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_92.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={
-b4z(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zs(v,u)
+b4D(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zv(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnL(u)
+v.r=A.bnP(u)
 return u},
-bmr(d,e){var y
+bmv(d,e){var y
 A:{if("timePicker.hours"===e){y="Ore"
 break A}if("timePicker.minutes"===e){y="Minute"
 break A}if("timePicker.seconds"===e){y="Secunde"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Selecteaz\u0103 tot"
 break A}if("keyboardToolbar.done"===e){y="Terminat"
 break A}y=null
 break A}return y},
-bnL(d){return new A.aSD(d)},
-Zs:function Zs(d,e){var _=this
+bnP(d){return new A.aSH(d)},
+Zv:function Zv(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOP:function aOP(){},
-aSD:function aSD(d){this.a=d},
-aat:function aat(){}}
+aOR:function aOR(){},
+aSH:function aSH(d){this.a=d},
+aav:function aav(){}}
 B=c[0]
 A=a.updateHolder(c[63],A)
-A.Zs.prototype={
+A.Zv.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOP()}return x},
+x=y.z=new A.aOR()}return x},
 gb9(){return this.r}}
-A.aOP.prototype={
+A.aOR.prototype={
 gbh(){return"Taie"},
 gbg(){return"Copiaz\u0103"},
 gbi(){return"Lipe\u0219te"},
 gbe(){return"Selecteaz\u0103 tot"}}
-A.aat.prototype={}
+A.aav.prototype={}
 var z=a.updateTypes([])
-A.aSD.prototype={
-$1(d){return A.bmr(this.a,d)},
+A.aSH.prototype={
+$1(d){return A.bmv(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aat,B.a_)
-x(A.Zs,A.aat)
-x(A.aOP,B.aZ)
-x(A.aSD,B.aR)
-y(A.aat,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Zs":{"a_":[]}}'))};
-(a=>{a["0VLSHWZtmf/x+R1TI4DH6q4lO3o="]=a.current})($__dart_deferred_initializers__);
+x(A.aav,B.a_)
+x(A.Zv,A.aav)
+x(A.aOR,B.aZ)
+x(A.aSH,B.aR)
+y(A.aav,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zv":{"a_":[]}}'))};
+(a=>{a["Td61HCPowuVSjPYbEGPBmKRT3fk="]=a.current})($__dart_deferred_initializers__);