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_56.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={
-b46(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Z_(v,u)
+b4a(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Z2(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},
-bmW(d,e){var y
+bn_(d,e){var y
 A:{if("timePicker.hours"===e){y="\u053a\u0561\u0574"
 break A}if("timePicker.minutes"===e){y="\u0550\u0578\u057a\u0565"
 break A}if("timePicker.seconds"===e){y="\u054e\u0561\u0575\u0580\u056f\u0575\u0561\u0576"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0538\u0576\u057f\u0580\u0565\u056c \u0562
 break A}if("keyboardToolbar.done"===e){y="\u054a\u0561\u057f\u0580\u0561\u057d\u057f"
 break A}y=null
 break A}return y},
-bof(d){return new A.aT7(d)},
-Z_:function Z_(d,e){var _=this
+boj(d){return new A.aTb(d)},
+Z2:function Z2(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOm:function aOm(){},
-aT7:function aT7(d){this.a=d},
-aa0:function aa0(){}}
+aOo:function aOo(){},
+aTb:function aTb(d){this.a=d},
+aa2:function aa2(){}}
 B=c[0]
 A=a.updateHolder(c[34],A)
-A.Z_.prototype={
+A.Z2.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOm()}return x},
+x=y.z=new A.aOo()}return x},
 gb9(){return this.r}}
-A.aOm.prototype={
+A.aOo.prototype={
 gbh(){return"\u053f\u057f\u0580\u0565\u056c"},
 gbg(){return"\u054a\u0561\u057f\u0573\u0565\u0576\u0565\u056c"},
 gbi(){return"\u054f\u0565\u0572\u0561\u0564\u0580\u0565\u056c"},
 gbe(){return"\u0538\u0576\u057f\u0580\u0565\u056c \u0562\u0578\u056c\u0578\u0580\u0568"}}
-A.aa0.prototype={}
+A.aa2.prototype={}
 var z=a.updateTypes([])
-A.aT7.prototype={
-$1(d){return A.bmW(this.a,d)},
+A.aTb.prototype={
+$1(d){return A.bn_(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aa0,B.a_)
-x(A.Z_,A.aa0)
-x(A.aOm,B.aZ)
-x(A.aT7,B.aR)
-y(A.aa0,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Z_":{"a_":[]}}'))};
-(a=>{a["tL3//UwMhQFFudzwWVkWWlJ7fos="]=a.current})($__dart_deferred_initializers__);
+x(A.aa2,B.a_)
+x(A.Z2,A.aa2)
+x(A.aOo,B.aZ)
+x(A.aTb,B.aR)
+y(A.aa2,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Z2":{"a_":[]}}'))};
+(a=>{a["rsDC+iLKhlZNr+GG7LpTXMUNCWo="]=a.current})($__dart_deferred_initializers__);