feat: add download button to Tables/Images views, add task history delete/clear-all

web/backend/routers/tasks.py

@@ -112,6 +112,29 @@ async def get_task(
     return task
 
 
+@router.delete("/{task_id}")
+async def delete_task(
+    task_id: str,
+    current_user: dict = Depends(get_current_user),
+):
+    """Delete a single task by ID."""
+    loop = asyncio.get_event_loop()
+    deleted = await loop.run_in_executor(None, lambda: db_schema.delete_task(task_id))
+    if not deleted:
+        raise HTTPException(status_code=404, detail="任务不存在")
+    return {"message": "已删除"}
+
+
+@router.delete("")
+async def clear_all_tasks(
+    current_user: dict = Depends(get_current_user),
+):
+    """Clear all task history records."""
+    loop = asyncio.get_event_loop()
+    count = await loop.run_in_executor(None, db_schema.clear_task_history)
+    return {"message": f"已清除 {count} 条记录", "count": count}
+
+
 @router.post("/{task_id}/retry")
 async def retry_task(
     task_id: str,

web/backend/services/db_schema.py

@@ -333,6 +333,28 @@ def query_task_stats() -> dict:
         conn.close()
 
 
+def delete_task(task_id: str) -> bool:
+    """Delete a single task by ID. Returns True if deleted."""
+    conn = sqlite3.connect(_db_path)
+    try:
+        cur = conn.execute("DELETE FROM task_history WHERE id = ?", (task_id,))
+        conn.commit()
+        return cur.rowcount > 0
+    finally:
+        conn.close()
+
+
+def clear_task_history() -> int:
+    """Delete all task history records. Returns number of deleted rows."""
+    conn = sqlite3.connect(_db_path)
+    try:
+        cur = conn.execute("DELETE FROM task_history")
+        conn.commit()
+        return cur.rowcount
+    finally:
+        conn.close()
+
+
 # ---------------------------------------------------------------------------
 # Query functions — File metadata
 # ---------------------------------------------------------------------------

web/frontend/src/views/Tasks.vue

@@ -62,6 +62,7 @@
             <template #prefix><el-icon><Search /></el-icon></template>
           </el-input>
           <el-button size="small" @click="loadData" :icon="Refresh">刷新</el-button>
+          <el-button size="small" type="danger" @click="clearAllTasks">清除全部</el-button>
         </div>
       </div>
 
@@ -88,10 +89,11 @@
             <span class="time-cell">{{ formatTime(row.created_at) }}</span>
           </template>
         </el-table-column>
-        <el-table-column label="操作" width="140" fixed="right">
+        <el-table-column label="操作" width="180" fixed="right">
           <template #default="{ row }">
             <el-button type="primary" link size="small" @click="showDetail(row)">详情</el-button>
             <el-button v-if="row.status === 'failed'" type="warning" link size="small" @click="retryTask(row)">重试</el-button>
+            <el-button type="danger" link size="small" @click="deleteTask(row)">删除</el-button>
           </template>
         </el-table-column>
       </el-table>
@@ -137,7 +139,7 @@
 
 <script setup lang="ts">
 import { ref, reactive, onMounted, onUnmounted } from 'vue'
-import { ElMessage } from 'element-plus'
+import { ElMessage, ElMessageBox } from 'element-plus'
 import { Timer, CircleCheck, CircleClose, Loading, Search, Refresh } from '@element-plus/icons-vue'
 import api from '../api'
 import { useDebounce } from '../composables/useDebounce'
@@ -214,6 +216,30 @@ async function copyPath(text: string) {
   }
 }
 
+async function deleteTask(row: any) {
+  try {
+    await ElMessageBox.confirm(`确定删除任务 #${row.id}？`, '确认删除')
+    await api.delete(`/tasks/${row.id}`)
+    ElMessage.success('已删除')
+    loadData()
+    loadStats()
+  } catch (err: any) {
+    if (err !== 'cancel') ElMessage.error(err.response?.data?.detail || '删除失败')
+  }
+}
+
+async function clearAllTasks() {
+  try {
+    await ElMessageBox.confirm('确定清除所有任务历史记录？此操作不可撤销。', '确认清除', { type: 'warning' })
+    await api.delete('/tasks')
+    ElMessage.success('已清除所有任务历史')
+    loadData()
+    loadStats()
+  } catch (err: any) {
+    if (err !== 'cancel') ElMessage.error(err.response?.data?.detail || '清除失败')
+  }
+}
+
 async function retryTask(row: any) {
   try {
     await api.post(`/tasks/${row.id}/retry`)

web/frontend/src/views/files/Images.vue

@@ -81,10 +81,11 @@
           <span class="time-text">{{ fmtTime(row.created_at) }}</span>
         </template>
       </el-table-column>
-      <el-table-column label="操作" width="320" fixed="right">
+      <el-table-column label="操作" width="370" fixed="right">
         <template #default="{ row }">
           <el-button link type="primary" size="small" @click="previewFile(row)">预览</el-button>
           <el-button link type="primary" size="small" @click="showDetail(row)">详情</el-button>
+          <el-button link type="primary" size="small" @click="downloadFile(row)">下载</el-button>
           <el-button link type="primary" size="small" @click="pipelineFile(row)">生成采购单</el-button>
           <el-button link type="primary" size="small" @click="ocrFile(row)">仅OCR</el-button>
           <el-button link type="danger" size="small" @click="deleteFile(row)">删除</el-button>

web/frontend/src/views/files/Tables.vue

@@ -78,10 +78,11 @@
           <span class="time-text">{{ fmtTime(row.created_at) }}</span>
         </template>
       </el-table-column>
-      <el-table-column label="操作" width="280" fixed="right">
+      <el-table-column label="操作" width="320" fixed="right">
         <template #default="{ row }">
           <el-button link type="primary" size="small" @click="previewFile(row)">预览</el-button>
           <el-button link type="primary" size="small" @click="showDetail(row)">详情</el-button>
+          <el-button link type="primary" size="small" @click="downloadFile(row)">下载</el-button>
           <el-button link type="primary" size="small" @click="processFile(row)">处理</el-button>
           <el-button link type="danger" size="small" @click="deleteFile(row)">删除</el-button>
         </template>
@@ -210,6 +211,15 @@ async function processFile(row: any) {
   }
 }
 
+async function downloadFile(row: any) {
+  const token = localStorage.getItem('token')
+  if (row.output_excel) {
+    window.open(`/api/files/download/output/${encodeURIComponent(row.output_excel)}?token=${token}`, '_blank')
+  } else if (row.result_purchase) {
+    window.open(`/api/files/download/result/${encodeURIComponent(row.result_purchase)}?token=${token}`, '_blank')
+  }
+}
+
 async function deleteFile(row: any) {
   try {
     await ElMessageBox.confirm(`确定删除 ${row.output_excel}？`, '确认')