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_104.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={
-b4K(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.ZD(v,u)
+b4O(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.ZG(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boP(u)
+v.r=A.boT(u)
 return u},
-bnv(d,e){var y
+bnz(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0e0a\u0e31\u0e48\u0e27\u0e42\u0e21\u0e07"
 break A}if("timePicker.minutes"===e){y="\u0e19\u0e32\u0e17\u0e35"
 break A}if("timePicker.seconds"===e){y="\u0e27\u0e34\u0e19\u0e32\u0e17\u0e35"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0e40\u0e25\u0e37\u0e2d\u0e01\u0e17\u0e31\
 break A}if("keyboardToolbar.done"===e){y="\u0e40\u0e2a\u0e23\u0e47\u0e08\u0e2a\u0e34\u0e49\u0e19"
 break A}y=null
 break A}return y},
-boP(d){return new A.aTH(d)},
-ZD:function ZD(d,e){var _=this
+boT(d){return new A.aTL(d)},
+ZG:function ZG(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aP_:function aP_(){},
-aTH:function aTH(d){this.a=d},
-aaE:function aaE(){}}
+aP1:function aP1(){},
+aTL:function aTL(d){this.a=d},
+aaG:function aaG(){}}
 B=c[0]
 A=a.updateHolder(c[74],A)
-A.ZD.prototype={
+A.ZG.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aP_()}return x},
+x=y.z=new A.aP1()}return x},
 gb9(){return this.r}}
-A.aP_.prototype={
+A.aP1.prototype={
 gbh(){return"\u0e15\u0e31\u0e14"},
 gbg(){return"\u0e04\u0e31\u0e14\u0e25\u0e2d\u0e01"},
 gbi(){return"\u0e27\u0e32\u0e07"},
 gbe(){return"\u0e40\u0e25\u0e37\u0e2d\u0e01\u0e17\u0e31\u0e49\u0e07\u0e2b\u0e21\u0e14"}}
-A.aaE.prototype={}
+A.aaG.prototype={}
 var z=a.updateTypes([])
-A.aTH.prototype={
-$1(d){return A.bnv(this.a,d)},
+A.aTL.prototype={
+$1(d){return A.bnz(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aaE,B.a_)
-x(A.ZD,A.aaE)
-x(A.aP_,B.aZ)
-x(A.aTH,B.aR)
-y(A.aaE,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"ZD":{"a_":[]}}'))};
-(a=>{a["+PtWhGDihbOdikwXYaAMbtVGxB0="]=a.current})($__dart_deferred_initializers__);
+x(A.aaG,B.a_)
+x(A.ZG,A.aaG)
+x(A.aP1,B.aZ)
+x(A.aTL,B.aR)
+y(A.aaG,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"ZG":{"a_":[]}}'))};
+(a=>{a["fBe3d+j5qGhdKqyMp7BEmlIhSjY="]=a.current})($__dart_deferred_initializers__);