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_94.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={
-b4B(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zu(v,u)
+b4F(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zx(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnI(u)
+v.r=A.bnM(u)
 return u},
-bmo(d,e){var y
+bms(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0db4\u0dd0\u0dba"
 break A}if("timePicker.minutes"===e){y="\u0db8\u0dd2\u0db1\u0dd2\u0dad\u0dca\u0dad\u0dd4"
 break A}if("timePicker.seconds"===e){y="\u0dad\u0dad\u0dca\u0db4\u0dbb"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0dc3\u0dd2\u0dba\u0dbd\u0dca\u0dbd \u0dad
 break A}if("keyboardToolbar.done"===e){y="\u0dc3\u0dd2\u0daf\u0dd4 \u0dc0\u0dd2\u0dba"
 break A}y=null
 break A}return y},
-bnI(d){return new A.aSA(d)},
-Zu:function Zu(d,e){var _=this
+bnM(d){return new A.aSE(d)},
+Zx:function Zx(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOR:function aOR(){},
-aSA:function aSA(d){this.a=d},
-aav:function aav(){}}
+aOT:function aOT(){},
+aSE:function aSE(d){this.a=d},
+aax:function aax(){}}
 B=c[0]
 A=a.updateHolder(c[65],A)
-A.Zu.prototype={
+A.Zx.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOR()}return x},
+x=y.z=new A.aOT()}return x},
 gb9(){return this.r}}
-A.aOR.prototype={
+A.aOT.prototype={
 gbh(){return"\u0d9a\u0db4\u0db1\u0dca\u0db1"},
 gbg(){return"\u0db4\u0dd2\u0da7\u0db4\u0dad\u0dca \u0d9a\u0dbb\u0db1\u0dca\u0db1"},
 gbi(){return"\u0d85\u0dbd\u0dc0\u0db1\u0dca\u0db1"},
 gbe(){return"\u0dc3\u0dd2\u0dba\u0dbd\u0dca\u0dbd \u0dad\u0ddd\u0dbb\u0db1\u0dca\u0db1"}}
-A.aav.prototype={}
+A.aax.prototype={}
 var z=a.updateTypes([])
-A.aSA.prototype={
-$1(d){return A.bmo(this.a,d)},
+A.aSE.prototype={
+$1(d){return A.bms(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aav,B.a_)
-x(A.Zu,A.aav)
-x(A.aOR,B.aZ)
-x(A.aSA,B.aR)
-y(A.aav,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Zu":{"a_":[]}}'))};
-(a=>{a["WIT0K3NmPV8wiwOkdbg27SUjAoU="]=a.current})($__dart_deferred_initializers__);
+x(A.aax,B.a_)
+x(A.Zx,A.aax)
+x(A.aOT,B.aZ)
+x(A.aSE,B.aR)
+y(A.aax,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zx":{"a_":[]}}'))};
+(a=>{a["CCd2TcoM7xw3/lZsYqSxJawbmPM="]=a.current})($__dart_deferred_initializers__);