Add Luxsin curve API client and validation functionality

- Introduced a new module `curve_client.py` for interacting with the Luxsin curve API, including functions for custom Base64 decoding and parametric EQ validation.
- Implemented error handling for API responses and validation checks for curve data.
- Removed outdated test files to streamline the codebase.
- Updated brand creation and update logic in `brands.py` to ensure brand names are validated and checked for duplicates.
- Enhanced model handling in `models.py` with new validation and push-to-search functionality, integrating curve validation before pushing to Meilisearch.
- Updated frontend components to support new validation and push processes, including user feedback for validation results and progress tracking.
- Changed favicon to SVG format for better scalability and appearance.

frontend/src/utils/request.js

@@ -29,10 +29,14 @@ request.interceptors.response.use(
   response => {
     const res = response.data
     
-    // 如果响应码为 0，表示错误
+    // 如果响应码为 0，表示错误（可由调用方自行提示，如推送进度弹窗）
     if (res.code === 0) {
-      ElMessage.error(res.msg || '请求失败')
-      return Promise.reject(new Error(res.msg || '请求失败'))
+      if (!response.config.skipErrorToast) {
+        ElMessage.error(res.msg || '请求失败')
+      }
+      const err = new Error(res.msg || '请求失败')
+      err.responseData = res
+      return Promise.reject(err)
     }
     
     return res