Drive the visual styles, bloom and sharpen through the effects port

VisualEffects defines each preset on the renderer and keeps its own
records of intensities and parameters, written through to the port, so
crossfades, the anime sky fade, bloom and sharpen behave as before. The
renderer animates the animated styles. Sensor picks read the style
records instead of the renderer's stages. The application renderer now
has the effects port and its capabilities.

docs/CURRENT-STATE.md

@@ -1473,11 +1473,14 @@ remain unchanged.
 
 ## Visual effects ownership
 
-VisualEffects owns style-stage creation, crossfades, animation scheduling, bloom
-and sharpen. Display supplies actions and renders settings; effect execution has
-no DOM dependency. Existing presets and the 500 ms transition remain unchanged.
-Stopping the controller revokes animation before asynchronous UI teardown; final
-destruction removes its stages and restores the borrowed bloom configuration.
+VisualEffects keeps the records of the styles, their crossfades, bloom and
+sharpen, and drives them through the renderer's effects port: it defines each
+preset there as a style, and the renderer runs the passes and animates the
+animated ones. Display supplies actions and renders settings; effect execution
+has no DOM dependency. Existing presets and the 500 ms transition remain
+unchanged. Stopping the controller revokes animation before asynchronous UI
+teardown; final destruction removes its styles and turns bloom and sharpen off,
+and the renderer restores the scene's bloom configuration when it goes.
 Snow is no longer a visual preset. A share link that names it, in either the
 long or compact form, opens on Normal and drops the Snow shader parameters. A
 view passed to embed mode or `show_in_gods_eye_view`, and a saved scene shot,