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_47.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={
-b3Z(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.YS(v,u)
+b42(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.YV(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boo(u)
+v.r=A.bos(u)
 return u},
-bn4(d,e){var y
+bn8(d,e){var y
 A:{if("timePicker.hours"===e){y="Uaireanta"
 break A}if("timePicker.minutes"===e){y="N\xf3im\xe9id"
 break A}if("timePicker.seconds"===e){y="Soicind\xed"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Roghnaigh uile"
 break A}if("keyboardToolbar.done"===e){y="D\xe9anta"
 break A}y=null
 break A}return y},
-boo(d){return new A.aTg(d)},
-YS:function YS(d,e){var _=this
+bos(d){return new A.aTk(d)},
+YV:function YV(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOe:function aOe(){},
-aTg:function aTg(d){this.a=d},
-a9T:function a9T(){}}
+aOg:function aOg(){},
+aTk:function aTk(d){this.a=d},
+a9V:function a9V(){}}
 B=c[0]
 A=a.updateHolder(c[26],A)
-A.YS.prototype={
+A.YV.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOe()}return x},
+x=y.z=new A.aOg()}return x},
 gb9(){return this.r}}
-A.aOe.prototype={
+A.aOg.prototype={
 gbh(){return"Gearr"},
 gbg(){return"C\xf3ipe\xe1il"},
 gbi(){return"Greamaigh"},
 gbe(){return"Roghnaigh uile"}}
-A.a9T.prototype={}
+A.a9V.prototype={}
 var z=a.updateTypes([])
-A.aTg.prototype={
-$1(d){return A.bn4(this.a,d)},
+A.aTk.prototype={
+$1(d){return A.bn8(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9T,B.a_)
-x(A.YS,A.a9T)
-x(A.aOe,B.aZ)
-x(A.aTg,B.aR)
-y(A.a9T,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"YS":{"a_":[]}}'))};
-(a=>{a["F5dwHY37pZ0bvf/MijGTwSdyKj4="]=a.current})($__dart_deferred_initializers__);
+x(A.a9V,B.a_)
+x(A.YV,A.a9V)
+x(A.aOg,B.aZ)
+x(A.aTk,B.aR)
+y(A.a9V,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"YV":{"a_":[]}}'))};
+(a=>{a["wLjNp/y0/Kq3UlhPeHr/Mn7WDuI="]=a.current})($__dart_deferred_initializers__);