feat(recording): render the safe frame from a recording store

RecordingControls publishes the safe frame a recording composes in, 16:9
or 9:16 (null while none records), to the new recording store, and the
scene chrome renders the overlay's active and ratio classes from it
instead of the controls writing them. Any frame but 9:16, even none named,
records in 16:9 as before.

CHANGELOG.md

@@ -74,7 +74,9 @@
   `UiEmpty`.
   The top-center clear, share, tilt, north-up and reset buttons, and the
   cockpit's reset, call the shell through the new globe actions store,
-  which also carries the camera's tilt and compass heading. `syncScopeControls` (`./ui/display`),
+  which also carries the camera's tilt and compass heading. The recording
+  safe frame renders what `RecordingControls` publishes to the new
+  recording store. `syncScopeControls` (`./ui/display`),
   `shouldHideCollapsedRightPanels` (`./ui/layout`) and
   `bindClearLayersControl` (`./ui/layers`) are deprecated: the Display view,
   the rail and the globe actions view now own what they did. `./ui/input` imports Vue