Add OTA package upload functionality and UI enhancements

- Introduced a new endpoint for uploading OTA packages in backend/routes/ota.py.
- Implemented file handling and MD5 checksum calculation for OTA packages.
- Updated frontend API to support OTA package uploads with a new uploadOtaPackage function.
- Enhanced the OTA management UI to include file upload options and improved layout.
- Updated requirements.txt to include boto3 for S3 interactions.
- Made various UI adjustments for better user experience and consistency.

frontend/src/api/ota.js

@@ -47,3 +47,21 @@ export function deleteOta(id) {
     method: 'delete'
   })
 }
+
+/**
+ * 上传 OTA 升级包（Luxsin-X9）
+ * @param {File} file
+ * @param {string} model 设备型号
+ */
+export function uploadOtaPackage(file, model) {
+  const formData = new FormData()
+  formData.append('package_file', file)
+  formData.append('model', model)
+  return request({
+    url: '/ota/upload-package',
+    method: 'post',
+    data: formData,
+    headers: { 'Content-Type': 'multipart/form-data' },
+    timeout: 300000
+  })
+}