v0.270.0: no update for a current app (R-679); an interrupted install is reported (R-681); a restore brings back the pinned version's health check (R-669); R-674

Five red-proofs. MinAgent 0.131.0 unchanged.

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

controller/internal/web/r681_install_interrupted_page_test.go

@@ -0,0 +1,33 @@
+package web
+
+import (
+	"strings"
+	"testing"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
+)
+
+// R-681 (v0.270.0) on the page: an app whose install a restart cut off says so, in both languages, beside
+// its Install button — and an ordinary not-installed app shows nothing (negative control).
+//
+// COMPANION RED-PROOF (REPORT.md): drop the {{if .InstallInterrupted}} line from stacks.html → "the apps
+// page is silent about an interrupted install".
+func TestR681_PageSaysTheInstallWasInterrupted(t *testing.T) {
+	st := ubStack(nil, map[string]string{"web": "nginx:1.27"}, "2026-07-18")
+	st.Name = "n8n"
+	st.Deployed = false
+	st.State = stacks.StateNotDeployed
+	st.InstallInterrupted = true
+	hu := renderBackupPageLang(t, "hu", "stacks", ubStacksData(st))
+	en := renderBackupPageLang(t, "en", "stacks", ubStacksData(st))
+	if !strings.Contains(hu, `data-install-interrupted="true"`) || !strings.Contains(hu, "lbemaradt") {
+		t.Fatal("the apps page is silent about an interrupted install (hu)")
+	}
+	if !strings.Contains(en, `data-install-interrupted="true"`) || !strings.Contains(en, "interrupted by a restart") {
+		t.Fatal("the apps page is silent about an interrupted install (en)")
+	}
+	st.InstallInterrupted = false
+	if h := renderBackupPageLang(t, "hu", "stacks", ubStacksData(st)); strings.Contains(h, `data-install-interrupted`) || strings.Contains(h, "lbemaradt") {
+		t.Fatal("an ordinary not-installed app must not carry the sentence")
+	}
+}