feat(ui): add dedicated cancel button for batch rendering

operators.py

@@ -12,6 +12,16 @@ def on_render_cancel(scene, depsgraph=None):
     SCENERENDERER_OT_render_all._is_rendering = False
     SCENERENDERER_OT_render_all._cancel_requested = True
 
+class SCENERENDERER_OT_cancel_batch(bpy.types.Operator):
+    bl_idname = "scenerenderer.cancel_batch"
+    bl_label = "Cancel Batch Render"
+    bl_description = "Abort the current batch rendering process"
+
+    def execute(self, context):
+        SCENERENDERER_OT_render_all._cancel_requested = True
+        self.report({'INFO'}, "Batch render cancellation requested. Will stop after current frame or on ESC.")
+        return {'FINISHED'}
+
 
 class SCENERENDERER_OT_render_all(bpy.types.Operator):
     bl_idname = "scenerenderer.render_all"