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

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

fixtures/m09-input.json

@@ -143,16 +143,16 @@
       "expected": null
     },
     {
-      "name": "space-is-ignored (until m10)",
+      "name": "constructor-is-not-a-key",
       "args": [
-        " "
+        "constructor"
       ],
       "expected": null
     },
     {
-      "name": "r-is-ignored (until m10)",
+      "name": "toString-is-not-a-key",
       "args": [
-        "r"
+        "toString"
       ],
       "expected": null
     }

fixtures/m10-input.json

@@ -0,0 +1,66 @@
+{
+  "function": "keyToAction",
+  "cases": [
+    {
+      "name": "space-toggles-pause",
+      "args": [
+        " "
+      ],
+      "expected": {
+        "tag": "TogglePause"
+      }
+    },
+    {
+      "name": "r-restarts",
+      "args": [
+        "r"
+      ],
+      "expected": {
+        "tag": "Restart"
+      }
+    },
+    {
+      "name": "R-restarts",
+      "args": [
+        "R"
+      ],
+      "expected": {
+        "tag": "Restart"
+      }
+    },
+    {
+      "name": "ArrowUp-still-turns-up",
+      "args": [
+        "ArrowUp"
+      ],
+      "expected": {
+        "tag": "Turn",
+        "dir": "Up"
+      }
+    },
+    {
+      "name": "d-still-turns-right",
+      "args": [
+        "d"
+      ],
+      "expected": {
+        "tag": "Turn",
+        "dir": "Right"
+      }
+    },
+    {
+      "name": "Enter-is-not-bound",
+      "args": [
+        "Enter"
+      ],
+      "expected": null
+    },
+    {
+      "name": "empty-string-is-not-bound",
+      "args": [
+        ""
+      ],
+      "expected": null
+    }
+  ]
+}

fixtures/m10-moves-every.json

@@ -0,0 +1,47 @@
+{
+  "function": "movesEvery",
+  "cases": [
+    {
+      "name": "score-0",
+      "args": [
+        0
+      ],
+      "expected": 8
+    },
+    {
+      "name": "score-2",
+      "args": [
+        2
+      ],
+      "expected": 8
+    },
+    {
+      "name": "score-3",
+      "args": [
+        3
+      ],
+      "expected": 7
+    },
+    {
+      "name": "score-17",
+      "args": [
+        17
+      ],
+      "expected": 3
+    },
+    {
+      "name": "score-18",
+      "args": [
+        18
+      ],
+      "expected": 2
+    },
+    {
+      "name": "score-100",
+      "args": [
+        100
+      ],
+      "expected": 2
+    }
+  ]
+}