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_6.part.js

@@ -1,15 +1,15 @@
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-b3u(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Yt(v,u)
+b3E(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Yx(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boy(u)
+v.r=A.boL(u)
 return u},
-bne(d,e){var y
+bnr(d,e){var y
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@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u062a\u062d\u062f\u064a\u062f \u0627\u0644
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-boy(d){return new A.aTv(d)},
-Yt:function Yt(d,e){var _=this
+boL(d){return new A.aTD(d)},
+Yx:function Yx(d,e){var _=this
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-aTv:function aTv(d){this.a=d},
-a9u:function a9u(){}}
+aNU:function aNU(){},
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+a9y:function a9y(){}}
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+A.Yx.prototype={
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-x=y.z=new A.aNO()}return x},
+x=y.z=new A.aNU()}return x},
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-A.a9u.prototype={}
+A.a9y.prototype={}
 var z=a.updateTypes([])
-A.aTv.prototype={
-$1(d){return A.bne(this.a,d)},
+A.aTD.prototype={
+$1(d){return A.bnr(this.a,d)},
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-x(A.aTv,B.aR)
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-B.b3(b.typeUniverse,JSON.parse('{"Yt":{"a_":[]}}'))};
-(a=>{a["/hJbVU9/ktbgoQWYyai/Ls/4swE="]=a.current})($__dart_deferred_initializers__);
+x(A.a9y,B.a_)
+x(A.Yx,A.a9y)
+x(A.aNU,B.aZ)
+x(A.aTD,B.aR)
+y(A.a9y,B.aX)})()
+B.b4(b.typeUniverse,JSON.parse('{"Yx":{"a_":[]}}'))};
+(a=>{a["OvOQMjg6+0T9EfLV2gQ8cVxOIkg="]=a.current})($__dart_deferred_initializers__);