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_60.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={
-b49(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Z2(v,u)
+b4d(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Z5(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boc(u)
+v.r=A.bog(u)
 return u},
-bmT(d,e){var y
+bmX(d,e){var y
 A:{if("timePicker.hours"===e){y="Ore"
 break A}if("timePicker.minutes"===e){y="Minuti"
 break A}if("timePicker.seconds"===e){y="Secondi"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Seleziona tutto"
 break A}if("keyboardToolbar.done"===e){y="Fine"
 break A}y=null
 break A}return y},
-boc(d){return new A.aT4(d)},
-Z2:function Z2(d,e){var _=this
+bog(d){return new A.aT8(d)},
+Z5:function Z5(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOp:function aOp(){},
-aT4:function aT4(d){this.a=d},
-aa3:function aa3(){}}
+aOr:function aOr(){},
+aT8:function aT8(d){this.a=d},
+aa5:function aa5(){}}
 B=c[0]
 A=a.updateHolder(c[37],A)
-A.Z2.prototype={
+A.Z5.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOp()}return x},
+x=y.z=new A.aOr()}return x},
 gb9(){return this.r}}
-A.aOp.prototype={
+A.aOr.prototype={
 gbh(){return"Taglia"},
 gbg(){return"Copia"},
 gbi(){return"Incolla"},
 gbe(){return"Seleziona tutto"}}
-A.aa3.prototype={}
+A.aa5.prototype={}
 var z=a.updateTypes([])
-A.aT4.prototype={
-$1(d){return A.bmT(this.a,d)},
+A.aT8.prototype={
+$1(d){return A.bmX(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aa3,B.a_)
-x(A.Z2,A.aa3)
-x(A.aOp,B.aZ)
-x(A.aT4,B.aR)
-y(A.aa3,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Z2":{"a_":[]}}'))};
-(a=>{a["gDDI0jAe2V85cYcNXze+CpQWI3w="]=a.current})($__dart_deferred_initializers__);
+x(A.aa5,B.a_)
+x(A.Z5,A.aa5)
+x(A.aOr,B.aZ)
+x(A.aT8,B.aR)
+y(A.aa5,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Z5":{"a_":[]}}'))};
+(a=>{a["bLnxi81YRm/xtnItDnpP+CxpJyA="]=a.current})($__dart_deferred_initializers__);