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_79.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={
-b4n(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zg(v,u)
+b4r(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zj(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnY(u)
+v.r=A.bo1(u)
 return u},
-bmE(d,e){var y
+bmI(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0924\u093e\u0938"
 break A}if("timePicker.minutes"===e){y="\u092e\u093f\u0928\u093f\u091f\u0947"
 break A}if("timePicker.seconds"===e){y="\u0938\u0947\u0915\u0902\u0926"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0938\u0930\u094d\u0935 \u0928\u093f\u0935
 break A}if("keyboardToolbar.done"===e){y="\u092a\u0942\u0930\u094d\u0923"
 break A}y=null
 break A}return y},
-bnY(d){return new A.aSQ(d)},
-Zg:function Zg(d,e){var _=this
+bo1(d){return new A.aSU(d)},
+Zj:function Zj(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOD:function aOD(){},
-aSQ:function aSQ(d){this.a=d},
-aah:function aah(){}}
+aOF:function aOF(){},
+aSU:function aSU(d){this.a=d},
+aaj:function aaj(){}}
 B=c[0]
 A=a.updateHolder(c[51],A)
-A.Zg.prototype={
+A.Zj.prototype={
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 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOD()}return x},
+x=y.z=new A.aOF()}return x},
 gb9(){return this.r}}
-A.aOD.prototype={
+A.aOF.prototype={
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 gbg(){return"\u0915\u0949\u092a\u0940"},
 gbi(){return"\u092a\u0947\u0938\u094d\u091f"},
 gbe(){return"\u0938\u0930\u094d\u0935 \u0928\u093f\u0935\u0921\u093e"}}
-A.aah.prototype={}
+A.aaj.prototype={}
 var z=a.updateTypes([])
-A.aSQ.prototype={
-$1(d){return A.bmE(this.a,d)},
+A.aSU.prototype={
+$1(d){return A.bmI(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aah,B.a_)
-x(A.Zg,A.aah)
-x(A.aOD,B.aZ)
-x(A.aSQ,B.aR)
-y(A.aah,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Zg":{"a_":[]}}'))};
-(a=>{a["gJ/omAe1CEy88lRexPDufWRF2rc="]=a.current})($__dart_deferred_initializers__);
+x(A.aaj,B.a_)
+x(A.Zj,A.aaj)
+x(A.aOF,B.aZ)
+x(A.aSU,B.aR)
+y(A.aaj,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zj":{"a_":[]}}'))};
+(a=>{a["T4BZP0NvsMSq9P1eKa22rWIA0YE="]=a.current})($__dart_deferred_initializers__);