feat: persist stocktake phase in local storage for smart resumption routing

inventory-web/src/views/stock/stocktake/index.vue

@@ -519,6 +519,8 @@ const startNewSession = async () => {
     scannedMap.value.clear()
     await loadData()
     isSessionActive.value = true
+    // ★ 标记当前阶段为 scanning（扫码中）
+    localStorage.setItem('stocktake_phase', 'scanning')
     ElMessage.success('新盘点会话已开始')
   } catch (e: any) {
     if (e !== 'cancel') {
@@ -558,10 +560,18 @@ const resumeSession = async () => {
     
     // 加载完整库存数据
     await loadData()
-    
-    // ★ 恢复扫码作业
-    isSessionActive.value = true
-    ElMessage.success('已恢复扫码，继续盘点')
+
+    // ★ 智能路由：根据本地记忆的阶段决定下一步
+    const phase = localStorage.getItem('stocktake_phase')
+    if (phase === 'review') {
+      // 如果记忆中已经是核对阶段，直接打开差异弹窗
+      await openVarianceDialog()
+      ElMessage.info('已恢复差异审核')
+    } else {
+      // 默认打开扫码镜头
+      isSessionActive.value = true
+      ElMessage.success('已恢复扫码，继续盘点')
+    }
   } catch (e) {
     ElMessage.error('恢复失败')
   } finally { btnLoading.value = false }
@@ -577,6 +587,8 @@ const pauseSession = () => {
 const returnToScan = () => {
   showVarianceDialog.value = false
   isSessionActive.value = true
+  // ★ 标记当前阶段为 scanning（扫码中）
+  localStorage.setItem('stocktake_phase', 'scanning')
   ElMessage.info('继续扫码，发现漏扫的物料')
 }
 
@@ -884,6 +896,9 @@ const finishStocktake = async () => {
     ElMessage.success('盘点扫描结束，请核对差异')
     await openVarianceDialog() // 自动弹出差异审核列表
     
+    // ★ 标记当前阶段为 review（差异审核）
+    localStorage.setItem('stocktake_phase', 'review')
+    
   } catch (e: any) {
     if (e === 'cancel' || e === 'close' || String(e).includes('cancel')) {
       // 用户取消，停留在扫码界面继续盘点