R-498: the app page's first steps name the household's address, not wiki.DOMAIN

AppInfo.WithAddress fills the catalog placeholder (<label>.DOMAIN -> the
effective subdomain + customer domain, bare DOMAIN -> the domain) on a
copy; appDetailHandler applies it. Pinned per catalog template (both
languages) and on the rendered page.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/app_update_switch_test.go

@@ -91,3 +91,24 @@ func TestAutoUpdateLine_PageSaysItOnce(t *testing.T) {
 		t.Error("the line must go once the app no longer runs what the automatic step installed")
 	}
 }
+
+// R-498: the app page's „Első lépések" shows the household's address, never the catalog's wiki.DOMAIN.
+func TestR498_AppPageFirstStepsShowTheRealAddress(t *testing.T) {
+	s, _ := credsHarness(t)
+	sd := filepath.Join(s.cfg.Paths.StacksDir, "crafty")
+	meta := "display_name: Crafty\nslug: crafty\nsubdomain: wiki\napp_info:\n  first_steps:\n    - 'Nyisd meg a wiki.DOMAIN címet a böngészőben'\n"
+	if err := os.WriteFile(filepath.Join(sd, ".felhom.yml"), []byte(meta), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	_ = s.stackMgr.ScanStacks()
+	s.loadTemplates()
+	rr := httptest.NewRecorder()
+	s.appDetailHandler(rr, httptest.NewRequest("GET", "/apps/crafty", nil), "crafty")
+	page := html.UnescapeString(rr.Body.String())
+	if !strings.Contains(page, "Nyisd meg a wiki.example.hu c") {
+		t.Fatalf("the first step must name the real address wiki.example.hu (status %d)", rr.Code)
+	}
+	if strings.Contains(page, "wiki.DOMAIN") {
+		t.Error("the literal wiki.DOMAIN reached the page")
+	}
+}