feat: refine operations UI and transport limits

api/src/http-body-limits.ts

@@ -0,0 +1,25 @@
+import type { NestExpressApplication } from '@nestjs/platform-express';
+
+const express = require('express') as {
+  json(options: {
+    limit: string;
+    verify(request: { rawBody?: Buffer }, response: unknown, buffer: Buffer): void;
+  }): (...args: unknown[]) => unknown;
+};
+
+export const DEFAULT_JSON_BODY_LIMIT = '2mb';
+export const IMPORT_JSON_BODY_LIMIT = '25mb';
+
+export function configureHttpBodyParsers(app: NestExpressApplication) {
+  // Import preview/confirmation temporarily carries the source CSV/TSV in
+  // JSON. Give only these endpoints the larger boundary; keeping ordinary
+  // JSON at 2 MiB limits the duplicate raw-buffer + parsed-object footprint.
+  app.use('/api/client/send/imports', express.json({
+    limit: IMPORT_JSON_BODY_LIMIT,
+    verify(request, _response, buffer) {
+      request.rawBody = buffer;
+    },
+  }));
+  app.useBodyParser('json', { limit: DEFAULT_JSON_BODY_LIMIT });
+  app.useBodyParser('urlencoded', { limit: DEFAULT_JSON_BODY_LIMIT, extended: true });
+}