优化缩略图

release/UNIVERSAL_SpineViewer/_locales/en.json

@@ -40,6 +40,7 @@
         "animatedPickHint": "Every result keeps a 400×400 canvas; the label shows detail resolution@fps/quality/file size. Select one and press Confirm to replace the thumbnail, or cancel to discard them all.",
         "animatedPickConfirm": "Confirm",
         "animatedPriority": "Priority",
+        "animatedCanvas": "Canvas size",
         "priorityResolution": "Resolution first",
         "priorityFramerate": "Frame rate first",
         "priorityBalanced": "Alternate resolution and frame rate",