harness.gainNodes) {
       expect((node as GainNode & { disconnectCount: number }).disconnectCount).toBe(1);
     }