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_71.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={
-b4f(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Z8(v,u)
+b4j(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zb(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bo6(u)
+v.r=A.boa(u)
 return u},
-bmN(d,e){var y
+bmR(d,e){var y
 A:{if("timePicker.hours"===e){y="\uc2dc\uac04"
 break A}if("timePicker.minutes"===e){y="\ubd84"
 break A}if("timePicker.seconds"===e){y="\ucd08"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\uc804\uccb4 \uc120\ud0dd"
 break A}if("keyboardToolbar.done"===e){y="\uc644\ub8cc"
 break A}y=null
 break A}return y},
-bo6(d){return new A.aSZ(d)},
-Z8:function Z8(d,e){var _=this
+boa(d){return new A.aT2(d)},
+Zb:function Zb(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOv:function aOv(){},
-aSZ:function aSZ(d){this.a=d},
-aa9:function aa9(){}}
+aOx:function aOx(){},
+aT2:function aT2(d){this.a=d},
+aab:function aab(){}}
 B=c[0]
 A=a.updateHolder(c[43],A)
-A.Z8.prototype={
+A.Zb.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOv()}return x},
+x=y.z=new A.aOx()}return x},
 gb9(){return this.r}}
-A.aOv.prototype={
+A.aOx.prototype={
 gbh(){return"\uc798\ub77c\ub0b4\uae30"},
 gbg(){return"\ubcf5\uc0ac"},
 gbi(){return"\ubd99\uc5ec\ub123\uae30"},
 gbe(){return"\uc804\uccb4 \uc120\ud0dd"}}
-A.aa9.prototype={}
+A.aab.prototype={}
 var z=a.updateTypes([])
-A.aSZ.prototype={
-$1(d){return A.bmN(this.a,d)},
+A.aT2.prototype={
+$1(d){return A.bmR(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aa9,B.a_)
-x(A.Z8,A.aa9)
-x(A.aOv,B.aZ)
-x(A.aSZ,B.aR)
-y(A.aa9,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Z8":{"a_":[]}}'))};
-(a=>{a["IC4xneYj+22aE7F9hSmXzXDm1mQ="]=a.current})($__dart_deferred_initializers__);
+x(A.aab,B.a_)
+x(A.Zb,A.aab)
+x(A.aOx,B.aZ)
+x(A.aT2,B.aR)
+y(A.aab,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zb":{"a_":[]}}'))};
+(a=>{a["KNBgMa37w4uV1r5DYiHBnkyOsf4="]=a.current})($__dart_deferred_initializers__);