Update: Style improvements, Italian localization fix and small improvements

- Added 'disabled' class to the input element when tightBorder is false.
- Applied unavailable cursor style and disabled gray background for elements with the 'disabled' class.
- Fixed Italian localization: Changed 'Lingue' to 'Language' to maintain universal terminology and improve user experience.
- Added improvement to resizing the border so that it was at 90% of the screen size
- Added new color for disabled options
- Added title for explain the usage of tightBorder and adjustedContainer
- Added the feature to remove a chat item using the middle click (middle mouse button)
- Properly utilized the MouseEvent event in the ChatItem component

app/locales/cn.ts

@@ -83,6 +83,10 @@ const cn = {
     SendKey: "发送键",
     Theme: "主题",
     TightBorder: "紧凑边框",
+    TightBorderExplanation: "此选项将窗口边框调整为适应屏幕尺寸的100%",
+    AdjustedContainer: "调整容器",
+    AdjustedContainerExplanation:
+      "此选项将窗口调整为占据屏幕尺寸的90%，在其周围留下一定边距",
     SendPreviewBubble: "发送预览气泡",
     Prompt: {
       Disable: {