feat(bx): 报销可代选申请人，并放宽主数据选项的数据权限过滤

支持具备 changeApplicant 权限时代填申请人及发票/余额联动；系统/CRM/BX/PL 主数据与下拉选项改为仅租户隔离，避免「仅本人」导致空选项。

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/utils/http/bx.ts

@@ -93,6 +93,15 @@ bxAxios.interceptors.request.use(async (config: InternalAxiosRequestConfig) => {
   if (config.url) {
     config.url = normalizeBxUrl(config.url)
   }
+  if (config.data instanceof FormData) {
+    // 让浏览器自动带 multipart boundary；覆盖实例默认 application/json
+    if (typeof config.headers.set === 'function') {
+      config.headers.set('Content-Type', false as unknown as string)
+    } else {
+      delete (config.headers as any)['Content-Type']
+      delete (config.headers as any)['content-type']
+    }
+  }
   const store = useUserStore()
   let token = store.accessToken as unknown as string
   if (!token) {