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_93.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={
-b4A(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zt(v,u)
+b4E(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zw(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnJ(u)
+v.r=A.bnN(u)
 return u},
-bmp(d,e){var y
+bmt(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0427\u0430\u0441\u044b"
 break A}if("timePicker.minutes"===e){y="\u041c\u0438\u043d\u0443\u0442\u044b"
 break A}if("timePicker.seconds"===e){y="\u0421\u0435\u043a\u0443\u043d\u0434\u044b"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0412\u044b\u0431\u0440\u0430\u0442\u044c
 break A}if("keyboardToolbar.done"===e){y="\u0413\u043e\u0442\u043e\u0432\u043e"
 break A}y=null
 break A}return y},
-bnJ(d){return new A.aSB(d)},
-Zt:function Zt(d,e){var _=this
+bnN(d){return new A.aSF(d)},
+Zw:function Zw(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOQ:function aOQ(){},
-aSB:function aSB(d){this.a=d},
-aau:function aau(){}}
+aOS:function aOS(){},
+aSF:function aSF(d){this.a=d},
+aaw:function aaw(){}}
 B=c[0]
 A=a.updateHolder(c[64],A)
-A.Zt.prototype={
+A.Zw.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOQ()}return x},
+x=y.z=new A.aOS()}return x},
 gb9(){return this.r}}
-A.aOQ.prototype={
+A.aOS.prototype={
 gbh(){return"\u0412\u044b\u0440\u0435\u0437\u0430\u0442\u044c"},
 gbg(){return"\u041a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u0442\u044c"},
 gbi(){return"\u0412\u0441\u0442\u0430\u0432\u0438\u0442\u044c"},
 gbe(){return"\u0412\u044b\u0431\u0440\u0430\u0442\u044c \u0432\u0441\u0451"}}
-A.aau.prototype={}
+A.aaw.prototype={}
 var z=a.updateTypes([])
-A.aSB.prototype={
-$1(d){return A.bmp(this.a,d)},
+A.aSF.prototype={
+$1(d){return A.bmt(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aau,B.a_)
-x(A.Zt,A.aau)
-x(A.aOQ,B.aZ)
-x(A.aSB,B.aR)
-y(A.aau,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Zt":{"a_":[]}}'))};
-(a=>{a["I5fvGdUPa8pjvs43j5SiWdZ60A0="]=a.current})($__dart_deferred_initializers__);
+x(A.aaw,B.a_)
+x(A.Zw,A.aaw)
+x(A.aOS,B.aZ)
+x(A.aSF,B.aR)
+y(A.aaw,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zw":{"a_":[]}}'))};
+(a=>{a["HNanL8pjLKlF3EyLT8kn+b4luNI="]=a.current})($__dart_deferred_initializers__);