Update Controls docs: precise naming + front-facing/persistent camera

README.md

@@ -22,12 +22,20 @@ move any slider and the 3D head mesh regenerates live.
 
 ## Controls
 
-- **Identity** — first 10 components of the linear identity basis (head shape).
-- **Expression** — selected blendshape components per region (left/right eye,
-  lower face, tongue, pupil).
-- **Pose** — joint rotations for neck and head (degrees), plus a gaze direction
-  control with vergence.
-- **Translation** — global position.
+Control labels are named to match exactly what each one changes in the model:
+
+- **Identity** — first 10 components of the linear identity basis, i.e. overall
+  **head shape**.
+- **Expression** — selected blendshape components per region: **left eye
+  region**, **right eye region**, **lower face region** (jaw / chin / lips /
+  mouth), **tongue**, and **pupil dilation**.
+- **Pose** — neck and head **rotations** (pitch / yaw / roll, in degrees), plus
+  **gaze** (eyeball pitch / yaw with a cross-eye vergence control).
+- **Translation** — global position of the whole head (X left/right,
+  Y up/down, Z forward/back).
+
+The 3D view opens **front-facing** and keeps your current camera position and
+orientation as you move the sliders (no reset or flicker on update).
 
 The model is pure NumPy (a few matrix multiplies, ~40 ms per evaluation), so the
 Space runs on `cpu-basic` with no GPU required.