Felt Orbit v30 - silhouette manta test
Based on working v29/v28 ORAC page routing.

Visual:
- outline shape redesigned from the supplied manta silhouette:
  curved swept wings, narrow rear body, long tail.
- periodic metro redraw removed.
- the visual now renders once immediately when entering the Manta page.
  This is a test specifically aimed at the ~1 second flash caused by
  competing ORHACK/UI redraws.

Audio/control DSP is unchanged.
