refactor: replace direct Paperless upload with client-side document download functionality

paperless-frontend/src/api/inbox.ts

@@ -107,17 +107,8 @@ export const inboxApi = {
       )
       .then((r) => r.data),
 
-  saveToPaperless: (
-    id: string,
-    body: {
-      title: string;
-      date?: string;
-      documentTypeId?: number;
-      correspondentId?: number;
-      tagIds?: number[];
-    },
-  ) =>
-    api.post(`/api/inbox/${encodeURIComponent(id)}/save-to-paperless`, body).then(() => {}),
+  downloadBlob: (id: string) =>
+    api.get<Blob>(`/api/inbox/${encodeURIComponent(id)}/download`, { responseType: 'blob' }).then((r) => r.data),
 
   sendEmail: (
     id: string,