Judge tilts by camera pitch and follow a newer flight at once

- A tilt's angle, limits and "unchanged" check use the camera's own
  pitch. At regional range the pivot pitch is up to about 8 degrees
  shallower, so "tilt to 5 degrees" from 900 km ended at -12.9 degrees.
  The swing now solves for the pivot pitch that gives the camera angle.
- A zoom out during a pivoting tilt stops at the 1,000 km pivot limit
  instead of the orbit's 5,000 km, and a zoom in that reaches the
  clearance is applied before the pivot ends.
- An angle the camera already holds still takes navigation, so it stops
  a running motion and releases the follow camera.
- A motion queued behind a fly-to moves to a newer fly-to as soon as it
  begins, so a stalled lookup no longer holds it past a flight that
  landed. Wait listeners are removed when a wait ends, and a lookup that
  found nothing points straight at the flight that moved.
- A fly-to that stops a running motion names it (stoppedMotion).
- A tilt left or right is refused, and the pitchDeg description says
  steps use direction.

server/providers/openai/toolDescriptions.js

@@ -533,7 +533,7 @@ export const ACTION_DESCRIPTIONS = {
         },
         pitchDeg: {
           description:
-            'Absolute pitch, not a step: -45 oblique (default), -89 top-down.',
+            'Absolute; steps use direction. -45 oblique (default), -89 top-down.',
           $position: 1,
         },
       },