feat: 新增磨砂玻璃透明度设置功能

src/i18n/locales/en-US.json

@@ -94,7 +94,12 @@
       "bg6": "Background 6",
       "bg7": "Background 7",
       "bg8": "Background 8",
-      "bg9": "Background 9"
+      "bg9": "Background 9",
+      "glass": "Glass transparency",
+      "glassTip": "Drag the sliders to adjust how transparent the cards and dialogs are. Higher values are more transparent.",
+      "cardTransparency": "Card transparency",
+      "modalTransparency": "Dialog transparency",
+      "previewTip": "Top preview shows cards, bottom shows dialogs — drag a slider to preview live."
     }
   },
   "server": {

src/i18n/locales/zh-CN.json

@@ -94,7 +94,12 @@
       "bg6": "背景六",
       "bg7": "背景七",
       "bg8": "背景八",
-      "bg9": "背景九"
+      "bg9": "背景九",
+      "glass": "磨砂玻璃透明度",
+      "glassTip": "拖动滑块调整卡片与弹窗背景的透明程度，数值越大越透明",
+      "cardTransparency": "卡片透明度",
+      "modalTransparency": "弹窗透明度",
+      "previewTip": "上方为卡片效果，下方为弹窗效果，可拖动滑块实时预览"
     }
   },
   "server": {