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_84.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={
-b4r(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zk(v,u)
+b4v(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.Zn(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnT(u)
+v.r=A.bnX(u)
 return u},
-bmz(d,e){var y
+bmD(d,e){var y
 A:{if("timePicker.hours"===e){y="\u0918\u0923\u094d\u091f\u093e"
 break A}if("timePicker.minutes"===e){y="\u092e\u093f\u0928\u0947\u091f"
 break A}if("timePicker.seconds"===e){y="\u0938\u0947\u0915\u0947\u0928\u094d\u0921"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="\u0938\u092c\u0948 \u091a\u092f\u0928 \u091
 break A}if("keyboardToolbar.done"===e){y="\u0938\u092e\u094d\u092a\u0928\u094d\u0928"
 break A}y=null
 break A}return y},
-bnT(d){return new A.aSL(d)},
-Zk:function Zk(d,e){var _=this
+bnX(d){return new A.aSP(d)},
+Zn:function Zn(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOH:function aOH(){},
-aSL:function aSL(d){this.a=d},
-aal:function aal(){}}
+aOJ:function aOJ(){},
+aSP:function aSP(d){this.a=d},
+aan:function aan(){}}
 B=c[0]
 A=a.updateHolder(c[55],A)
-A.Zk.prototype={
+A.Zn.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOH()}return x},
+x=y.z=new A.aOJ()}return x},
 gb9(){return this.r}}
-A.aOH.prototype={
+A.aOJ.prototype={
 gbh(){return"\u0915\u093e\u091f\u094d\u0928\u0941\u0939\u094b\u0938\u094d"},
 gbg(){return"\u092a\u094d\u0930\u0924\u093f\u0932\u093f\u092a\u093f \u0917\u0930\u094d\u0928\u0941\u0939\u094b\u0938\u094d"},
 gbi(){return"\u091f\u093e\u0901\u0938\u094d\u0928\u0941\u0939\u094b\u0938\u094d"},
 gbe(){return"\u0938\u092c\u0948 \u091a\u092f\u0928 \u0917\u0930\u094d\u0928\u0941\u0939\u094b\u0938\u094d"}}
-A.aal.prototype={}
+A.aan.prototype={}
 var z=a.updateTypes([])
-A.aSL.prototype={
-$1(d){return A.bmz(this.a,d)},
+A.aSP.prototype={
+$1(d){return A.bmD(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aal,B.a_)
-x(A.Zk,A.aal)
-x(A.aOH,B.aZ)
-x(A.aSL,B.aR)
-y(A.aal,B.aX)})()
-B.b4(b.typeUniverse,JSON.parse('{"Zk":{"a_":[]}}'))};
-(a=>{a["JAkhQAkRdwNPv9/887pIp1NQP9k="]=a.current})($__dart_deferred_initializers__);
+x(A.aan,B.a_)
+x(A.Zn,A.aan)
+x(A.aOJ,B.aZ)
+x(A.aSP,B.aR)
+y(A.aan,B.aX)})()
+B.b3(b.typeUniverse,JSON.parse('{"Zn":{"a_":[]}}'))};
+(a=>{a["XSja0wsMzYAtDWENtC501QO980g="]=a.current})($__dart_deferred_initializers__);