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_54.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={
-b44(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.YY(v,u)
+b48(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Z0(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boi(u)
+v.r=A.bom(u)
 return u},
-bmZ(d,e){var y
+bn2(d,e){var y
 A:{if("timePicker.hours"===e){y="Sati"
 break A}if("timePicker.minutes"===e){y="Minute"
 break A}if("timePicker.seconds"===e){y="Sekunde"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Odaberi sve"
 break A}if("keyboardToolbar.done"===e){y="Gotovo"
 break A}y=null
 break A}return y},
-boi(d){return new A.aTa(d)},
-YY:function YY(d,e){var _=this
+bom(d){return new A.aTe(d)},
+Z0:function Z0(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOk:function aOk(){},
-aTa:function aTa(d){this.a=d},
-a9Z:function a9Z(){}}
+aOm:function aOm(){},
+aTe:function aTe(d){this.a=d},
+aa0:function aa0(){}}
 B=c[0]
 A=a.updateHolder(c[32],A)
-A.YY.prototype={
+A.Z0.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOk()}return x},
+x=y.z=new A.aOm()}return x},
 gb9(){return this.r}}
-A.aOk.prototype={
+A.aOm.prototype={
 gbh(){return"Izre\u017ei"},
 gbg(){return"Kopiraj"},
 gbi(){return"Zalijepi"},
 gbe(){return"Odaberi sve"}}
-A.a9Z.prototype={}
+A.aa0.prototype={}
 var z=a.updateTypes([])
-A.aTa.prototype={
-$1(d){return A.bmZ(this.a,d)},
+A.aTe.prototype={
+$1(d){return A.bn2(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9Z,B.a_)
-x(A.YY,A.a9Z)
-x(A.aOk,B.aZ)
-x(A.aTa,B.aR)
-y(A.a9Z,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"YY":{"a_":[]}}'))};
-(a=>{a["vGwZolkI8Kl2cha7ody+blRKbYs="]=a.current})($__dart_deferred_initializers__);
+x(A.aa0,B.a_)
+x(A.Z0,A.aa0)
+x(A.aOm,B.aZ)
+x(A.aTe,B.aR)
+y(A.aa0,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Z0":{"a_":[]}}'))};
+(a=>{a["TyNVBJKY5ho0Ga071pHlM75mbbc="]=a.current})($__dart_deferred_initializers__);