fix: 修复划转页面卡片互换动画效果

- 重写 AnimatedSwitcher 实现，移除多余的 Container 包裹
- 直接在 _buildAccountCard 上设置 ValueKey
- 使用 SlideTransition + FadeTransition 组合
- 上方卡片从上滑入，下方卡片从下滑入
- 动画时长 300ms，easeInOut 曲线
- 动画效果更流畅自然，卡片互换位置清晰可见

flutter_monisuo/build/web/main.dart.js_91.part.js

@@ -1,15 +1,15 @@
 ((a,b)=>{a[b]=a[b]||{}})(self,"$__dart_deferred_initializers__")
 $__dart_deferred_initializers__.current=function(a,b,c,$){var B,A={
-b4y(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zr(v,u)
+b4C(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zu(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnM(u)
+v.r=A.bnQ(u)
 return u},
-bms(d,e){var y
+bmw(d,e){var y
 A:{if("timePicker.hours"===e){y="Horas"
 break A}if("timePicker.minutes"===e){y="Minutos"
 break A}if("timePicker.seconds"===e){y="Segundos"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Selecionar tudo"
 break A}if("keyboardToolbar.done"===e){y="Conclu\xeddo"
 break A}y=null
 break A}return y},
-bnM(d){return new A.aSE(d)},
-Zr:function Zr(d,e){var _=this
+bnQ(d){return new A.aSI(d)},
+Zu:function Zu(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOO:function aOO(){},
-aSE:function aSE(d){this.a=d},
-aas:function aas(){}}
+aOQ:function aOQ(){},
+aSI:function aSI(d){this.a=d},
+aau:function aau(){}}
 B=c[0]
 A=a.updateHolder(c[62],A)
-A.Zr.prototype={
+A.Zu.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOO()}return x},
+x=y.z=new A.aOQ()}return x},
 gb9(){return this.r}}
-A.aOO.prototype={
+A.aOQ.prototype={
 gbh(){return"Cortar"},
 gbg(){return"Copiar"},
 gbi(){return"Colar"},
 gbe(){return"Selecionar tudo"}}
-A.aas.prototype={}
+A.aau.prototype={}
 var z=a.updateTypes([])
-A.aSE.prototype={
-$1(d){return A.bms(this.a,d)},
+A.aSI.prototype={
+$1(d){return A.bmw(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aas,B.a_)
-x(A.Zr,A.aas)
-x(A.aOO,B.aZ)
-x(A.aSE,B.aR)
-y(A.aas,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Zr":{"a_":[]}}'))};
-(a=>{a["onT5rEn3m1h8VM5j3r2cDjQXS/w="]=a.current})($__dart_deferred_initializers__);
+x(A.aau,B.a_)
+x(A.Zu,A.aau)
+x(A.aOQ,B.aZ)
+x(A.aSI,B.aR)
+y(A.aau,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zu":{"a_":[]}}'))};
+(a=>{a["oTuTO6qGRhMohhhxMc1ralTNQEw="]=a.current})($__dart_deferred_initializers__);