chore(js): polish pong keys, held mapping and m09 main test

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

js/test/m09-runtime.test.js

@@ -2,10 +2,9 @@ import test from 'node:test'
 import assert from 'node:assert/strict'
 import { runIO, runApp } from '../src/runtime.js'
 import { pure, draw, randomSeed, map, sequence } from '../src/io.js'
-import { states, classicActions, render } from '../src/app.js'
-import { map as mapStream } from '../src/stream.js'
 import { view } from '../src/view.js'
 import { newGame, tick } from '../src/spawn.js'
+import { classicMain } from './helpers.js'
 
 // A fake platform: records every call and lets the test fire events by hand.
 const fakePlatform = (seed = 42) => {
@@ -25,8 +24,8 @@ const fakePlatform = (seed = 42) => {
   }
 }
 
-// The m09 program: ticks every 150 ms. (The shipped `main` uses speedActions after m10, so these tests build their own.)
-const main = map(randomSeed, (seed) => mapStream(states(seed, classicActions), render))
+// The m09 program (classicMain) ticks every 150 ms; the shipped `main` uses speedActions after m10.
+const main = classicMain
 
 // What the platform should have been asked to draw for a scene.
 const expectedCalls = (scene) =>