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/templates/stacks.html

@@ -91,17 +91,17 @@
                      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>
+                    <span class="tag tag-progress" data-update-phase="{{.UpdatePhase}}"><span class="dot"></span>{{updatePhaseText .}}</span>
                 {{else if .HoldReason}}
-                    <div class="alert alert-error" data-held="true">{{.HoldReason}} <a href="/backups/apps" class="btn btn-sm btn-outline">{{T "stacks.mentesek"}}</a></div>
+                    <div class="alert alert-error" data-held="true">{{holdText .}} <a href="/backups/apps" class="btn btn-sm btn-outline">{{T "stacks.mentesek"}}</a></div>
                     {{if not .Orphaned}}<button class="btn btn-danger" onclick="removeStack('{{.Name}}')">{{T "common.eltavolitas"}}</button>{{end}}
                 {{else if isOperational .State}}
-                    {{if .UpdateError}}<div class="alert alert-warning" data-update-error="true">{{.UpdateError}}</div>{{end}}
+                    {{if .UpdateError}}<div class="alert alert-warning" data-update-error="true">{{updateErrorText .}}</div>{{end}}
                     {{if not .Orphaned}}<button class="btn btn-success" onclick="stackAction(event, '{{.Name}}', 'update')">{{T "stacks.frissites"}}</button>{{end}}
                     <button class="btn btn-warning" onclick="stackAction(event, '{{.Name}}', 'restart')">{{T "common.ujrainditas"}}</button>
                     <button class="btn btn-danger" onclick="stackAction(event, '{{.Name}}', 'stop')">{{T "stacks.leallitas"}}</button>
                 {{else}}
-                    {{if .UpdateError}}<div class="alert alert-warning" data-update-error="true">{{.UpdateError}}</div>{{end}}
+                    {{if .UpdateError}}<div class="alert alert-warning" data-update-error="true">{{updateErrorText .}}</div>{{end}}
                     <button class="btn btn-success" onclick="stackAction(event, '{{.Name}}', 'start')">{{T "stacks.inditas"}}</button>
                     {{if not .Orphaned}}<button class="btn btn-danger" onclick="removeStack('{{.Name}}')">{{T "common.eltavolitas"}}</button>{{end}}
                 {{end}}