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_42.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={
-b3V(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.YO(v,u)
+b3Z(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.YR(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bot(u)
+v.r=A.box(u)
 return u},
-bn9(d,e){var y
+bnd(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0633\u0627\u0639\u062a"
 break A}if("timePicker.minutes"===e){y="\u062f\u0642\u06cc\u0642\u0647"
 break A}if("timePicker.seconds"===e){y="\u062b\u0627\u0646\u06cc\u0647"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0627\u0646\u062a\u062e\u0627\u0628 \u0647
 break A}if("keyboardToolbar.done"===e){y="\u062a\u0645\u0627\u0645"
 break A}y=null
 break A}return y},
-bot(d){return new A.aTl(d)},
-YO:function YO(d,e){var _=this
+box(d){return new A.aTp(d)},
+YR:function YR(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOa:function aOa(){},
-aTl:function aTl(d){this.a=d},
-a9P:function a9P(){}}
+aOc:function aOc(){},
+aTp:function aTp(d){this.a=d},
+a9R:function a9R(){}}
 B=c[0]
 A=a.updateHolder(c[22],A)
-A.YO.prototype={
+A.YR.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOa()}return x},
+x=y.z=new A.aOc()}return x},
 gb9(){return this.r}}
-A.aOa.prototype={
+A.aOc.prototype={
 gbh(){return"\u0628\u0631\u0634"},
 gbg(){return"\u06a9\u067e\u06cc"},
 gbi(){return"\u0686\u0633\u0628\u0627\u0646\u062f\u0646"},
 gbe(){return"\u0627\u0646\u062a\u062e\u0627\u0628 \u0647\u0645\u0647"}}
-A.a9P.prototype={}
+A.a9R.prototype={}
 var z=a.updateTypes([])
-A.aTl.prototype={
-$1(d){return A.bn9(this.a,d)},
+A.aTp.prototype={
+$1(d){return A.bnd(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9P,B.a_)
-x(A.YO,A.a9P)
-x(A.aOa,B.aZ)
-x(A.aTl,B.aR)
-y(A.a9P,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"YO":{"a_":[]}}'))};
-(a=>{a["Vaa3cbRd5VvZGH07JqvkvXQLQ48="]=a.current})($__dart_deferred_initializers__);
+x(A.a9R,B.a_)
+x(A.YR,A.a9R)
+x(A.aOc,B.aZ)
+x(A.aTp,B.aR)
+y(A.a9R,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"YR":{"a_":[]}}'))};
+(a=>{a["cb3hSH3oUQaJqQPAFRyAbem7b9g="]=a.current})($__dart_deferred_initializers__);