feat: initialize sunrise with 100-player shared rooms

tests/render-performance.test.ts

@@ -0,0 +1,18 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { frameSummary } from '../src/scene/frameSummary.ts';
+
+test('frame summary uses nearest-rank p95 and retains long foreground stalls', () => {
+  const values = [...Array(94).fill(16), ...Array(5).fill(40), 500];
+  const result = frameSummary(values);
+  assert.equal(result.p95Ms, 40);
+  assert.equal(result.meanMs, 22.04);
+  assert.equal(result.over50Ms, 1);
+  assert.equal(result.overBudget, 6);
+  assert.ok(Math.abs(result.fps! - 1000 / 22.04) < 1e-10);
+});
+
+test('empty render sample cannot be reported as passing FPS', () => {
+  assert.equal(frameSummary([]).fps, null);
+  assert.equal(frameSummary([]).p95Ms, null);
+});