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_5.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={
-b3D(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Yw(v,u)
+b3H(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.boM(u)
+v.r=A.boQ(u)
 return u},
-bns(d,e){var y
+bnw(d,e){var y
 A:{if("timePicker.hours"===e){y="\u1230\u12d3\u1276\u127d"
 break A}if("timePicker.minutes"===e){y="\u12f0\u1242\u1243\u12ce\u127d"
 break A}if("timePicker.seconds"===e){y="\u1230\u12a8\u1295\u12f6\u127d"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u1201\u1209\u1295\u121d \u12ed\u121d\u1228
 break A}if("keyboardToolbar.done"===e){y="\u1270\u12a8\u1293\u12cd\u1297\u120d"
 break A}y=null
 break A}return y},
-boM(d){return new A.aTE(d)},
-Yw:function Yw(d,e){var _=this
+boQ(d){return new A.aTI(d)},
+Yz:function Yz(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aNT:function aNT(){},
-aTE:function aTE(d){this.a=d},
-a9x:function a9x(){}}
+aNV:function aNV(){},
+aTI:function aTI(d){this.a=d},
+a9z:function a9z(){}}
 B=c[0]
 A=a.updateHolder(c[4],A)
-A.Yw.prototype={
+A.Yz.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aNT()}return x},
+x=y.z=new A.aNV()}return x},
 gb9(){return this.r}}
-A.aNT.prototype={
+A.aNV.prototype={
 gbh(){return"\u1241\u1228\u1325"},
 gbg(){return"\u1245\u12f3"},
 gbi(){return"\u1208\u1325\u134d"},
 gbe(){return"\u1201\u1209\u1295\u121d \u12ed\u121d\u1228\u1321"}}
-A.a9x.prototype={}
+A.a9z.prototype={}
 var z=a.updateTypes([])
-A.aTE.prototype={
-$1(d){return A.bns(this.a,d)},
+A.aTI.prototype={
+$1(d){return A.bnw(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9x,B.a_)
-x(A.Yw,A.a9x)
-x(A.aNT,B.aZ)
-x(A.aTE,B.aR)
-y(A.a9x,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Yw":{"a_":[]}}'))};
-(a=>{a["NzLVuHXQv33Whh2hXaige+Hnk84="]=a.current})($__dart_deferred_initializers__);
+x(A.a9z,B.a_)
+x(A.Yz,A.a9z)
+x(A.aNV,B.aZ)
+x(A.aTI,B.aR)
+y(A.a9z,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Yz":{"a_":[]}}'))};
+(a=>{a["d4vhqO0GNUINjzmyDhqW+2DFexI="]=a.current})($__dart_deferred_initializers__);