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_52.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={
-b43(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.YX(v,u)
+b47(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Z_(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.boj(u)
+v.r=A.bon(u)
 return u},
-bn_(d,e){var y
+bn3(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0918\u0902\u091f\u0947"
 break A}if("timePicker.minutes"===e){y="\u092e\u093f\u0928\u091f"
 break A}if("timePicker.seconds"===e){y="\u0938\u0947\u0915\u0902\u0921"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0938\u092d\u0940 \u091a\u0941\u0928\u0947
 break A}if("keyboardToolbar.done"===e){y="\u0939\u094b \u0917\u092f\u093e"
 break A}y=null
 break A}return y},
-boj(d){return new A.aTb(d)},
-YX:function YX(d,e){var _=this
+bon(d){return new A.aTf(d)},
+Z_:function Z_(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOj:function aOj(){},
-aTb:function aTb(d){this.a=d},
-a9Y:function a9Y(){}}
+aOl:function aOl(){},
+aTf:function aTf(d){this.a=d},
+aa_:function aa_(){}}
 B=c[0]
 A=a.updateHolder(c[31],A)
-A.YX.prototype={
+A.Z_.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOj()}return x},
+x=y.z=new A.aOl()}return x},
 gb9(){return this.r}}
-A.aOj.prototype={
+A.aOl.prototype={
 gbh(){return"\u0915\u093e\u091f\u0947\u0902"},
 gbg(){return"\u0915\u0949\u092a\u0940 \u0915\u0930\u0947\u0902"},
 gbi(){return"\u092a\u0947\u0938\u094d\u091f \u0915\u0930\u0947\u0902"},
 gbe(){return"\u0938\u092d\u0940 \u091a\u0941\u0928\u0947\u0902"}}
-A.a9Y.prototype={}
+A.aa_.prototype={}
 var z=a.updateTypes([])
-A.aTb.prototype={
-$1(d){return A.bn_(this.a,d)},
+A.aTf.prototype={
+$1(d){return A.bn3(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.a9Y,B.a_)
-x(A.YX,A.a9Y)
-x(A.aOj,B.aZ)
-x(A.aTb,B.aR)
-y(A.a9Y,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"YX":{"a_":[]}}'))};
-(a=>{a["s2m/iTMj1bCzAIrj6S6sh+uqq5o="]=a.current})($__dart_deferred_initializers__);
+x(A.aa_,B.a_)
+x(A.Z_,A.aa_)
+x(A.aOl,B.aZ)
+x(A.aTf,B.aR)
+y(A.aa_,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Z_":{"a_":[]}}'))};
+(a=>{a["ZA1wZGnwwoNcQDDPPl9E8g5Ex7g="]=a.current})($__dart_deferred_initializers__);