polish: scene nits — live-lens yard, square stacks, deck-clear billboard, two-layer lamps, flare reach, phone traffic and exposure

tests/unit/billboard.test.ts

@@ -2,6 +2,7 @@ import { afterEach, describe, expect, it } from 'vitest';
 import { SceneResourceBag } from '@/scene/resources';
 import { publishBillboard, billboardStops, type BillboardProject } from '@/journey/billboard-progress';
 import {
+  BILLBOARD_DECK_CLEAR_Z,
   BILLBOARD_TIMING,
   BILLBOARD_Z_FROM,
   BILLBOARD_Z_TO,
@@ -9,6 +10,7 @@ import {
   billboardZ,
   composeScreen,
   createBillboard,
+  deckAhead,
   SCREEN_ASPECT,
   STANDING,
   textureSize,
@@ -156,6 +158,23 @@ describe('billboard world', () => {
     expect(board.mesh.visible).toBe(false);
   });
 
+  it('holds down until the EXIT 05 deck has passed the camera, then rises', () => {
+    const board = createBillboard(new SceneResourceBag(), { mode: 'full', textureSize: 512, io: fakeIO().io });
+    // The deck comes down the road from the haze toward the camera (z ~25).
+    for (let z = -400; z < BILLBOARD_DECK_CLEAR_Z; z += 4) {
+      board.update(frame('infrastructure', null, { deckZ: z, deckExit: 'selected-builds' }));
+      expect(board.inspect().rise).toBe(0);
+    }
+    // Another chapter's deck, or no deck, never holds it.
+    expect(deckAhead({ deckZ: -80, deckExit: 'additional-work' })).toBe(false);
+    expect(deckAhead({ deckZ: null, deckExit: 'selected-builds' })).toBe(false);
+    const up = run(board, 10, frame('infrastructure', null, { deckZ: BILLBOARD_DECK_CLEAR_Z + 2, deckExit: 'selected-builds' }));
+    expect(up.at(-1)!.rise).toBe(1);
+    // Standing (reverse drive back under the deck): it stays up.
+    const back = run(board, 3, frame('infrastructure', null, { deckZ: -60, deckExit: 'selected-builds', direction: -1 }));
+    expect(back.at(-1)!.rise).toBe(1);
+  });
+
   it('keeps the floods off while rising, then lights each project in order and reverses', async () => {
     publishBillboard(PROJECTS, STOPS);
     const board = createBillboard(new SceneResourceBag(), { mode: 'full', textureSize: 512, io: fakeIO().io });