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_66.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={
-b4c(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Z5(v,u)
+b4g(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Z8(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bo9(u)
+v.r=A.bod(u)
 return u},
-bmQ(d,e){var y
+bmU(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0421\u0430\u0493\u0430\u0442"
 break A}if("timePicker.minutes"===e){y="\u041c\u0438\u043d\u0443\u0442"
 break A}if("timePicker.seconds"===e){y="\u0421\u0435\u043a\u0443\u043d\u0434"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0411\u0430\u0440\u043b\u044b\u0493\u044b\
 break A}if("keyboardToolbar.done"===e){y="\u0414\u0430\u0439\u044b\u043d"
 break A}y=null
 break A}return y},
-bo9(d){return new A.aT1(d)},
-Z5:function Z5(d,e){var _=this
+bod(d){return new A.aT5(d)},
+Z8:function Z8(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOs:function aOs(){},
-aT1:function aT1(d){this.a=d},
-aa6:function aa6(){}}
+aOu:function aOu(){},
+aT5:function aT5(d){this.a=d},
+aa8:function aa8(){}}
 B=c[0]
 A=a.updateHolder(c[40],A)
-A.Z5.prototype={
+A.Z8.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOs()}return x},
+x=y.z=new A.aOu()}return x},
 gb9(){return this.r}}
-A.aOs.prototype={
+A.aOu.prototype={
 gbh(){return"\u041a\u0435\u0441\u0443"},
 gbg(){return"\u041a\u04e9\u0448\u0456\u0440\u0443"},
 gbi(){return"\u049a\u043e\u044e"},
 gbe(){return"\u0411\u0430\u0440\u043b\u044b\u0493\u044b\u043d \u0442\u0430\u04a3\u0434\u0430\u0443"}}
-A.aa6.prototype={}
+A.aa8.prototype={}
 var z=a.updateTypes([])
-A.aT1.prototype={
-$1(d){return A.bmQ(this.a,d)},
+A.aT5.prototype={
+$1(d){return A.bmU(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aa6,B.a_)
-x(A.Z5,A.aa6)
-x(A.aOs,B.aZ)
-x(A.aT1,B.aR)
-y(A.aa6,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Z5":{"a_":[]}}'))};
-(a=>{a["ntdK7ILTydxg1s9RyCvHR9780K4="]=a.current})($__dart_deferred_initializers__);
+x(A.aa8,B.a_)
+x(A.Z8,A.aa8)
+x(A.aOu,B.aZ)
+x(A.aT5,B.aR)
+y(A.aa8,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Z8":{"a_":[]}}'))};
+(a=>{a["VbPiAbQNeMdU8ykEWuOn6RPB18k="]=a.current})($__dart_deferred_initializers__);