- snap/mod.rs: Snapper gains otrack_enabled, tracking_points, dwell state;
update_otrack_dwell() acquires a snap point after DWELL_THRESHOLD=4
consecutive moves near the same position; otrack_snap() returns an
H/V alignment snap position; clear_tracking() resets state on command end
- overlay.rs: selection_overlay accepts ost_points + cursor_screen;
draws light-blue dashed H/V lines from acquired points + small cross marker
- statusbar.rs: OTRACK pill (F11) added next to DYN
- view.rs: projects tracking_points to screen, passes to selection_overlay
- update.rs: calls update_otrack_dwell + otrack_snap in ViewportMove;
overrides effective point with OST alignment when no normal snap is active
- ROADMAP.md: Object Snap Tracking marked ✅
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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