feat: 为划转页面账户卡片添加位置互换动画

- 移除按钮旋转动画，保持按钮静止
- 两个账户卡片（从/到）平滑互换位置
- 使用 AnimatedSwitcher + FadeTransition + SlideTransition
- 动画时长 300ms，easeOut 曲线
- 上方卡片向上滑出，下方卡片向下滑入
- 视觉效果更流畅自然

flutter_monisuo/build/web/main.dart.js_59.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={
-b3Z(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.Z1(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bo0(u)
+v.r=A.bod(u)
 return u},
-bmH(d,e){var y
+bmU(d,e){var y
 A:{if("timePicker.hours"===e){y="Klukkustundir"
 break A}if("timePicker.minutes"===e){y="M\xedn\xfatur"
 break A}if("timePicker.seconds"===e){y="Sek\xfandur"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Velja allt"
 break A}if("keyboardToolbar.done"===e){y="Loki\xf0"
 break A}y=null
 break A}return y},
-bo0(d){return new A.aSY(d)},
-YY:function YY(d,e){var _=this
+bod(d){return new A.aT5(d)},
+Z1:function Z1(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOi:function aOi(){},
-aSY:function aSY(d){this.a=d},
-a9Z:function a9Z(){}}
+aOo:function aOo(){},
+aT5:function aT5(d){this.a=d},
+aa2:function aa2(){}}
 B=c[0]
 A=a.updateHolder(c[36],A)
-A.YY.prototype={
+A.Z1.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOi()}return x},
+x=y.z=new A.aOo()}return x},
 gb9(){return this.r}}
-A.aOi.prototype={
+A.aOo.prototype={
 gbh(){return"Klippa"},
 gbg(){return"Afrita"},
 gbi(){return"L\xedma"},
 gbe(){return"Velja allt"}}
-A.a9Z.prototype={}
+A.aa2.prototype={}
 var z=a.updateTypes([])
-A.aSY.prototype={
-$1(d){return A.bmH(this.a,d)},
+A.aT5.prototype={
+$1(d){return A.bmU(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9Z,B.a_)
-x(A.YY,A.a9Z)
-x(A.aOi,B.aZ)
-x(A.aSY,B.aR)
-y(A.a9Z,B.aX)})()
-B.b3(b.typeUniverse,JSON.parse('{"YY":{"a_":[]}}'))};
-(a=>{a["k5YMT8aYE39GbnytWybP0rfyYQI="]=a.current})($__dart_deferred_initializers__);
+x(A.aa2,B.a_)
+x(A.Z1,A.aa2)
+x(A.aOo,B.aZ)
+x(A.aT5,B.aR)
+y(A.aa2,B.aX)})()
+B.b4(b.typeUniverse,JSON.parse('{"Z1":{"a_":[]}}'))};
+(a=>{a["My2RshXDg4SzLzT4oACVPyL+TQw="]=a.current})($__dart_deferred_initializers__);