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_111.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={
-b4R(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.ZK(v,u)
+b4V(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.ZN(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnK(u)
+v.r=A.bnO(u)
 return u},
-bmq(d,e){var y
+bmu(d,e){var y
 A:{if("timePicker.hours"===e){y="Gi\u1edd"
 break A}if("timePicker.minutes"===e){y="Ph\xfat"
 break A}if("timePicker.seconds"===e){y="Gi\xe2y"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Ch\u1ecdn t\u1ea5t c\u1ea3"
 break A}if("keyboardToolbar.done"===e){y="Xong"
 break A}y=null
 break A}return y},
-bnK(d){return new A.aSC(d)},
-ZK:function ZK(d,e){var _=this
+bnO(d){return new A.aSG(d)},
+ZN:function ZN(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aP6:function aP6(){},
-aSC:function aSC(d){this.a=d},
-aaL:function aaL(){}}
+aP8:function aP8(){},
+aSG:function aSG(d){this.a=d},
+aaN:function aaN(){}}
 B=c[0]
 A=a.updateHolder(c[81],A)
-A.ZK.prototype={
+A.ZN.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aP6()}return x},
+x=y.z=new A.aP8()}return x},
 gb9(){return this.r}}
-A.aP6.prototype={
+A.aP8.prototype={
 gbh(){return"C\u1eaft"},
 gbg(){return"Sao ch\xe9p"},
 gbi(){return"D\xe1n"},
 gbe(){return"Ch\u1ecdn t\u1ea5t c\u1ea3"}}
-A.aaL.prototype={}
+A.aaN.prototype={}
 var z=a.updateTypes([])
-A.aSC.prototype={
-$1(d){return A.bmq(this.a,d)},
+A.aSG.prototype={
+$1(d){return A.bmu(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aaL,B.a_)
-x(A.ZK,A.aaL)
-x(A.aP6,B.aZ)
-x(A.aSC,B.aR)
-y(A.aaL,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"ZK":{"a_":[]}}'))};
-(a=>{a["2qNdvxDtsO3T7ys2NTZ5FQLvkpk="]=a.current})($__dart_deferred_initializers__);
+x(A.aaN,B.a_)
+x(A.ZN,A.aaN)
+x(A.aP8,B.aZ)
+x(A.aSG,B.aR)
+y(A.aaN,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"ZN":{"a_":[]}}'))};
+(a=>{a["d/sazv2DC0JLB+RPBG5vVduNO1g="]=a.current})($__dart_deferred_initializers__);