feat: initialize sunrise with 100-player shared rooms

tests/renderInvalidation.test.ts

@@ -0,0 +1,29 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { PerspectiveCamera } from 'three';
+import { createRenderInvalidation } from '../src/scene/renderInvalidation.ts';
+
+test('unchanged frames skip rendering but each live update requests a fresh frame', () => {
+  const render = createRenderInvalidation();
+  const camera = new PerspectiveCamera();
+  assert.equal(render.shouldRender(camera), true);
+  assert.equal(render.shouldRender(camera), false);
+  for (let tick = 0; tick < 3; tick++) {
+    render.invalidate();
+    assert.equal(render.shouldRender(camera), true);
+    assert.equal(render.shouldRender(camera), false);
+  }
+});
+
+test('movement, rotation, camera switches and ocean animation remain visible', () => {
+  const render = createRenderInvalidation();
+  const camera = new PerspectiveCamera();
+  render.shouldRender(camera);
+  camera.position.x = 1;
+  assert.equal(render.shouldRender(camera), true);
+  camera.rotation.y = 0.2;
+  assert.equal(render.shouldRender(camera), true);
+  assert.equal(render.shouldRender(camera.clone()), true);
+  assert.equal(render.shouldRender(camera, true), true);
+  assert.equal(render.shouldRender(camera, true), true);
+});