fix: use public Pi-hole version discovery (#7032)

apps/docs/docs/integrations/pi-hole/index.mdx

@@ -15,7 +15,8 @@ import { piHoleIntegration } from ".";
 <IntegrationHeader integration={piHoleIntegration} categories={["DNS Hole"]} />
 
 <Alert type="note" className="my-2">
-  Homarr supports both Pi-hole v5 and v6. It automatically detects the version and uses the correct API.
+  Homarr supports both Pi-hole v5 and v6. It automatically detects the version and uses the correct API. If your reverse
+  proxy restricts API paths, allow the public `/api/info/login` endpoint used to detect Pi-hole v6.
 </Alert>
 
 ### Widgets & Capabilities

packages/integrations/src/pi-hole/pi-hole-integration-factory.ts

@@ -8,13 +8,13 @@ import { PiHoleIntegrationV6 } from "./v6/pi-hole-integration-v6";
 export const createPiHoleIntegrationAsync = async (input: IntegrationInput) => {
   try {
     const baseUrl = removeTrailingSlash(input.url);
-    const url = new URL(`${baseUrl}/api/info/version`);
+    const url = new URL(`${baseUrl}/api/info/login`);
     const response = await fetchWithTrustedCertificatesAsync(url);
 
     /**
      * In pi-hole 5 the api was at /admin/api.php, in pi-hole 6 it was moved to /api
-     * For the /api/info/version endpoint, the response is 404 in pi-hole 5
-     * and 401 in pi-hole 6
+     * The public /api/info/login endpoint returns 404 in pi-hole 5
+     * and 200 in pi-hole 6, without requiring an authenticated session.
      */
     if (response.status === 404) {
       return new PiHoleIntegrationV5(input);