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_6.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={
-b3E(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Yx(v,u)
+b3I(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.YA(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boL(u)
+v.r=A.boP(u)
 return u},
-bnr(d,e){var y
+bnv(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0633\u0627\u0639\u0627\u062a"
 break A}if("timePicker.minutes"===e){y="\u062f\u0642\u0627\u0626\u0642"
 break A}if("timePicker.seconds"===e){y="\u062b\u0648\u0627\u0646\u064a"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u062a\u062d\u062f\u064a\u062f \u0627\u0644
 break A}if("keyboardToolbar.done"===e){y="\u062a\u0645"
 break A}y=null
 break A}return y},
-boL(d){return new A.aTD(d)},
-Yx:function Yx(d,e){var _=this
+boP(d){return new A.aTH(d)},
+YA:function YA(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aNU:function aNU(){},
-aTD:function aTD(d){this.a=d},
-a9y:function a9y(){}}
+aNW:function aNW(){},
+aTH:function aTH(d){this.a=d},
+a9A:function a9A(){}}
 B=c[0]
 A=a.updateHolder(c[5],A)
-A.Yx.prototype={
+A.YA.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aNU()}return x},
+x=y.z=new A.aNW()}return x},
 gb9(){return this.r}}
-A.aNU.prototype={
+A.aNW.prototype={
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 gbg(){return"\u0646\u0633\u062e"},
 gbi(){return"\u0644\u0635\u0642"},
 gbe(){return"\u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0643\u0644"}}
-A.a9y.prototype={}
+A.a9A.prototype={}
 var z=a.updateTypes([])
-A.aTD.prototype={
-$1(d){return A.bnr(this.a,d)},
+A.aTH.prototype={
+$1(d){return A.bnv(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9y,B.a_)
-x(A.Yx,A.a9y)
-x(A.aNU,B.aZ)
-x(A.aTD,B.aR)
-y(A.a9y,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Yx":{"a_":[]}}'))};
-(a=>{a["OvOQMjg6+0T9EfLV2gQ8cVxOIkg="]=a.current})($__dart_deferred_initializers__);
+x(A.a9A,B.a_)
+x(A.YA,A.a9A)
+x(A.aNW,B.aZ)
+x(A.aTH,B.aR)
+y(A.a9A,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"YA":{"a_":[]}}'))};
+(a=>{a["cXVVkLvBf53wFLs+pxgkh9E31cY="]=a.current})($__dart_deferred_initializers__);