Shot Viewer: sequence field, cameras named CAM_sq0000_sh0000

The Shot Viewer panel gets a Sequence number, saved with the scene. New
shot cameras are named from it with SHOT_CAMERA_NAME_FORMAT
("{prefix}{sequence}_{shot}") and SEQUENCE_NAME_FORMAT ("sq{:04d}"),
both overridable in the config JSON.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ui/panel.py

@@ -283,6 +283,10 @@ class _ShotViewerPanel:
         scene = context.scene
         has_shots = bool(shot_viewer.shots(scene))
 
+        row = layout.row(align=True)
+        row.prop(scene, "wtd_sequence")
+        row.label(text=shot_viewer.sequence_name(scene))
+
         row = layout.row(align=True)
         row.scale_y = 1.4
         row.enabled = has_shots