fix(auth): различать устаревшего бота и ненастроенного на экране логина

src/utils/api-error.test.ts

@@ -0,0 +1,59 @@
+import { AxiosError, AxiosHeaders } from 'axios';
+import { describe, expect, it } from 'vitest';
+import { getApiErrorMessage, isEndpointMissingError } from './api-error';
+
+function axiosErrorWithStatus(status: number, detail?: unknown): AxiosError {
+  const headers = new AxiosHeaders();
+  const config = { headers };
+  return new AxiosError(
+    'Request failed',
+    'ERR_BAD_REQUEST',
+    config,
+    {},
+    {
+      status,
+      statusText: '',
+      headers,
+      config,
+      data: detail === undefined ? {} : { detail },
+    },
+  );
+}
+
+describe('isEndpointMissingError', () => {
+  it('returns true for an axios 404', () => {
+    expect(isEndpointMissingError(axiosErrorWithStatus(404))).toBe(true);
+  });
+
+  it('returns false for other axios statuses', () => {
+    expect(isEndpointMissingError(axiosErrorWithStatus(403))).toBe(false);
+    expect(isEndpointMissingError(axiosErrorWithStatus(500))).toBe(false);
+  });
+
+  it('returns false for non-axios errors', () => {
+    expect(isEndpointMissingError(new Error('boom'))).toBe(false);
+    expect(isEndpointMissingError(undefined)).toBe(false);
+    expect(isEndpointMissingError(null)).toBe(false);
+  });
+});
+
+describe('getApiErrorMessage', () => {
+  it('returns string detail from an axios error', () => {
+    expect(getApiErrorMessage(axiosErrorWithStatus(400, 'Code must not be empty'), 'fb')).toBe(
+      'Code must not be empty',
+    );
+  });
+
+  it('joins pydantic validation errors', () => {
+    const err = axiosErrorWithStatus(422, [
+      { loc: ['body', 'name'], msg: 'field required' },
+      { loc: ['body', 'days'], msg: 'must be positive' },
+    ]);
+    expect(getApiErrorMessage(err, 'fb')).toBe('name: field required; days: must be positive');
+  });
+
+  it('falls back for non-axios errors and missing detail', () => {
+    expect(getApiErrorMessage(new Error('boom'), 'fb')).toBe('fb');
+    expect(getApiErrorMessage(axiosErrorWithStatus(500), 'fb')).toBe('fb');
+  });
+});

src/utils/api-error.ts

@@ -1,5 +1,15 @@
 import axios from 'axios';
 
+/**
+ * True when the backend answered 404 on the route itself — for cabinet
+ * endpoints that means the bot build is too old to have them (e.g. the
+ * deep-link auth routes exist only since bot v3.33.0), as opposed to a
+ * missing entity inside a handler.
+ */
+export function isEndpointMissingError(err: unknown): boolean {
+  return axios.isAxiosError(err) && err.response?.status === 404;
+}
+
 export function getApiErrorMessage(err: unknown, fallback: string): string {
   if (axios.isAxiosError(err)) {
     const detail = err.response?.data?.detail;