Default new zoom cues to Pointer instead of Smart

Auto Zoom and manually added timeline zooms both overrode the model's
Pointer default. Smart stays available as an explicit inspector choice and
saved cues keep whatever mode they were stored with.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015JKumBzipQQn9vrJ4XDiiB