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_102.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={
-b4I(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.ZB(v,u)
+b4M(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.ZE(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnB(u)
+v.r=A.bnF(u)
 return u},
-bmh(d,e){var y
+bml(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0bae\u0ba3\u0bbf"
 break A}if("timePicker.minutes"===e){y="\u0ba8\u0bbf\u0bae\u0bbf\u0b9f\u0b99\u0bcd\u0b95\u0bb3\u0bcd"
 break A}if("timePicker.seconds"===e){y="\u0bb5\u0bbf\u0ba8\u0bbe\u0b9f\u0bbf\u0b95\u0bb3\u0bcd"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0b85\u0ba9\u0bc8\u0ba4\u0bcd\u0ba4\u0bc8\
 break A}if("keyboardToolbar.done"===e){y="\u0bae\u0bc1\u0b9f\u0bbf\u0ba8\u0bcd\u0ba4\u0ba4\u0bc1"
 break A}y=null
 break A}return y},
-bnB(d){return new A.aSt(d)},
-ZB:function ZB(d,e){var _=this
+bnF(d){return new A.aSx(d)},
+ZE:function ZE(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOY:function aOY(){},
-aSt:function aSt(d){this.a=d},
-aaC:function aaC(){}}
+aP_:function aP_(){},
+aSx:function aSx(d){this.a=d},
+aaE:function aaE(){}}
 B=c[0]
 A=a.updateHolder(c[72],A)
-A.ZB.prototype={
+A.ZE.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOY()}return x},
+x=y.z=new A.aP_()}return x},
 gb9(){return this.r}}
-A.aOY.prototype={
+A.aP_.prototype={
 gbh(){return"\u0bb5\u0bc6\u0b9f\u0bcd\u0b9f\u0bc1"},
 gbg(){return"\u0ba8\u0b95\u0bb2\u0bc6\u0b9f\u0bc1"},
 gbi(){return"\u0b92\u0b9f\u0bcd\u0b9f\u0bc1"},
 gbe(){return"\u0b85\u0ba9\u0bc8\u0ba4\u0bcd\u0ba4\u0bc8\u0baf\u0bc1\u0bae\u0bcd \u0ba4\u0bc7\u0bb0\u0bcd\u0ba8\u0bcd\u0ba4\u0bc6\u0b9f\u0bc1"}}
-A.aaC.prototype={}
+A.aaE.prototype={}
 var z=a.updateTypes([])
-A.aSt.prototype={
-$1(d){return A.bmh(this.a,d)},
+A.aSx.prototype={
+$1(d){return A.bml(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aaC,B.a_)
-x(A.ZB,A.aaC)
-x(A.aOY,B.aZ)
-x(A.aSt,B.aR)
-y(A.aaC,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"ZB":{"a_":[]}}'))};
-(a=>{a["5IDSXcvronGfLV2FFeB2cAdzFQ4="]=a.current})($__dart_deferred_initializers__);
+x(A.aaE,B.a_)
+x(A.ZE,A.aaE)
+x(A.aP_,B.aZ)
+x(A.aSx,B.aR)
+y(A.aaE,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"ZE":{"a_":[]}}'))};
+(a=>{a["MboVBspV1UTshLtVwwGPv1c5Jhg="]=a.current})($__dart_deferred_initializers__);