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_63.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.Z3(v,u)
+b4e(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Z6(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bob(u)
+v.r=A.bof(u)
 return u},
-bmS(d,e){var y
+bmW(d,e){var y
 A:{if("timePicker.hours"===e){y="\u6642"
 break A}if("timePicker.minutes"===e){y="\u5206"
 break A}if("timePicker.seconds"===e){y="\u79d2"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u3059\u3079\u3066\u9078\u629e"
 break A}if("keyboardToolbar.done"===e){y="\u5b8c\u4e86"
 break A}y=null
 break A}return y},
-bob(d){return new A.aT3(d)},
-Z3:function Z3(d,e){var _=this
+bof(d){return new A.aT7(d)},
+Z6:function Z6(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOq:function aOq(){},
-aT3:function aT3(d){this.a=d},
-aa4:function aa4(){}}
+aOs:function aOs(){},
+aT7:function aT7(d){this.a=d},
+aa6:function aa6(){}}
 B=c[0]
 A=a.updateHolder(c[38],A)
-A.Z3.prototype={
+A.Z6.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){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"\u30ab\u30c3\u30c8"},
 gbg(){return"\u30b3\u30d4\u30fc"},
 gbi(){return"\u30da\u30fc\u30b9\u30c8"},
 gbe(){return"\u3059\u3079\u3066\u9078\u629e"}}
-A.aa4.prototype={}
+A.aa6.prototype={}
 var z=a.updateTypes([])
-A.aT3.prototype={
-$1(d){return A.bmS(this.a,d)},
+A.aT7.prototype={
+$1(d){return A.bmW(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aa4,B.a_)
-x(A.Z3,A.aa4)
-x(A.aOq,B.aZ)
-x(A.aT3,B.aR)
-y(A.aa4,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Z3":{"a_":[]}}'))};
-(a=>{a["nhTMuPVIkacRgd7NRQzeA/+4Q3c="]=a.current})($__dart_deferred_initializers__);
+x(A.aa6,B.a_)
+x(A.Z6,A.aa6)
+x(A.aOs,B.aZ)
+x(A.aT7,B.aR)
+y(A.aa6,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Z6":{"a_":[]}}'))};
+(a=>{a["yB+zm9w8Y2J4T4mfeVFqP4ajhP8="]=a.current})($__dart_deferred_initializers__);