feat(import): 前端导入策略选择器 + 部分导入支持

- 新增导入策略单选：跳过重复行 / 覆盖更新
- 预览状态新增「将被更新」标签（橙色），区分「通过」「失败」
- 支持部分导入：有错误行时显示「忽略错误，仅导入正确的 N 条」按钮
- 预览时传递 mode 参数给后端
- 导入结果展示新增/更新/跳过数量

inventory-web/src/components/ImportDialog.vue

@@ -42,6 +42,22 @@
         </el-upload>
       </div>
 
+      <!-- ═══ 导入策略选择（仅基础信息） ═══ -->
+      <div v-if="importType === 'material'" class="import-strategy">
+        <el-divider />
+        <span class="step-label">3. 导入策略</span>
+        <el-radio-group v-model="importMode" class="strategy-group">
+          <el-radio value="skip">
+            <span class="strategy-label">跳过重复行</span>
+            <span class="strategy-desc">仅新增不重复的数据，已存在的直接跳过</span>
+          </el-radio>
+          <el-radio value="update">
+            <span class="strategy-label">覆盖更新</span>
+            <span class="strategy-desc">用 Excel 中的新数据覆盖更新数据库已有记录</span>
+          </el-radio>
+        </el-radio-group>
+      </div>
+
       <div v-if="previewLoading" class="preview-loading">
         <el-icon class="is-loading" style="font-size:20px"><Loading /></el-icon>
         <span style="margin-left:8px">正在解析和验证数据...</span>
@@ -60,11 +76,11 @@
 
       <el-table :data="previewRows" border stripe max-height="450" style="width:100%">
         <el-table-column type="index" label="#" width="50" align="center" />
-        <el-table-column label="状态" width="90" align="center">
+        <el-table-column label="状态" width="100" align="center">
           <template #default="{ row }">
-            <el-tag :type="row.status === 'success' ? 'success' : 'danger'" size="small">
-              {{ row.status === 'success' ? '通过' : '失败' }}
-            </el-tag>
+            <el-tag v-if="row.status === 'success'" type="success" size="small">通过</el-tag>
+            <el-tag v-else-if="row.status === 'update'" type="warning" size="small">将被更新</el-tag>
+            <el-tag v-else type="danger" size="small">失败</el-tag>
           </template>
         </el-table-column>
         <el-table-column label="错误信息" min-width="200" show-overflow-tooltip>
@@ -91,12 +107,24 @@
     <!-- ═══ Footer ═══ -->
     <template #footer>
       <el-button @click="handleClose" :disabled="executing">取消</el-button>
+
+      <!-- Step 1: 预览按钮 -->
       <el-button v-if="step === 1" type="primary" @click="handlePreview" :loading="previewLoading" :disabled="!fileReady">
         预览验证
       </el-button>
-      <el-button v-if="step === 2" type="primary" @click="handleExecute" :loading="executing" :disabled="errorCount > 0 || executing">
-        {{ executing ? '导入中...' : `确认导入 (${successCount} 条)` }}
+
+      <!-- Step 2: 全部通过/将被更新 → 直接导入 -->
+      <el-button v-if="step === 2 && errorCount === 0" type="primary" @click="handleExecute" :loading="executing">
+        {{ executing ? '导入中...' : `全部导入 (${importableCount} 条)` }}
       </el-button>
+
+      <!-- Step 2: 部分通过 → 允许跳过错误行导入 -->
+      <el-button v-else-if="step === 2 && importableCount > 0" type="warning" @click="handleExecute" :loading="executing">
+        {{ executing ? '导入中...' : `忽略错误，仅导入正确的 ${importableCount} 条` }}
+      </el-button>
+
+      <!-- Step 2: 全部失败 → 禁用 -->
+      <el-button v-else-if="step === 2" disabled>无可导入数据</el-button>
     </template>
   </el-dialog>
 </template>
@@ -138,12 +166,21 @@ const fileList = ref<any[]>([])
 const fileReady = ref(false)
 const rawFile = ref<File | null>(null)
 
+// ★ 新增：导入策略（仅 material 类型生效）
+const importMode = ref<'skip' | 'update'>('skip')
+
 const previewRows = ref<any[]>([])
 const successCount = computed(() => previewRows.value.filter(r => r.status === 'success').length)
+const updateCount = computed(() => previewRows.value.filter(r => r.status === 'update').length)
 const errorCount = computed(() => previewRows.value.filter(r => r.status === 'error').length)
-const previewSummary = computed(() =>
-  `共 ${previewRows.value.length} 条: ${successCount.value} 条通过, ${errorCount.value} 条失败`
-)
+const importableCount = computed(() => successCount.value + updateCount.value)
+const previewSummary = computed(() => {
+  const parts = [`共 ${previewRows.value.length} 条`]
+  if (successCount.value > 0) parts.push(`${successCount.value} 条通过`)
+  if (updateCount.value > 0) parts.push(`${updateCount.value} 条将被更新`)
+  if (errorCount.value > 0) parts.push(`${errorCount.value} 条失败`)
+  return parts.join('，')
+})
 
 // ═══ Preview Columns (depends on type) ═══
 const materialColumns = [
@@ -218,6 +255,7 @@ const handlePreview = async () => {
     const formData = new FormData()
     formData.append('file', rawFile.value)
     formData.append('type', props.importType)
+    formData.append('mode', importMode.value)  // ★ 预览时传递导入策略
 
     const res: any = await request({
       url: '/v1/import/preview',
@@ -240,7 +278,7 @@ const handlePreview = async () => {
 }
 
 const handleExecute = async () => {
-  if (errorCount.value > 0) return
+  if (importableCount.value === 0) return
   executing.value = true
   try {
     const res: any = await request({
@@ -248,12 +286,19 @@ const handleExecute = async () => {
       method: 'post',
       data: {
         type: props.importType,
-        rows: previewRows.value
+        rows: previewRows.value,
+        mode: importMode.value,
       }
     })
 
     if (res.code === 200) {
-      ElMessage.success(res.msg || '导入成功')
+      const detail = res.data || {}
+      // ★ 构建详细结果提示
+      const parts: string[] = []
+      if (detail.inserted > 0) parts.push(`新增 ${detail.inserted} 条`)
+      if (detail.updated > 0) parts.push(`更新 ${detail.updated} 条`)
+      if (detail.skipped > 0) parts.push(`跳过 ${detail.skipped} 条重复`)
+      ElMessage.success(parts.length > 0 ? parts.join('，') : (res.msg || '导入完成'))
       emit('success')
       handleClose()
     } else {
@@ -272,6 +317,7 @@ const handleClose = () => {
   rawFile.value = null
   fileReady.value = false
   previewRows.value = []
+  importMode.value = 'skip'
   visible.value = false
 }
 
@@ -283,6 +329,7 @@ watch(visible, (val) => {
     rawFile.value = null
     fileReady.value = false
     previewRows.value = []
+    importMode.value = 'skip'
   }
 })
 </script>
@@ -309,6 +356,38 @@ watch(visible, (val) => {
   color: #909399;
   font-size: 14px;
 }
+.import-strategy {
+  margin-top: 8px;
+}
+.strategy-group {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  margin-top: 8px;
+}
+.strategy-group .el-radio {
+  margin-right: 0;
+  height: auto;
+  padding: 10px 14px;
+  border: 1px solid #DCDFE6;
+  border-radius: 6px;
+  transition: border-color 0.2s;
+}
+.strategy-group .el-radio.is-checked {
+  border-color: #409EFF;
+  background: #ECF5FF;
+}
+.strategy-label {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+}
+.strategy-desc {
+  font-size: 12px;
+  color: #909399;
+  display: block;
+  margin-top: 2px;
+}
 :deep(.el-upload-dragger) {
   width: 100%;
 }