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_77.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={
-b4l(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Ze(v,u)
+b4p(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zh(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bo_(u)
+v.r=A.bo3(u)
 return u},
-bmG(d,e){var y
+bmK(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0d2e\u0d23\u0d3f\u0d15\u0d4d\u0d15\u0d42\u0d7c"
 break A}if("timePicker.minutes"===e){y="\u0d2e\u0d3f\u0d28\u0d3f\u0d31\u0d4d\u0d31\u0d4d"
 break A}if("timePicker.seconds"===e){y="\u0d38\u0d46\u0d15\u0d4d\u0d15\u0d7b\u0d21\u0d4d"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0d0e\u0d32\u0d4d\u0d32\u0d3e\u0d02 \u0d24
 break A}if("keyboardToolbar.done"===e){y="\u0d2a\u0d42\u0d7c\u0d24\u0d4d\u0d24\u0d3f\u0d2f\u0d3e\u0d2f\u0d3f"
 break A}y=null
 break A}return y},
-bo_(d){return new A.aSS(d)},
-Ze:function Ze(d,e){var _=this
+bo3(d){return new A.aSW(d)},
+Zh:function Zh(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOB:function aOB(){},
-aSS:function aSS(d){this.a=d},
-aaf:function aaf(){}}
+aOD:function aOD(){},
+aSW:function aSW(d){this.a=d},
+aah:function aah(){}}
 B=c[0]
 A=a.updateHolder(c[49],A)
-A.Ze.prototype={
+A.Zh.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOB()}return x},
+x=y.z=new A.aOD()}return x},
 gb9(){return this.r}}
-A.aOB.prototype={
+A.aOD.prototype={
 gbh(){return"\u0d2e\u0d41\u0d31\u0d3f\u0d15\u0d4d\u0d15\u0d41\u0d15"},
 gbg(){return"\u0d2a\u0d15\u0d7c\u0d24\u0d4d\u0d24\u0d41\u0d15"},
 gbi(){return"\u0d12\u0d1f\u0d4d\u0d1f\u0d3f\u0d15\u0d4d\u0d15\u0d41\u0d15"},
 gbe(){return"\u0d0e\u0d32\u0d4d\u0d32\u0d3e\u0d02 \u0d24\u0d3f\u0d30\u0d1e\u0d4d\u0d1e\u0d46\u0d1f\u0d41\u0d15\u0d4d\u0d15\u0d41\u0d15"}}
-A.aaf.prototype={}
+A.aah.prototype={}
 var z=a.updateTypes([])
-A.aSS.prototype={
-$1(d){return A.bmG(this.a,d)},
+A.aSW.prototype={
+$1(d){return A.bmK(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aaf,B.a_)
-x(A.Ze,A.aaf)
-x(A.aOB,B.aZ)
-x(A.aSS,B.aR)
-y(A.aaf,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Ze":{"a_":[]}}'))};
-(a=>{a["rAY3fJEfvY2LKmMD913O6A4HLHo="]=a.current})($__dart_deferred_initializers__);
+x(A.aah,B.a_)
+x(A.Zh,A.aah)
+x(A.aOD,B.aZ)
+x(A.aSW,B.aR)
+y(A.aah,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zh":{"a_":[]}}'))};
+(a=>{a["w1svhmnYJ6mJG0WbY7cZM+ji0no="]=a.current})($__dart_deferred_initializers__);