继续沉淀结果页返回按钮

新增共享 PlatformBackActionButton 承接结果页轻量返回入口
将拼图方洞拼消消视觉小说等结果页返回按钮收口到共享组件
将拼消消跳一跳敲木鱼宝贝识物结果页返回按钮收口到共享组件
补充对应测试并更新 PlatformUiKit 收口计划与共享决策记录

src/components/puzzle-clear-result/PuzzleClearResultView.tsx

@@ -1,4 +1,4 @@
-import { ArrowLeft, Loader2, Play, RefreshCcw, Send } from 'lucide-react';
+import { Loader2, Play, RefreshCcw, Send } from 'lucide-react';
 import { useState } from 'react';
 
 import type {
@@ -6,6 +6,7 @@ import type {
   PuzzleClearWorkProfileResponse,
 } from '../../../packages/shared/src/contracts/puzzleClear';
 import { PlatformActionButton } from '../common/PlatformActionButton';
+import { PlatformBackActionButton } from '../common/PlatformBackActionButton';
 import { PlatformMediaFrame } from '../common/PlatformMediaFrame';
 import { PlatformMediaTileGrid } from '../common/PlatformMediaTileGrid';
 import { PlatformStatGrid } from '../common/PlatformStatGrid';
@@ -74,15 +75,10 @@ export function PuzzleClearResultView({
   return (
     <div className="platform-remap-surface mx-auto flex h-full min-h-0 w-full max-w-6xl flex-col px-3 pb-3 pt-3 sm:px-4 sm:pt-4">
       <div className="mb-3 flex items-center justify-between gap-3">
-        <PlatformActionButton
+        <PlatformBackActionButton
           onClick={onBack}
-          tone="ghost"
-          size="xs"
-          className="min-h-0 gap-2 py-2 text-sm"
-        >
-          <ArrowLeft className="h-4 w-4" />
-          返回
-        </PlatformActionButton>
+          variant="regular"
+        />
         <PlatformActionButton
           onClick={onRegenerateAtlas}
           disabled={isBusy}