fix: remove duplicate error messages in BOM manage page

Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-web/src/views/bom/BomManage.vue

@@ -250,7 +250,9 @@ const fetchBomList = async () => {
   try {
     const res = await getBomList({ keyword: searchKeyword.value })
     if (res.code === 200) bomList.value = res.data
-  } catch (error) { ElMessage.error('网络错误') }
+  } catch (error) {
+    // 错误已由全局拦截器统一处理
+  }
   finally { loading.value = false }
 }
 
@@ -258,7 +260,9 @@ const fetchMaterialOptions = async () => {
   try {
     const res = await getMaterialBaseList()
     if (res.code === 200) materialOptions.value = res.data
-  } catch (error) {}
+  } catch (error) {
+    // 错误已由全局拦截器统一处理
+  }
 }
 
 // 监听父件变化，自动设置前缀
@@ -321,7 +325,9 @@ const loadDetail = async (bomNo: string, version: string) => {
         form.bom_suffix = bomNo
       }
     }
-  } catch (e) { ElMessage.error('获取详情失败') }
+  } catch (e) {
+    // 错误已由全局拦截器统一处理
+  }
 }
 
 const handleDelete = (row: BomItem) => {
@@ -374,7 +380,9 @@ const submitForm = async () => {
         dialogVisible.value = false
         fetchBomList()
       } else { ElMessage.error(res.msg || '保存失败') }
-    } catch (e) { ElMessage.error('网络错误') }
+    } catch (e) {
+      // 错误已由全局拦截器统一处理
+    }
     finally { saving.value = false }
   })
 }