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/JsonTools/DiffNavigator.tsx

@@ -30,7 +30,7 @@ export default function DiffNavigator({
     return (
       <div
         className={cn(
-          'flex items-center justify-center gap-3 px-4 py-2 rounded-lg border border-border bg-muted/30 select-none animate-in fade-in duration-200',
+          'flex items-center justify-center gap-3 px-4 py-2 rounded-lg border border-border bg-muted/30 select-none',
           className,
         )}
         {...props}
@@ -60,9 +60,9 @@ export default function DiffNavigator({
         aria-label={t('jsonDiff:previousDiff')}
         onClick={onPrev}
         className={cn(
-          'p-1 rounded-md text-muted-foreground transition-all hover:bg-accent hover:text-foreground',
+          'p-1 rounded-md text-muted-foreground hover:bg-accent hover:text-foreground',
           'focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring',
-          'disabled:pointer-events-none disabled:opacity-30 active:scale-95', // 4. 边界拦截：触顶时优雅淡化并锁死点击
+          'disabled:pointer-events-none disabled:opacity-30', // 4. 边界拦截：触顶时优雅淡化并锁死点击
         )}
       >
         <ChevronLeft className="h-4 w-4" />
@@ -81,9 +81,9 @@ export default function DiffNavigator({
         aria-label={t('jsonDiff:nextDiff')}
         onClick={onNext}
         className={cn(
-          'p-1 rounded-md text-muted-foreground transition-all hover:bg-accent hover:text-foreground',
+          'p-1 rounded-md text-muted-foreground hover:bg-accent hover:text-foreground',
           'focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring',
-          'disabled:pointer-events-none disabled:opacity-30 active:scale-95', // 4. 边界拦截：触底时优雅淡化并锁死点击
+          'disabled:pointer-events-none disabled:opacity-30', // 4. 边界拦截：触底时优雅淡化并锁死点击
         )}
       >
         <ChevronRight className="h-4 w-4" />

pages/JsonTools/DiffResult.tsx

@@ -197,7 +197,7 @@ const UnifiedRow = ({ depth, type, text, active, multiline }: UnifiedRowProps) =
   return (
     <div
       className={cn(
-        'flex items-start w-full font-mono py-0.5 select-text group transition-colors',
+        'flex items-start w-full font-mono py-0.5 select-text group',
         currentTheme.bg,
         currentTheme.text,
         // 4. 高亮定位条：不再使用生硬的蓝圆环，改为现代编辑器的“侧边左高亮带”设计，质感直接拉满

pages/JsonTools/JsonConvertSection.tsx

@@ -74,10 +74,7 @@ export default function JsonConvertSection({
       : null;
 
   return (
-    <div
-      className={cn('w-full flex flex-col gap-4 animate-in fade-in duration-300', className)}
-      {...props}
-    >
+    <div className={cn('w-full flex flex-col gap-4', className)} {...props}>
       {/* 输入区 */}
       <TextInputArea
         placeholder={t(`jsonFormat:${pk}InputPlaceholder`)}
@@ -93,7 +90,7 @@ export default function JsonConvertSection({
 
       {/* 4. 结果展示或状态引导卡片区 */}
       {result && result.output ? (
-        <div className="relative rounded-xl border border-border bg-card text-card-foreground shadow-sm overflow-hidden animate-in slide-in-from-bottom-2 duration-300">
+        <div className="relative rounded-xl border border-border bg-card text-card-foreground shadow-sm overflow-hidden">
           {/* 结果栏精致头部 */}
           <div className="flex h-9 items-center justify-between px-4 border-b border-border bg-muted/50 select-none">
             <div className="flex gap-4 items-center">

pages/JsonTools/JsonFormatSection.tsx

@@ -62,7 +62,7 @@ export default function JsonFormatSection() {
       : null;
 
   return (
-    <div className="w-full flex flex-col gap-4 animate-in fade-in duration-300">
+    <div className="w-full flex flex-col gap-4">
       {/* 工具控制栏 */}
       <div className="flex h-10 items-center justify-between px-1.5 bg-secondary/40 rounded-xl border border-border/60">
         <div className="flex gap-4 items-center w-full">
@@ -95,7 +95,7 @@ export default function JsonFormatSection() {
             />
             <Label
               htmlFor="sort-keys-checkbox"
-              className="text-xs font-bold text-foreground/80 cursor-pointer tracking-tight group-hover:text-foreground transition-colors"
+              className="text-xs font-bold text-foreground/80 cursor-pointer tracking-tight group-hover:text-foreground"
             >
               {t('jsonFormat:sortKeys')}
             </Label>
@@ -118,7 +118,7 @@ export default function JsonFormatSection() {
 
       {/* 格式化结果流面板展示 */}
       {result && result.formatted ? (
-        <div className="relative rounded-xl border border-border bg-card text-card-foreground shadow-sm overflow-hidden animate-in slide-in-from-bottom-2 duration-300">
+        <div className="relative rounded-xl border border-border bg-card text-card-foreground shadow-sm overflow-hidden">
           {/* 结果栏头部 */}
           <div className="flex h-9 items-center justify-between px-4 border-b border-border bg-muted/50 select-none">
             <div className="flex gap-4 items-center">

pages/JsonTools/JsonTree.tsx

@@ -135,7 +135,7 @@ const NodeRow = React.memo(
           <div
             onClick={() => setOverride(expanded ? 'closed' : 'open')}
             className={cn(
-              'group flex items-center gap-1 py-0.5 pr-2 text-xs font-mono select-none cursor-pointer rounded-sm transition-colors w-full h-[22px] leading-relaxed',
+              'group flex items-center gap-1 py-0.5 pr-2 text-xs font-mono select-none cursor-pointer rounded-sm w-full h-[22px] leading-relaxed',
               theme.bg,
               isActive &&
                 'bg-primary/10 relative before:absolute before:left-0 before:top-0 before:bottom-0 before:w-0.5 before:bg-blue-500 rounded-none ring-0',
@@ -207,7 +207,7 @@ const NodeRow = React.memo(
       <div
         ref={rowRef}
         className={cn(
-          'flex items-center gap-1 py-0.5 pr-2 font-mono text-xs w-full h-[22px] leading-relaxed rounded-sm transition-colors',
+          'flex items-center gap-1 py-0.5 pr-2 font-mono text-xs w-full h-[22px] leading-relaxed rounded-sm',
           theme.bg,
           isActive &&
             'bg-primary/10 relative before:absolute before:left-0 before:top-0 before:bottom-0 before:w-0.5 before:bg-blue-500 rounded-none ring-0',

pages/JsonTools/index.tsx

@@ -113,7 +113,7 @@ export default function Index() {
   }, []);
 
   return (
-    <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">
       <SwitchButtonGroup
         value={pageMode}
         onChange={(v: PageMode) => setPageMode(v)}
@@ -129,7 +129,7 @@ export default function Index() {
       />
 
       {pageMode === 'diff' ? (
-        <div className="flex flex-col space-y-4 animate-in fade-in duration-200">
+        <div className="flex flex-col space-y-4">
           <div className="flex h-10 items-center justify-between px-1.5 bg-secondary/40 rounded-xl border border-border/60">
             <SwitchButtonGroup
               value={viewMode}