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_51.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={
-b42(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.YW(v,u)
+b46(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.YZ(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bok(u)
+v.r=A.boo(u)
 return u},
-bn0(d,e){var y
+bn4(d,e){var y
 A:{if("timePicker.hours"===e){y="\u05e9\u05e2\u05d5\u05ea"
 break A}if("timePicker.minutes"===e){y="\u05d3\u05e7\u05d5\u05ea"
 break A}if("timePicker.seconds"===e){y="\u05e9\u05e0\u05d9\u05d5\u05ea"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u05d1\u05d7\u05e8 \u05d4\u05db\u05dc"
 break A}if("keyboardToolbar.done"===e){y="\u05e1\u05d9\u05d5\u05dd"
 break A}y=null
 break A}return y},
-bok(d){return new A.aTc(d)},
-YW:function YW(d,e){var _=this
+boo(d){return new A.aTg(d)},
+YZ:function YZ(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOi:function aOi(){},
-aTc:function aTc(d){this.a=d},
-a9X:function a9X(){}}
+aOk:function aOk(){},
+aTg:function aTg(d){this.a=d},
+a9Z:function a9Z(){}}
 B=c[0]
 A=a.updateHolder(c[30],A)
-A.YW.prototype={
+A.YZ.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOi()}return x},
+x=y.z=new A.aOk()}return x},
 gb9(){return this.r}}
-A.aOi.prototype={
+A.aOk.prototype={
 gbh(){return"\u05d2\u05d6\u05d5\u05e8"},
 gbg(){return"\u05d4\u05e2\u05ea\u05e7"},
 gbi(){return"\u05d4\u05d3\u05d1\u05e7"},
 gbe(){return"\u05d1\u05d7\u05e8 \u05d4\u05db\u05dc"}}
-A.a9X.prototype={}
+A.a9Z.prototype={}
 var z=a.updateTypes([])
-A.aTc.prototype={
-$1(d){return A.bn0(this.a,d)},
+A.aTg.prototype={
+$1(d){return A.bn4(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9X,B.a_)
-x(A.YW,A.a9X)
-x(A.aOi,B.aZ)
-x(A.aTc,B.aR)
-y(A.a9X,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"YW":{"a_":[]}}'))};
-(a=>{a["gfsHJfZa0ggr/NdyUS2izfniFL8="]=a.current})($__dart_deferred_initializers__);
+x(A.a9Z,B.a_)
+x(A.YZ,A.a9Z)
+x(A.aOk,B.aZ)
+x(A.aTg,B.aR)
+y(A.a9Z,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"YZ":{"a_":[]}}'))};
+(a=>{a["MkWQlJSDnbg2G8z3ckO9ka8TBPE="]=a.current})($__dart_deferred_initializers__);