feat: auto-sync file list + clear processing cache

- Auto-sync file_relations on every query (files appear immediately)
- Add POST /api/files/reset-cache endpoint to delete output/result
  files and reset status to pending for reprocessing
- Add "清除处理缓存" button to all 3 file views

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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

@@ -19,6 +19,9 @@
         <el-button type="danger" :disabled="!selected.length" @click="batchDelete">
           批量删除
         </el-button>
+        <el-button :disabled="!selected.length" @click="resetCache">
+          清除处理缓存
+        </el-button>
         <input
           ref="uploadInput"
           type="file"
@@ -287,6 +290,22 @@ async function batchDelete() {
   }
 }
 
+async function resetCache() {
+  try {
+    await ElMessageBox.confirm(`确定清除选中的 ${selected.value.length} 个文件的处理缓存？删除后可重新处理。`, '确认')
+    const files = selected.value.map(r => ({
+      input_image: r.input_image,
+      output_excel: r.output_excel,
+      result_purchase: r.result_purchase,
+    }))
+    const res = await api.post('/files/reset-cache', { files })
+    ElMessage.success(`已清除 ${res.data.deleted_files} 个缓存文件`)
+    loadData()
+  } catch (err: any) {
+    if (err !== 'cancel') ElMessage.error('清除缓存失败')
+  }
+}
+
 onMounted(loadData)
 </script>
 

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

@@ -15,6 +15,9 @@
         <el-button type="danger" :disabled="!selected.length" @click="batchDelete">
           批量删除
         </el-button>
+        <el-button :disabled="!selected.length" @click="resetCache">
+          清除处理缓存
+        </el-button>
       </div>
     </div>
 
@@ -238,6 +241,22 @@ async function batchDelete() {
   }
 }
 
+async function resetCache() {
+  try {
+    await ElMessageBox.confirm(`确定清除选中的 ${selected.value.length} 个文件的处理缓存？删除后可重新处理。`, '确认')
+    const files = selected.value.map(r => ({
+      input_image: r.input_image,
+      output_excel: r.output_excel,
+      result_purchase: r.result_purchase,
+    }))
+    const res = await api.post('/files/reset-cache', { files })
+    ElMessage.success(`已清除 ${res.data.deleted_files} 个缓存文件`)
+    loadData()
+  } catch (err: any) {
+    if (err !== 'cancel') ElMessage.error('清除缓存失败')
+  }
+}
+
 onMounted(loadData)
 </script>
 

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

@@ -13,6 +13,9 @@
         <el-button :disabled="!selected.length" @click="batchDelete">
           批量删除
         </el-button>
+        <el-button :disabled="!selected.length" @click="resetCache">
+          清除处理缓存
+        </el-button>
         <el-button type="danger" @click="clearAll">
           删除全部
         </el-button>
@@ -246,6 +249,22 @@ async function batchDelete() {
   }
 }
 
+async function resetCache() {
+  try {
+    await ElMessageBox.confirm(`确定清除选中的 ${selected.value.length} 个文件的处理缓存？删除后可重新处理。`, '确认')
+    const files = selected.value.map(r => ({
+      input_image: r.input_image,
+      output_excel: r.output_excel,
+      result_purchase: r.result_purchase,
+    }))
+    const res = await api.post('/files/reset-cache', { files })
+    ElMessage.success(`已清除 ${res.data.deleted_files} 个缓存文件`)
+    loadData()
+  } catch (err: any) {
+    if (err !== 'cancel') ElMessage.error('清除缓存失败')
+  }
+}
+
 async function clearAll() {
   try {
     await ElMessageBox.confirm('确定清空所有 Excel 处理文件？此操作不可恢复。', '确认')