feat(js): m10 extensions (pause, restart, speed-up via Frame) with tests

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

js/solutions/app.js

@@ -7,12 +7,18 @@ import { keyDowns, interval, map, filterMap, merge, scan, startWith } from './st
 import { keyToAction } from './input.js'
 
 export const TICK_MS = 150
+export const FRAME_MS = 25
 
 // Everything that can happen to the game: a Tick every TICK_MS, and a Turn for each steering key.
 export const classicActions = merge(
   map(interval(TICK_MS), () => Action.Tick),
   filterMap(keyDowns, keyToAction))
 
+// m10: a Frame every FRAME_MS instead of a Tick; the game itself decides (movesEvery) which frames take a step.
+export const speedActions = merge(
+  map(interval(FRAME_MS), () => Action.Frame),
+  filterMap(keyDowns, keyToAction))
+
 // Actions folded into game states. startWith puts the initial state first so it is drawn right away.
 export const states = (seed, actions) =>
   startWith(scan(actions, update, newGame(seed)), newGame(seed))
@@ -21,4 +27,4 @@ export const render = (state) => drawScene(view(state))
 
 // The whole program as a value: get a seed, then turn the stream of states into a stream of drawings.
 // Nothing runs here; runtime.js interprets it.
-export const main = mapIO(randomSeed, (seed) => map(states(seed, classicActions), render))
+export const main = mapIO(randomSeed, (seed) => map(states(seed, speedActions), render))