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_70.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={
-b4e(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Z7(v,u)
+b4i(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Za(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bo7(u)
+v.r=A.bob(u)
 return u},
-bmO(d,e){var y
+bmS(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0c97\u0c82\u0c9f\u0cc6\u0c97\u0cb3\u0cc1"
 break A}if("timePicker.minutes"===e){y="\u0ca8\u0cbf\u0cae\u0cbf\u0cb7\u0c97\u0cb3\u0cc1"
 break A}if("timePicker.seconds"===e){y="\u0cb8\u0cc6\u0c95\u0cc6\u0c82\u0ca1\u0cc1\u0c97\u0cb3\u0cc1"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0c8e\u0cb2\u0ccd\u0cb2\u0cb5\u0ca8\u0ccd\
 break A}if("keyboardToolbar.done"===e){y="\u0cae\u0cc1\u0c97\u0cbf\u0ca6\u0cbf\u0ca6\u0cc6"
 break A}y=null
 break A}return y},
-bo7(d){return new A.aT_(d)},
-Z7:function Z7(d,e){var _=this
+bob(d){return new A.aT3(d)},
+Za:function Za(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOu:function aOu(){},
-aT_:function aT_(d){this.a=d},
-aa8:function aa8(){}}
+aOw:function aOw(){},
+aT3:function aT3(d){this.a=d},
+aaa:function aaa(){}}
 B=c[0]
 A=a.updateHolder(c[42],A)
-A.Z7.prototype={
+A.Za.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOu()}return x},
+x=y.z=new A.aOw()}return x},
 gb9(){return this.r}}
-A.aOu.prototype={
+A.aOw.prototype={
 gbh(){return"\u0c95\u0c9f\u0ccd"},
 gbg(){return"\u0c95\u0cbe\u0caa\u0cbf"},
 gbi(){return"\u0caa\u0cc7\u0cb8\u0ccd\u0c9f\u0ccd"},
 gbe(){return"\u0c8e\u0cb2\u0ccd\u0cb2\u0cb5\u0ca8\u0ccd\u0ca8\u0cc2 \u0c86\u0caf\u0ccd\u0c95\u0cc6\u0cae\u0cbe\u0ca1\u0cbf"}}
-A.aa8.prototype={}
+A.aaa.prototype={}
 var z=a.updateTypes([])
-A.aT_.prototype={
-$1(d){return A.bmO(this.a,d)},
+A.aT3.prototype={
+$1(d){return A.bmS(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aa8,B.a_)
-x(A.Z7,A.aa8)
-x(A.aOu,B.aZ)
-x(A.aT_,B.aR)
-y(A.aa8,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Z7":{"a_":[]}}'))};
-(a=>{a["CfxLbOV88zQB0vJ2TR7tQvyY25k="]=a.current})($__dart_deferred_initializers__);
+x(A.aaa,B.a_)
+x(A.Za,A.aaa)
+x(A.aOw,B.aZ)
+x(A.aT3,B.aR)
+y(A.aaa,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Za":{"a_":[]}}'))};
+(a=>{a["C1aMa7MBCK+xdrFrZGAYaCXle+E="]=a.current})($__dart_deferred_initializers__);