controller v0.264.0: the household is told when an update is undone or held, in its language

app_update_undone / app_update_held events (09 decision 15), on by
default and seeded once on existing boxes; R-606 update sentences as
key+args rendered per reader; R-646 startup applied-meta backfill for
apps current with the catalog; R-620 a disabled notifier WARNs once per
event type. Needs hub v0.120.0.

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

controller/internal/web/testdata/i18n_parity/settings_notifications_hub.html

@@ -240,6 +240,14 @@
                         <input type="checkbox" name="event_app_start_failed" >
                         <span class="toggle-label">Alkalmazás nem fut</span>
                     </label>
+                    <label class="toggle">
+                        <input type="checkbox" name="event_app_update_undone" >
+                        <span class="toggle-label">Frissítés visszavonva (az alkalmazás a korábbi változattal fut)</span>
+                    </label>
+                    <label class="toggle">
+                        <input type="checkbox" name="event_app_update_held" >
+                        <span class="toggle-label">Frissítés sikertelen, az alkalmazás leállítva</span>
+                    </label>
                 </div>
             </div>
             <div class="form-group">