fix(runtime): align portal and movement presentation

Port retail portal viewport projection and reveal behavior, preserve outbound combat style, drive remote and local grounded movement from authored CSequence root frames, and reuse the local prepared pose so animation hooks advance once.

User-verified portal, observer movement, combat stance, and short-tap locomotion gates. Release build passed with 5,767 tests and five intentional skips.

Co-authored-by: OpenAI Codex <codex@openai.com>

src/AcDream.App/Rendering/Sky/SkyRenderer.cs

@@ -162,13 +162,13 @@ public sealed unsafe class SkyRenderer : IDisposable
     {
         if (group is null || group.SkyObjects.Count == 0) return;
 
-        // Build a sky projection with a huge far plane so 1e6m-distant
-        // celestial meshes don't clip. The FOV is cargo-culted from the
-        // camera's projection — see WorldBuilder's implementation.
-        float fovY = MathF.PI / 3f;  // 60° — matches FlyCamera/ChaseCamera
-        float aspect = camera.Aspect;
-        if (aspect <= 0f) aspect = 16f / 9f;
-        var skyProj = Matrix4x4.CreatePerspectiveFieldOfView(fovY, aspect, Near, Far);
+        // Keep sky meshes inside their authored depth range without
+        // replacing the active viewport's horizontal/vertical projection.
+        // Retail installs SmartBox's active projection before LScape::draw
+        // (SmartBox::RenderNormalMode @ 0x00453AA0), then GameSky::Draw
+        // (@ 0x00506FF0) changes ONLY zfar to 4x for the sky draw. Preserve
+        // that FOV here, including the near-180-degree teleport transition.
+        var skyProj = SkyProjection.WithDepthRange(camera.Projection, Near, Far);
 
         // View with translation zeroed — keeps the sky at camera origin
         // regardless of camera position in the world.