feat: 为划转页面账户卡片添加位置互换动画

- 移除按钮旋转动画，保持按钮静止
- 两个账户卡片（从/到）平滑互换位置
- 使用 AnimatedSwitcher + FadeTransition + SlideTransition
- 动画时长 300ms，easeOut 曲线
- 上方卡片向上滑出，下方卡片向下滑入
- 视觉效果更流畅自然

flutter_monisuo/build/web/main.dart.js_100.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={
-b4x(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
-u=new A.Zw(v,u)
+b4H(d,e,f){var y,x,w=null,v=new B.a0(),u=new B.a0()
+u=new A.ZA(v,u)
 u.bf(d,w,e,w)
 y=u.a
 x=v.r
 x.toString
 y.r=x
-v.r=A.bnp(u)
+v.r=A.bnC(u)
 return u},
-bm5(d,e){var y
+bmi(d,e){var y
 A:{if("timePicker.hours"===e){y="Masaa"
 break A}if("timePicker.minutes"===e){y="Dakika"
 break A}if("timePicker.seconds"===e){y="Sekunde"
@@ -23,38 +23,38 @@ break A}if("input.selectAll"===e){y="Chagua yote"
 break A}if("keyboardToolbar.done"===e){y="Imekamilika"
 break A}y=null
 break A}return y},
-bnp(d){return new A.aSm(d)},
-Zw:function Zw(d,e){var _=this
+bnC(d){return new A.aSu(d)},
+ZA:function ZA(d,e){var _=this
 _.r=d
 _.z=_.w=$
 _.a=e
 _.e=_.b=$},
-aOR:function aOR(){},
-aSm:function aSm(d){this.a=d},
-aax:function aax(){}}
+aOX:function aOX(){},
+aSu:function aSu(d){this.a=d},
+aaB:function aaB(){}}
 B=c[0]
 A=a.updateHolder(c[71],A)
-A.Zw.prototype={
+A.ZA.prototype={
 h(d,e){var y=this.r.a4(e)
 return y==null?this.a.a4(e):y},
 gb4(){var y=this,x=y.z
 if(x===$){if(y.w===$)y.w=y
-x=y.z=new A.aOR()}return x},
+x=y.z=new A.aOX()}return x},
 gb9(){return this.r}}
-A.aOR.prototype={
+A.aOX.prototype={
 gbh(){return"Kata"},
 gbg(){return"Nakili"},
 gbi(){return"Bandika"},
 gbe(){return"Chagua yote"}}
-A.aax.prototype={}
+A.aaB.prototype={}
 var z=a.updateTypes([])
-A.aSm.prototype={
-$1(d){return A.bm5(this.a,d)},
+A.aSu.prototype={
+$1(d){return A.bmi(this.a,d)},
 $S:2};(function inheritance(){var y=a.mixin,x=a.inherit
-x(A.aax,B.a_)
-x(A.Zw,A.aax)
-x(A.aOR,B.aZ)
-x(A.aSm,B.aR)
-y(A.aax,B.aX)})()
-B.b3(b.typeUniverse,JSON.parse('{"Zw":{"a_":[]}}'))};
-(a=>{a["FBIoSeFQC889iqWdlp8n2uvxLLU="]=a.current})($__dart_deferred_initializers__);
+x(A.aaB,B.a_)
+x(A.ZA,A.aaB)
+x(A.aOX,B.aZ)
+x(A.aSu,B.aR)
+y(A.aaB,B.aX)})()
+B.b4(b.typeUniverse,JSON.parse('{"ZA":{"a_":[]}}'))};
+(a=>{a["w0IWjnBfFrvddsCJ2K+ikw9RFGc="]=a.current})($__dart_deferred_initializers__);