fix: remove all unnecessary animations from all pages

- Remove dead code animations (animate-in, fade-in, slide-in, zoom-in, shake) from tailwindcss-animate plugin (not installed)
- Remove decorative transition effects (transition-all, transition-colors) from all page components
- Remove scale effects (active:scale-95) from buttons
- Remove bounce animations (animate-bounce) from icons
- Keep functional animate-spin on loading spinners as they provide essential loading feedback

Affected pages: Dashboard, Timestamp, Jwt, JsonTools, Base64Converter, HtmlToMarkdown, MarkdownToHtml, QrCode, TextStatistics

pages/QrCode/components/GeneratePanel.tsx

@@ -10,11 +10,11 @@ export default function GeneratePanel() {
   const { generatorState, setTextToEncode, downloadQrCode, copyQrCode } = useQrCodeContext();
 
   return (
-    <div className="grid grid-cols-1 md:grid-cols-2 gap-6 w-full items-stretch select-none p-0.5 animate-in fade-in duration-300">
+    <div className="grid grid-cols-1 md:grid-cols-2 gap-6 w-full items-stretch select-none p-0.5">
       {/* 左翼：高性能受控输入翼终端 */}
       <div
         className={cn(
-          'border border-border rounded-xl bg-card text-card-foreground shadow-sm flex flex-col p-4 transition-all duration-200',
+          'border border-border rounded-xl bg-card text-card-foreground shadow-sm flex flex-col p-4',
           'focus-within:ring-1 focus-within:ring-ring focus-within:border-ring',
         )}
       >

pages/QrCode/components/ParsePanel.tsx

@@ -61,7 +61,7 @@ export default function ParsePanel() {
     /* 💡 统一大视觉轴：
        - 追加 p-0.5 微隔离，配合 gap-6 建立与生成面板（GeneratePanel）绝对像素对齐的网格天平。
     */
-    <div className="grid grid-cols-1 md:grid-cols-2 gap-6 w-full items-stretch select-none p-0.5 animate-in fade-in duration-300">
+    <div className="grid grid-cols-1 md:grid-cols-2 gap-6 w-full items-stretch select-none p-0.5">
       {/* 左翼：图片接收/拖拽/剪贴板上传终端 */}
       <div className="flex flex-col h-full">
         <ImageUploader
@@ -78,7 +78,7 @@ export default function ParsePanel() {
       {/* 右翼：高阶解析出码只读终端 */}
       <div
         className={cn(
-          'border border-border rounded-xl bg-card text-card-foreground shadow-sm flex flex-col p-4 transition-all duration-200',
+          'border border-border rounded-xl bg-card text-card-foreground shadow-sm flex flex-col p-4',
           // 💡 视觉对称增强：加入相同的聚焦变量环联动，使双翼权重达成完美绝对平衡
           'focus-within:ring-1 focus-within:ring-ring focus-within:border-ring',
         )}

pages/QrCode/index.tsx

@@ -23,7 +23,7 @@ export default function Index() {
          - 彻底剥离破坏流式宽度的 max-w-[400px] 枷锁，开启标准的 w-full 全自适应包裹。
          - 替换为标准的 p-4 呼吸内边距配合 flex flex-col space-y-4，接管系统级重排！
       */}
-      <div className="p-4 w-full flex flex-col space-y-4 min-h-[500px] select-none animate-in fade-in duration-300">
+      <div className="p-4 w-full flex flex-col space-y-4 min-h-[500px] select-none">
         {/* 流式中央控制切流卡：注入 sm 断点防御，防范单栏状态下发生变形 */}
         <div className="w-full sm:w-fit pt-0.5">
           <SwitchButtonGroup
@@ -40,11 +40,11 @@ export default function Index() {
         */}
         <div className="w-full pt-1.5">
           {qrCode.mode === 'generate' ? (
-            <div className="animate-in fade-in duration-200">
+            <div>
               <GeneratePanel />
             </div>
           ) : (
-            <div className="animate-in fade-in duration-200">
+            <div>
               <ParsePanel />
             </div>
           )}