fix(auth): send Referer on the Google Maps key validation request (#1862)

The admin panel's test button reported a key with an HTTP referrer restriction as invalid, because the validation call was the one Google request that did not send a Referer. It sends the same header googleFetch already sets for every real request.

server/src/nest/auth/user-profile.service.ts

@@ -1,6 +1,7 @@
 import { Injectable } from '@nestjs/common';
 import path from 'path';
 import fs from 'fs';
+import { readEnv, getAppUrl } from '../../app-config';
 import { DatabaseService } from '../database/database.service';
 import { decrypt_api_key, maybe_encrypt_api_key } from '../common/crypto/apiKeyCrypto';
 import { avatarUrl } from '../common/avatarUrl';
@@ -201,11 +202,15 @@ export class UserProfileService {
     const maps_api_key = decrypt_api_key(user.maps_api_key);
     if (maps_api_key) {
       try {
+        // Same Referer as maps.service googleFetch — without it, keys with an
+        // HTTP-referrer restriction fail validation while real requests succeed.
+        const referer = readEnv().app.appUrl ? getAppUrl() : undefined;
         const mapsRes = await fetch(
           `https://places.googleapis.com/v1/places:searchText`,
           {
             method: 'POST',
             headers: {
+              ...(referer ? { Referer: referer } : {}),
               'Content-Type': 'application/json',
               'X-Goog-Api-Key': maps_api_key,
               'X-Goog-FieldMask': 'places.displayName',

server/tests/unit/nest/user-profile.service.test.ts

@@ -232,6 +232,27 @@ describe('validateKeys', () => {
 
     fetchSpy.mockRestore();
   });
+
+  it('AUTH-DB-098: sends Referer from APP_URL so referrer-restricted keys validate like real requests', async () => {
+    const { user } = createAdmin(testDb);
+    testDb.prepare('UPDATE users SET maps_api_key = ? WHERE id = ?').run('test-key', user.id);
+
+    const prevAppUrl = process.env.APP_URL;
+    process.env.APP_URL = 'https://trek.example.com';
+    const fetchSpy = vi.spyOn(global, 'fetch').mockResolvedValueOnce({
+      status: 200,
+      statusText: 'OK',
+      text: async () => '',
+    } as Response);
+
+    await profile.validateKeys(user.id);
+    const headers = (fetchSpy.mock.calls[0]?.[1]?.headers ?? {}) as Record<string, string>;
+    expect(headers.Referer).toBe('https://trek.example.com');
+
+    fetchSpy.mockRestore();
+    if (prevAppUrl === undefined) delete process.env.APP_URL;
+    else process.env.APP_URL = prevAppUrl;
+  });
 });
 
 describe('updateMapsKey / avatar', () => {