fix: handle MIST movie timer actions and verify skipping

frontend/src/player/screens.ts

@@ -2046,7 +2046,12 @@ export class ScreenManager {
       Image: shape("image"),
       AlphaMask: shape("alphamask"),
     };
-    out.If = (condition: any, yes: any = null, no: any = null) => (truthy(condition) ? yes : no);
+    out.If = (...a: any[]) => {
+      const kw = kwOf(a), args = a.filter((value) => !value?.__kw);
+      const condition = args.length ? args[0] : kw.expression;
+      return truthy(condition) ? (args.length > 1 ? args[1] : kw.true ?? null)
+        : (args.length > 2 ? args[2] : kw.false ?? null);
+    };
     out.GetTooltip = () => this.tooltip;
     out.StaticValue = (value: number, range = 1) => new BarValue(() => value, () => range);
     out.AnimatedValue = out.StaticValue;