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_103.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={
-b4J(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.ZC(v,u)
+b4N(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.ZF(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnA(u)
+v.r=A.bnE(u)
 return u},
-bmg(d,e){var y
+bmk(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0c17\u0c02\u0c1f\u0c32\u0c41"
 break A}if("timePicker.minutes"===e){y="\u0c28\u0c3f\u0c2e\u0c3f\u0c37\u0c3e\u0c32\u0c41"
 break A}if("timePicker.seconds"===e){y="\u0c38\u0c46\u0c15\u0c28\u0c4d\u0c32\u0c41"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0c05\u0c28\u0c4d\u0c28\u0c40 \u0c0e\u0c02
 break A}if("keyboardToolbar.done"===e){y="\u0c2a\u0c42\u0c30\u0c4d\u0c24\u0c2f\u0c3f\u0c02\u0c26\u0c3f"
 break A}y=null
 break A}return y},
-bnA(d){return new A.aSs(d)},
-ZC:function ZC(d,e){var _=this
+bnE(d){return new A.aSw(d)},
+ZF:function ZF(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOZ:function aOZ(){},
-aSs:function aSs(d){this.a=d},
-aaD:function aaD(){}}
+aP0:function aP0(){},
+aSw:function aSw(d){this.a=d},
+aaF:function aaF(){}}
 B=c[0]
 A=a.updateHolder(c[73],A)
-A.ZC.prototype={
+A.ZF.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOZ()}return x},
+x=y.z=new A.aP0()}return x},
 gb9(){return this.r}}
-A.aOZ.prototype={
+A.aP0.prototype={
 gbh(){return"\u0c15\u0c24\u0c4d\u0c24\u0c3f\u0c30\u0c3f\u0c02\u0c1a\u0c41"},
 gbg(){return"\u0c15\u0c3e\u0c2a\u0c40 \u0c1a\u0c47\u0c2f\u0c3f"},
 gbi(){return"\u0c05\u0c24\u0c3f\u0c15\u0c3f\u0c02\u0c1a\u0c41"},
 gbe(){return"\u0c05\u0c28\u0c4d\u0c28\u0c40 \u0c0e\u0c02\u0c1a\u0c41\u0c15\u0c4b"}}
-A.aaD.prototype={}
+A.aaF.prototype={}
 var z=a.updateTypes([])
-A.aSs.prototype={
-$1(d){return A.bmg(this.a,d)},
+A.aSw.prototype={
+$1(d){return A.bmk(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aaD,B.a_)
-x(A.ZC,A.aaD)
-x(A.aOZ,B.aZ)
-x(A.aSs,B.aR)
-y(A.aaD,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"ZC":{"a_":[]}}'))};
-(a=>{a["gzDz2lrgwZEmogkWxSyQ/xbxBlk="]=a.current})($__dart_deferred_initializers__);
+x(A.aaF,B.a_)
+x(A.ZF,A.aaF)
+x(A.aP0,B.aZ)
+x(A.aSw,B.aR)
+y(A.aaF,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"ZF":{"a_":[]}}'))};
+(a=>{a["yFNJBhbJHP83hU5bZZz5Bym1DM0="]=a.current})($__dart_deferred_initializers__);