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_19.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={
-b3K(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.YD(v,u)
+b3O(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.YG(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boF(u)
+v.r=A.boJ(u)
 return u},
-bnl(d,e){var y
+bnp(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0f46\u0f74\u0f0b\u0f5a\u0f7c\u0f51\u0f0d"
 break A}if("timePicker.minutes"===e){y="\u0f66\u0f90\u0f62\u0f0b\u0f58\u0f0d"
 break A}if("timePicker.seconds"===e){y="\u0f66\u0f90\u0f62\u0f0b\u0f46\u0f0d"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0f5a\u0f44\u0f0b\u0f58\u0f0b\u0f60\u0f51\
 break A}if("keyboardToolbar.done"===e){y="\u0f60\u0f42\u0fb2\u0f74\u0f56\u0f0d"
 break A}y=null
 break A}return y},
-boF(d){return new A.aTx(d)},
-YD:function YD(d,e){var _=this
+boJ(d){return new A.aTB(d)},
+YG:function YG(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aO_:function aO_(){},
-aTx:function aTx(d){this.a=d},
-a9E:function a9E(){}}
+aO1:function aO1(){},
+aTB:function aTB(d){this.a=d},
+a9G:function a9G(){}}
 B=c[0]
 A=a.updateHolder(c[11],A)
-A.YD.prototype={
+A.YG.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aO_()}return x},
+x=y.z=new A.aO1()}return x},
 gb9(){return this.r}}
-A.aO_.prototype={
+A.aO1.prototype={
 gbh(){return"\u0f42\u0f45\u0f7c\u0f51\u0f0d"},
 gbg(){return"\u0f56\u0f7a\u0f51\u0f0b\u0f66\u0fa4\u0fb1\u0f7c\u0f51\u0f0d"},
 gbi(){return"\u0f66\u0fa6\u0fb1\u0f62\u0f0d"},
 gbe(){return"\u0f5a\u0f44\u0f0b\u0f58\u0f0b\u0f60\u0f51\u0f7a\u0f58\u0f66\u0f0d"}}
-A.a9E.prototype={}
+A.a9G.prototype={}
 var z=a.updateTypes([])
-A.aTx.prototype={
-$1(d){return A.bnl(this.a,d)},
+A.aTB.prototype={
+$1(d){return A.bnp(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9E,B.a_)
-x(A.YD,A.a9E)
-x(A.aO_,B.aZ)
-x(A.aTx,B.aR)
-y(A.a9E,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"YD":{"a_":[]}}'))};
-(a=>{a["d5vmkO893CgA5saOT8p5Up+g4l4="]=a.current})($__dart_deferred_initializers__);
+x(A.a9G,B.a_)
+x(A.YG,A.a9G)
+x(A.aO1,B.aZ)
+x(A.aTB,B.aR)
+y(A.a9G,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"YG":{"a_":[]}}'))};
+(a=>{a["37Kk1kfo0uVkPB12z3YS7s21W6o="]=a.current})($__dart_deferred_initializers__);