fix(backgrounds): legacy config compatibility and locale sync

src/locales/zh.json

@@ -1050,6 +1050,12 @@
       "particleColor": "粒子颜色",
       "starColor": "星星颜色",
       "trailColor": "尾迹颜色",
+      "bgStarColor": "背景星星颜色",
+      "pointerColor": "指针颜色",
+      "beamColor": "光束颜色",
+      "explosionColor": "爆炸颜色",
+      "multicolor": "多彩模式",
+      "lineColor": "线条颜色",
       "bgColor": "背景颜色",
       "fillColor": "填充颜色",
       "color1": "颜色1",