diff --git a/CHANGELOG.md b/CHANGELOG.md
index 654430f..b5a1444 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,25 @@
+## v0.238.0 — the page follows the update, and a held app offers no way to start it (2026-09-13, update arc slice 4 Part 4)
+
+**MinAgent: 0.129.0** (unchanged)
+
+**No behaviour change on the box — the surface only.** v0.237.0 made the update a job; this release
+makes the page show it.
+
+- **Pressing `Frissítés` follows the job.** The button text becomes the phase label —
+  `Ellenőrzés…`, `Biztonsági mentés készül a frissítés előtt…`, `Adatbázis pillanatkép…`,
+  `Új verzió letöltése…`, `Indítás az új verzióval…`, `Működés ellenőrzése…` — polling
+  `GET /api/stacks/{name}` every 3 s, and the page reloads when `updating` goes false. It no longer
+  reloads the instant the request returns.
+- **An updating card offers no lifecycle button** and shows the phase as a progress tag.
+- **A held card** (failed update OR failed restore) shows the hold sentence and a `Mentések` link, and
+  offers nothing that would start or update the app — `Eltávolítás` stays.
+- **A failed update that held nothing** (backup failed, pull failed, precondition vanished) shows its
+  sentence above the buttons.
+- **The updating and held checks come BEFORE `isOperational`.** That predicate counts `restarting` as
+  operational, which is how the 2026-09-01 spike saw a green `Frissítés` beside a crash loop. Pinned
+  with fixtures in `StateRestarting`; red-proofed by moving the checks after it (both tests fail).
+- The app info page shows the same three notices under its header. **No new CSS**, no version number.
+
 ## v0.237.0 — the Update button takes a backup first, and tells the truth (2026-09-13, update arc slice 4 — R-448, R-443, R-439)
 
 **MinAgent: 0.129.0** (unchanged)
diff --git a/controller/README.md b/controller/README.md
index 4a66198..41abef3 100644
--- a/controller/README.md
+++ b/controller/README.md
@@ -596,6 +596,11 @@ the boot sweep) puts a pin back or marks an interrupted update for `ResumeInterr
 since v0.237.0 the drive-return gate and the nightly volume dump. The nightly capture and Tier-2 run
 skip a held app so its restore point is not overwritten.
 
+**The page (v0.238.0).** `Frissítés` follows the job — the button shows the phase label and the page
+reloads when the update ends. An updating card offers no lifecycle button; a held card shows the hold
+sentence with a `Mentések` link and nothing that would start it; a failed update that held nothing
+shows its sentence. These checks run BEFORE `isOperational`, which counts `restarting` as operational.
+
 **Not done, deliberately:** the old version is never put back automatically — whether that works is
 per-app and was measured unpredictable. Reasoning: `felhom.eu/documentation/architecture/09-update-architecture.md` §6.
 
diff --git a/controller/internal/web/slice4_page_test.go b/controller/internal/web/slice4_page_test.go
new file mode 100644
index 0000000..4dfc9ea
--- /dev/null
+++ b/controller/internal/web/slice4_page_test.go
@@ -0,0 +1,70 @@
+package web
+
+import (
+	"strings"
+	"testing"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
+)
+
+// Slice 4 Part 4 — the card while an update runs, while an app is held, and after an update that
+// failed without a hold. Rendered through the REAL stacks template.
+//
+// THE TRAP THESE PIN: isOperationalState counts `restarting` as operational — that is how the
+// 2026-09-01 spike saw a green Frissítés beside a crash loop. Both fixtures below are in
+// StateRestarting on purpose, so a template that checked isOperational FIRST would render all three
+// lifecycle buttons and fail here.
+//
+// COMPANION RED-PROOF (REPORT.md): move the `{{if .Updating}}…{{else if .HoldReason}}` branches below
+// `isOperational` in stacks.html — the held and updating tests fail with the buttons present.
+
+var slice4LifecycleButtons = []string{
+	`stackAction(event, 'bookstack', 'update')`,
+	`stackAction(event, 'bookstack', 'restart')`,
+	`stackAction(event, 'bookstack', 'stop')`,
+	`stackAction(event, 'bookstack', 'start')`,
+}
+
+func TestSlice4_Page_UpdatingCardShowsThePhaseAndNoLifecycleButton(t *testing.T) {
+	st := ubStack(nil, map[string]string{"web": "nginx:1.27"}, "2026-07-18")
+	st.State = stacks.StateRestarting
+	st.Updating, st.UpdatePhase, st.UpdatePhaseLabel = true, stacks.UpdatePhasePulling, stacks.UpdatePhaseLabel(stacks.UpdatePhasePulling)
+	h := renderBackupPage(t, "stacks", ubStacksData(st))
+	if !strings.Contains(h, `data-update-phase="pulling"`) || !strings.Contains(h, stacks.UpdatePhaseLabel(stacks.UpdatePhasePulling)) {
+		t.Error("an updating card must show its phase label")
+	}
+	for _, b := range slice4LifecycleButtons {
+		if strings.Contains(h, b) {
+			t.Errorf("an updating card must offer no lifecycle button, found %q", b)
+		}
+	}
+}
+
+func TestSlice4_Page_HeldCardShowsTheHoldAndTheWayBack(t *testing.T) {
+	st := ubStack(nil, map[string]string{"web": "nginx:1.27"}, "2026-07-18")
+	st.State = stacks.StateRestarting
+	st.HoldReason = "A(z) bookstack frissítése 2026-09-13 10:00-kor nem sikerült — HOLD"
+	h := renderBackupPage(t, "stacks", ubStacksData(st))
+	if !strings.Contains(h, `data-held="true"`) || !strings.Contains(h, "HOLD") || !strings.Contains(h, `href="/backups/apps"`) {
+		t.Error("a held card must show the hold sentence and link Mentések")
+	}
+	for _, b := range slice4LifecycleButtons {
+		if strings.Contains(h, b) {
+			t.Errorf("a held card must offer nothing that starts or updates it, found %q", b)
+		}
+	}
+}
+
+func TestSlice4_Page_FailedUpdateWithoutHoldKeepsTheButtonsAndSaysWhy(t *testing.T) {
+	st := ubStack(nil, map[string]string{"web": "nginx:1.27"}, "2026-07-18")
+	st.UpdateError = stacks.MsgUpdatePullFailed
+	h := renderBackupPage(t, "stacks", ubStacksData(st))
+	if !strings.Contains(h, `data-update-error="true"`) || !strings.Contains(h, stacks.MsgUpdatePullFailed) {
+		t.Error("a failed update that held nothing must still say what happened")
+	}
+	for _, b := range slice4LifecycleButtons[:3] {
+		if !strings.Contains(h, b) {
+			t.Errorf("positive control: a running, unheld app keeps %q", b)
+		}
+	}
+}
diff --git a/controller/internal/web/templates/app_info.html b/controller/internal/web/templates/app_info.html
index d9772c2..f94edfb 100644
--- a/controller/internal/web/templates/app_info.html
+++ b/controller/internal/web/templates/app_info.html
@@ -28,6 +28,14 @@
     </div>
 </div>
 
+{{if .Stack.Updating}}
+<div class="alert alert-info" style="margin-top:1rem" data-update-phase="{{.Stack.UpdatePhase}}">{{.Stack.UpdatePhaseLabel}}</div>
+{{else if .Stack.HoldReason}}
+<div class="alert alert-error" style="margin-top:1rem" data-held="true">{{.Stack.HoldReason}} <a href="/backups/apps" class="btn btn-sm btn-outline">Mentések</a></div>
+{{else if .Stack.UpdateError}}
+<div class="alert alert-warning" style="margin-top:1rem" data-update-error="true">{{.Stack.UpdateError}}</div>
+{{end}}
+
 {{if .MissingStorageLabel}}
 <div class="alert alert-warning" style="margin-top:1rem">
     <strong><svg class="ico ico-sm"><use href="#i-triangle-alert"/></svg> Hiányzó tárhely: {{.MissingStorageLabel}}</strong><br>
diff --git a/controller/internal/web/templates/layout.html b/controller/internal/web/templates/layout.html
index cd9c339..4e7e480 100644
--- a/controller/internal/web/templates/layout.html
+++ b/controller/internal/web/templates/layout.html
@@ -284,6 +284,13 @@
                 btn.classList.remove('loading');
                 return;
             }
+            // Slice 4: an update is ACCEPTED, not finished (HTTP 202). Follow its phases on this
+            // button until the box says it is done or failed — never reload into a page that still
+            // shows the old state as if nothing were happening.
+            if (action === 'update') {
+                followUpdate(name, btn);
+                return;
+            }
             window.location.reload();
         } catch (err) {
             showAlert('Hálózati hiba: ' + err.message);
@@ -292,6 +299,19 @@
             btn.classList.remove('loading');
         }
     }
+    function followUpdate(name, btn) {
+        var started = Date.now();
+        var timer = setInterval(async function() {
+            if (Date.now() - started > 30 * 60 * 1000) { clearInterval(timer); window.location.reload(); return; }
+            try {
+                var r = await fetch('/api/stacks/' + name);
+                var d = await r.json();
+                if (!d.ok || !d.data) return;
+                if (d.data.update_phase_label) btn.textContent = d.data.update_phase_label;
+                if (!d.data.updating) { clearInterval(timer); window.location.reload(); }
+            } catch (e) {}
+        }, 3000);
+    }
     async function deleteOrphanStack(name) {
         var modal = document.createElement('div');
         modal.className = 'modal-overlay';
diff --git a/controller/internal/web/templates/stacks.html b/controller/internal/web/templates/stacks.html
index 7542959..3d909b7 100644
--- a/controller/internal/web/templates/stacks.html
+++ b/controller/internal/web/templates/stacks.html
@@ -86,11 +86,22 @@
                 {{if canInstall .Meta}}<a href="/stacks/{{.Name}}/deploy" class="btn btn-primary" onclick="return checkBeforeDeploy(event, '{{.Name}}')">Telepítés</a>{{end}}
                 <a href="{{appPageURL .Meta.Slug}}" class="btn btn-outline">Részletek</a>
             {{else}}
-                {{if isOperational .State}}
+                {{/* Slice 4 (v0.238.0): the UPDATING and HELD checks come BEFORE isOperational. That
+                     predicate counts `restarting` as operational, which is how the 2026-09-01 spike saw
+                     a green Frissítés beside a crash loop. An app being updated offers no lifecycle
+                     button; a held app offers none that would start it, only the way back. */}}
+                {{if .Updating}}
+                    <span class="tag tag-progress" data-update-phase="{{.UpdatePhase}}"><span class="dot"></span>{{.UpdatePhaseLabel}}</span>
+                {{else if .HoldReason}}
+                    <div class="alert alert-error" data-held="true">{{.HoldReason}} <a href="/backups/apps" class="btn btn-sm btn-outline">Mentések</a></div>
+                    {{if not .Orphaned}}<button class="btn btn-danger" onclick="removeStack('{{.Name}}')">Eltávolítás</button>{{end}}
+                {{else if isOperational .State}}
+                    {{if .UpdateError}}<div class="alert alert-warning" data-update-error="true">{{.UpdateError}}</div>{{end}}
                     {{if not .Orphaned}}<button class="btn btn-success" onclick="stackAction(event, '{{.Name}}', 'update')">Frissítés</button>{{end}}
                     <button class="btn btn-warning" onclick="stackAction(event, '{{.Name}}', 'restart')">Újraindítás</button>
                     <button class="btn btn-danger" onclick="stackAction(event, '{{.Name}}', 'stop')">Leállítás</button>
                 {{else}}
+                    {{if .UpdateError}}<div class="alert alert-warning" data-update-error="true">{{.UpdateError}}</div>{{end}}
                     <button class="btn btn-success" onclick="stackAction(event, '{{.Name}}', 'start')">Indítás</button>
                     {{if not .Orphaned}}<button class="btn btn-danger" onclick="removeStack('{{.Name}}')">Eltávolítás</button>{{end}}
                 {{end}}