Body step 2.1: climbing, mantling, crawling, legs, playground, 144 Hz

- Step rule + lower-body collider: no walking onto tables, steps <= 0.35 m
- Structural hand strength: two-hand mantle/pull-up works, one hand can't
- Arms aim from the physical shoulder horizontally, keep True Body pose vertically
- Crawl pose, crawl carry, 35 deg slope limit, ground feed-forward ignores
  play-space corrections (fixes a runaway feedback loop)
- Grab static world (climbing), procedural visual legs
- Playground sandbox; menu strength slider, spectator (old drag) and turn toggles
- Physics 144 Hz with interpolation; legacy chase-body spikes pin 90 Hz
- RagdollSpike: 27 phases incl. mantle, pull-up, crawl, ledge drop, ramps

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

scripts/MenuSpike.cs

@@ -302,6 +302,20 @@ public partial class MenuSpike : Node3D
         await TouchPress(1, Center(_menu.RecalibrateButton));
         Check("touch: Recalibrate called once", stub.Calls == 1, $"(calls={stub.Calls})");
 
+        // 7b) Player-page toggles: spectator and smooth turn fire with the new state.
+        bool? spectator = null, smooth = null;
+        _menu.SpectatorToggled += on => spectator = on;
+        _menu.SmoothTurnToggled += on => smooth = on;
+        await TouchPress(1, TabCenter(0));
+        await TouchPress(1, Center(_menu.SpectatorButton));
+        await TouchPress(1, Center(_menu.TurnModeButton));
+        await Frame(3);
+        Check("touch: spectator toggled on", spectator == true, $"({spectator})");
+        Check("touch: smooth turn toggled on", smooth == true, $"({smooth})");
+        await TouchPress(1, Center(_menu.SpectatorButton));
+        await Frame(3);
+        Check("touch: spectator toggled back off", spectator == false, $"({spectator})");
+
         // 8) Header Close via touch.
         await TouchPress(1, Center(_menu.HeaderCloseButton));
         Check("touch: Close fired once", _close == 1, $"(count={_close})");